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367 results on '"L., Maraschi"'

1. Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020

Author: V A Acciari, S Ansoldi, L A Antonelli, A Arbet Engels, M Artero, K Asano, D Baack, A Babić, A Baquero, U Barres de Almeida, J A Barrio, I Batković, J Becerra González, W Bednarek, L Bellizzi, E Bernardini, M Bernardos, A Berti, J Besenrieder, W Bhattacharyya, C Bigongiari, A Biland, O Blanch, G Bonnoli, Ž Bošnjak, G Busetto, R Carosi, G Ceribella, M Cerruti, Y Chai, A Chilingarian, S Cikota, S M Colak, E Colombo, J L Contreras, J Cortina, S Covino, G D’Amico, V D’Elia, P Da Vela, F Dazzi, A De Angelis, B De Lotto, M Delfino, J Delgado, C Delgado Mendez, D Depaoli, F Di Pierro, L Di Venere, E Do Souto Espiñeira, D Dominis Prester, A Donini, D Dorner, M Doro, D Elsaesser, V Fallah Ramazani, A Fattorini, G Ferrara, M V Fonseca, L Font, C Fruck, S Fukami, R J García López, M Garczarczyk, S Gasparyan, M Gaug, N Giglietto, F Giordano, P Gliwny, N Godinović, J G Green, D Green, D Hadasch, A Hahn, L Heckmann, J Herrera, J Hoang, D Hrupec, M Hütten, T Inada, S Inoue, K Ishio, Y Iwamura, I Jiménez, J Jormanainen, L Jouvin, Y Kajiwara, M Karjalainen, D Kerszberg, Y Kobayashi, H Kubo, J Kushida, A Lamastra, D Lelas, F Leone, E Lindfors, S Lombardi, F Longo, R López-Coto, M López-Moya, A López-Oramas, S Loporchio, B Machado de Oliveira Fraga, C Maggio, P Majumdar, M Makariev, M Mallamaci, G Maneva, M Manganaro, K Mannheim, L Maraschi, M Mariotti, M Martínez, D Mazin, S Menchiari, S Mender, S Mićanović, D Miceli, T Miener, M Minev, J M Miranda, R Mirzoyan, E Molina, A Moralejo, D Morcuende, V Moreno, E Moretti, V Neustroev, C Nigro, K Nilsson, K Nishijima, K Noda, S Nozaki, Y Ohtani, T Oka, J Otero-Santos, S Paiano, M Palatiello, D Paneque, R Paoletti, J M Paredes, L Pavletić, P Peñil, C Perennes, M Persic, P G Prada Moroni, E Prandini, C Priyadarshi, I Puljak, W Rhode, M Ribó, J Rico, C Righi, A Rugliancich, L Saha, N Sahakyan, T Saito, S Sakurai, K Satalecka, F G Saturni, B Schleicher, K Schmidt, T Schweizer, J Sitarek, I Šnidarić, D Sobczynska, A Spolon, A Stamerra, D Strom, M Strzys, Y Suda, T Surić, M Takahashi, F Tavecchio, P Temnikov, T Terzić, M Teshima, L Tosti, S Truzzi, A Tutone, S Ubach, J van Scherpenberg, G Vanzo, M Vazquez Acosta, S Ventura, V Verguilov, C F Vigorito, V Vitale, I Vovk, M Will, C Wunderlich, D Zarić, F de Palma, F D’Ammando, A Barnacka, D K Sahu, M Hodges, T Hovatta, S Kiehlmann, W Max-Moerbeck, A C S Readhead, R Reeves, T J Pearson, A Lähteenmäki, I Björklund, M Tornikoski, J Tammi, S Suutarinen, K Hada, and K Niinuma
Published: 2021
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2. The X-Ray Jet of PKS 0637-752: Inverse Compton Radiation from the Cosmic Microwave Background ?

Author: Tavecchio, F., Sambruna, L. Maraschi R. M., and Urry, C. M.
Subjects: Astrophysics
Abstract: We propose that the X-ray emission detected by Chandra from the 100-kiloparsec-scale jet of PKS 0637-752 is produced through inverse Compton scattering of the Cosmic Microwave Background (CMB). We analyze the physical state of the jet and show that inverse Compton scattering from the CMB is consistent with equipartition for a moderate beaming of the emission, with Doppler factor delta~10. The power transported by the jet is then similar to that of other powerful blazars, Lj~10^{48} erg/s and the jet has low radiative efficiency. The radiative cooling times of the electrons are a few thousand years, compatible with the size of the knot. The low-energy cutoff of the electron distribution is constrained to be gamma_min~10, the first such constraint from spectral considerations. A parallel analysis for the SSC model yields far less reasonable physical conditions., Comment: 14 pages, 2 figures, submitted to ApJ Letters
Published: 2000
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3. Multiwavelength Variability and Correlation Studies of Mrk 421 During Historically Low X-ray and Y-ray Activity in 2015–2016

Author: Janeth Valverde Quispe, V. A. Acciari, S. Ansoldi, L. A. Antonelli, K. Asano, A. Babic, B. Banerjee, A. Baquero, U.BarresdeAlmeida, J. A. Barrio, J. Becerra Gonzalez, W. Bednarek, L. Bellizzi, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, O. Blanch, G. Bonnoli, Z. Bosnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, T. Di Girolamo, F. Di Pierro, L. Di Venere, E. Do Souto Espineira, D. Dominis Prester, A. Donini, M. Doro, V. Fallah Ramazani, A. Fattorini, G. Ferrara, L. Foffano, M. V. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. Garcıa Lopez, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinovic, J. G. Green, D. Green, D. Hadasch, A. Hahn, L. Heckmann, J. Herrera, J. Hoang, D. Hrupec, M. Hutten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, J. Jormanainen, L. Jouvin, Y. Kajiwara, M. Karjalainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, M. Lopez, R. Lopez-Coto, A. Lopez-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, L. Maraschi, M. Mariotti, M. Martınez, D. Mazin, S. Mender, S. Micanovic, D. Miceli, T. Miener, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, V. Moreno, E. Moretti, P. Munar-Adrover, V. Neustroev, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletic, P. P enil, C. Perennes, M. Persic, P. G . Prada Moroni, E. Prandini, C. Priyadarshi, I. Puljak, W. Rhode, M. Ribo, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, I. Snidaric, D. Sobczynska, A. Spolon, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Suric, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzic, M. Teshima, N. Torres-Alba, L. Tosti, S. Truzzi, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, D. Zaric, A. Arbet-Engels, D. Baack, M. Balbo, M. Beck, N. Biederbeck, A. Biland, T. Bretz, K. Bruegge, J. Buss, D. Dorner, D. Elsaesser, D. Hildebrand, R. Iotov, M. Klinger, K. Mannheim, D. Neise, A. Neronov, M. Noethe, A. Paravac, V. Sliusar, F. Theissen, R. Walter, J. Valverde, D. Horan, M. Giroletti, M. Perri, F. Verrecchia, C. Leto, A. C. Sadun, J. W. Moody, M. Joner, A. P. Marscher, S. G. Jorstad, A. Lahteenmaki, M. Tornikoski, V. Ramakrishnan, E. Jarvela, R. J. C. Vera, S. Righini, and A.Y.Lien
Subjects: Astronomy
Abstract: We report a characterization of the multiband flux variability and correlations of the nearby (z=0.031) blazar Markarian 421(Mrk 421) using data from Mets ̈ahovi, Swift, Fermi-LAT, MAGIC, FACT, and other collaborations and instruments from 2014November till 2016 June. Mrk 421 did not show any prominent flaring activity, but exhibited periods of historically low activity above 1 TeV (F>1TeV<1.7×10−12ph cm−2s−1) and in the 2–10 keV (X-ray) band (F2−10 keV<3.6×10−11erg cm−2s−1),during which the Swift-BAT data suggest an additional spectral component beyond the regular synchrotron emission. The highest flux variability occurs in X-rays and very high-energy (E>0.1 TeV)γ-rays, which, despite the low activity, show a significant positive correlation with no time lag. The HRkeV and HRTeV show the harder-when-brighter trend observed in many blazars, but the trend flattens at the highest fluxes, which suggests a change in the processes dominating the blazar variability. Enlarging our dataset with data from years 2007 to 2014, we measured a positive correlation between the optical and the GeV emission over a range of about 60 d centred at time lag zero, and a positive correlation between the optical/GeV and the radio emission over a range of about 60 d centred at a time lag of 43+9−6d. This observation is consistent with the radio-bright zone being located about 0.2 parsec downstream from the optical/GeV emission regions of the jet. The flux distributions are better described with a lognormal function in most of the energy bands probed, indicating that the variability in Mrk 421 is likely produced by a multiplicative process.
Published: 2020
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4. Observation of inverse Compton emission from a long γ-ray burst

Author: P. Veres, P. N. Bhat, M. S. Briggs, W. H. Cleveland, R. Hamburg, C. M. Hui, B. Mailyan, R. D. Preece, O. J. Roberts, A. von Kienlin, C. A. Wilson-Hodge, D. Kocevski, M. Arimoto, D. Tak, K. Asano, M. Axelsson, G. Barbiellini, E. Bissaldi, F.Fana Dirirsa, R. Gill, J. Granot, J. McEnery, N. Omodei, S. Razzaque, F. Piron, J. L. Racusin, D. J. Thompson, S. Campana, M. G. Bernardini, N. P. M. Kuin, M. H. Siegel, S. B. Cenko, P. O’Brien, M. Capalbi, A. Daì, M. De Pasquale, J. Gropp, N. Klingler, J. P. Osborne, M. Perri, R. L. C. Starling, G. Tagliaferri, A. Tohuvavohu, A. Ursi, M.Tavani, M. Cardillo, C. Casentini, G. Piano, Y. Evangelista, F. Verrecchia, C. Pittori, F. Lucarelli, A. Bulgarelli, N. Parmiggiani, G. E. Anderson, J. P. Anderson, G. Bernardi, J. Bolmer, M. D. Caballero-García, I. M. Carrasco, A. Castellón, N. Castro Segura, A. J. Castro-Tirado, S. V. Cherukuri, A. M. Cockeram, P. D’Avanzo, A. Di Dato, R. Diretse, R. P. Fender, E. Fernández-García, J. P. U. Fynbo, A. S.Fruchter, J. Greiner, M. Gromadzki, K. E. Heintz, I. Heywood, A. J. van der Horst, Y.-D. Hu, C. Inserra, L. Izzo, V. Jaiswal, P. Jakobsson, J. Japelj, E. Kankare, D. A.Kann, C. Kouveliotou, S. Klose, A. J. Levan, X. Y. Li, S. Lotti, K. Maguire, D. B. Malesani, I. Manulis, M. Marongiu, S. Martin, A. Melandri, M. J.Michałowski, J. C. A. Miller-Jones, K. Misra, A. Moin, K. P. Mooley, S. Nasri, M. Nicholl, A. Noschese, G. Novara, S. B. Pandey, E. Peretti, C. J. Pérez del Pulgar, M. A. Pérez-Torres, D. A. Perley, L. Piro, F. Ragosta, L. Resmi, R. Ricci, A. Rossi, R. Sánchez-Ramírez, J. Selsing, S. Schulze, S. J. Smartt, I. A. Smith, V. V. Sokolov, J. Stevens, N. R. Tanvir, C. C. Thöne, A. Tiengo, E. Tremou, E. Troja, A. de Ugarte Postigo, A. F. Valeev, S. D. Vergani, M. Wieringa, P. A. Woudt, D. Xu, O. Yaron, D. R. Young, V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, D. Baack, A. Babić, B. Banerjee, U. Barres de Almeida, J. A. Barrio, J. Becerra González, W. Bednarek, L. Bellizzi, E. Bernardini, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, G. Busetto, R. Carosi, G. Ceribella, Y. Chai, A. Chilingaryan, S. Cikota, S. M. Colak, U. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espiñeira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, G. Ferrara, D. Fidalgo, L. Foffano, M. V. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. García López, M. Garczarczyk, S.Gasparyan, M. Gaug, N. Giglietto, F. Giordano, N. Godinović, D. Green, D. Guberman, D. Hadasch, A. Hahn, J. Herrera, J. Hoang, D. Hrupec, M. Hütten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, L. Jouvin, D. Kerszberg, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, M. López, R. López-Coto, A. López-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, D. Mazin, S. Mićanović, D. Miceli, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, V. Moreno, E. Moretti, P. Munar-Adrover, V. Neustroev, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, L. Nogués, S. Nozaki, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, P. Peñil, M. Peresano, M. Persic, P. G. Prada Moroni, E. Prandini, I. Puljak, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, K. Schmidt, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Somero, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Surić, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, N. Torres-Albà, L. Tosti, V. Vagelli, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, D. Zarić, and L. Nava
Subjects: Space Sciences (General)
Abstract: Long-duration γ-ray bursts (GRBs) originate from ultra-relativistic jets launched from the collapsing cores of dying massive stars. They are characterized by an initial phase of bright and highly variable radiation in the kiloelectronvolt-to-megaelectronvolt band, which is probably produced within the jet and lasts from milliseconds to minutes, known as the prompt emission. Subsequently, the interaction of the jet with the surrounding medium generates shock waves that are responsible for the afterglow emission, which lasts from days to months and occurs over a broad energy range from the radio to the gigaelectronvolt bands. The afterglow emission is generally well explained as synchrotron radiation emitted by electrons accelerated by the external shock. Recently, intense long-lasting emission between 0.2 and 1 teraelectronvolts was observed from GRB 190114C. Here we report multifrequency observations of GRB 190114C, and study the evolution in time of the GRB emission across 17 orders of magnitude in energy, from 5 × 10^(−6) to 10^(12) electronvolts. We find that the broadband spectral energy distribution is double-peaked, with the teraelectronvolt emission constituting a distinct spectral component with power comparable to the synchrotron component. This component is associated with the afterglow and is satisfactorily explained by inverse Compton up-scattering of synchrotron photons by high-energy electrons. We find that the conditions required to account for the observed teraelectronvolt component are typical for GRBs, supporting the possibility that inverse Compton emission is commonly produced in GRBs.
Published: 2019
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5. MAGIC and Fermi-LAT gamma-ray results on unassociated HAWC sources

Author: M. L. Ahnen, S. Ansoldi, L. A. Antonelli, C. Arcaro, D. Baack, A. Babic, B. Banerjee, P. Bangale, U. Barres de Almeida, J. A. Barrio, J. Becerra Gonzalez, W. Bednarek, E. Bernardini, R. Ch. Berse, A. Berti, W. Bhattacharyya, A. Biland, O. Blanch, G. Bonnoli, R. Carosi, A. Carosi, G. Ceribella, A. Chatterjee, S. M. Colak, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, P. Cumani, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, F. Di Pierro, A. Domınguez, D. Dominis Prester, D. Dorner, M. Doro, S. Einecke, D. Elsaesser, V. Fallah Ramazani, A. Fernandez-Barral, D. Fidalgo, M. V. Fonseca, L. Font, C. Fruck, D. Galindo, R. J. Garcıa Lopez, M. Garczarczyk, M. Gaug, P. Giammaria, N. Godinovic, D. Gora, D. Guberman, D. Hadasch, A. Hahn, T. Hassan, M. Hayashida, J. Herrera, J. Hose, D. Hrupec, K. Ishio, Y. Konno, H. Kubo, J. Kushida, D. Kuvezdic, D. Lelas, E. Lindfors, S. Lombardi, F. Longo, M. Lopez, C. Maggio, P. Majumdar, M. Makariev, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martınez, S. Masuda, D. Mazin, K. Mielke, M. Minev, J. M. Miranda, R. Mirzoyan, A. Moralejo, V. Moreno, E. Moretti, T. Nagayoshi, V. Neustroev, A. Niedzwiecki, M. Nievas Rosillo, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, L. Nogues, S. Paiano, J. Palacio, D. Paneque, R. Paoletti, J. M. Paredes, G. Pedaletti, M. Peresano, M. Persic, P. G. Prada Moroni, E. Prandini, I. Puljak, J. R. Garcia, I. Reichardt, W. Rhodes, M. Ribo, J. Rico, C. Righi, A. Rugliancich, T. Saito, K. Satalecka, T. Schweizer, J. Sitarek, I. Snidaric, D. Sobczynska, A. Stamerra, M. Strzys, T. Suric, M. Takahashi, L. Takalo, F. Tavecchio, P. Temnikov, T. Terzic, M. Teshima, N. Torres-Alba, A. Treves, S. Tsujimoto, G. Vanzo, M. Vazquez Acosta, I. Vovk, J. E. Ward, M. Will, D. Zaric, A. Albert, R. Alfaro, C. Alvarez, R. Arceo, J. C. Arteaga-Velazquez, D. Avila Rojas, H. A. Ayala Solares, A. Becerril, E. Belmont-Moreno, S. Y. BenZvi, A. Bernal, J. Braun, K. S. Caballero-Mora, T. Capistran, A. Carraminana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. Coutino de Leon, C. De Leon, E. De la Fuente, R. Diaz Hernandez, S. Dichiara, B. L. Dingus, M. A. DuVernois, J. C. Dıaz-Velez, R. W. Ellsworth, K. Engel, O. Enriquez-Rivera, D. W. Fiorino, H. Fleischhack, N. Fraija, J. A. Garcıa-Gonzalez, F. Garfias, A. Gonzalez-Munoz, M. M. Gonzalez, J. A. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernandez, F. Hueyotl-Zahuantitla, C. M. Hui, P. Huntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, A. Lara, R. J. Lauer, W. H. Lee, D. Lennarz, H. Leon Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, R. Luna-Garcıa, R. Lopez-Coto, K. Malone, S. S. Marinelli, O. Martinez, I. Martinez-Castellanos, J. Martınez-Castro, H. Martınez-Huerta, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, A. Nayerhoda, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. G. Perez-Perez, Z. Ren, C. D. Rho, C. Riviere, D. Rosa-Gonzalez, M. Rosenberg, E. Ruiz-Velasco, F. Salesa Greus, A. Sandoval, M. Schneider, M. Seglar Arroyo, G. Sinnis, A. J. Smith, R. W. Springer, P. Surajbali, I. Taboada, O. Tibolla, K. Tollefson, I. Torres, T. N. Ukwatta, G. Vianello, L. Villasenor, F. Werner, S. Westerhoff, J. Wood, T. Yapici, G. Yodh, A. Zepeda, H. Zhou, J. D. Alvarez, M. Ajello, L. Baldini, G. Barbiellini, B. Berenji, E. Bissaldi, R. D. Blandford, R. Bonino, E. Bottacini, T. J. Brandt, J. Bregeon, P. Bruel, R. A. Cameron, R. Caputo, P. A. Caraveo, D. Castro, E. Cavazzuti, G. Chiaro, S. Ciprini, D. Costantin, F. D'Ammando, F. de Palma, A. Desai, N. Di Lalla, M. Di Mauro, L. Di Venere, C. Favuzzi, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, D. Green, I. A. Grenier, S. Guiriec, A. K. Harding, E. Hays, J. W. Hewitt, D. Horan, G. Johannesson, M. Kuss, S. Larsson, I. Liodakis, F. Loparco, P. Lubrano, J. D. Magill, S. Maldera, A. Manfreda, M. N. Mazziotta, I. Mereu, P. F. Michelson, T. Mizuno, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, E. Nuss, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, M. Palatiello, V. S. Paliya, M. Pesce-Rollins, V. Petrosian, F. Piron, T. A. Porter, G. Principe, S. Raino, B. Rani, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, C. Sgro, E. J. Siskind, G. Spandre, P. Spinelli, H. Tajima, J. B. Thayer, David J Thompson, D. F. Torres, E. Torresi, E. Troja, J. Valverde, K. Wood, and M. Yassine
Subjects: Astronomy, Astrophysics
Abstract: The HAWC Collaboration released the 2HWC catalogue of TeV sources, in which 19 show no association with any known high-energy (HE; E ≳ 10 GeV) or very-high-energy (VHE; E ≳ 300 GeV) sources. This catalogue motivated follow-up studies by both the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) and Fermi-LAT (Large Area Telescope) observatories with the aim of investigating gamma-ray emission over a broad energy band. In this paper, we report the results from the first joint work between High Altitude Water Cherenkov (HAWC), MAGIC, and Fermi-LAT on three unassociated HAWC sources: 2HWC J2006+341, 2HWC J1907+084*, and 2HWC J1852+013*. Although no significant detection was found in the HE and VHE regimes, this investigation shows that a minimum 1° extension (at 95 per cent confidence level) and harder spectrum in the GeV than the one extrapolated from HAWC results are required in the case of 2HWC J1852+013*, whilst a simply minimum extension of 0.16° (at 95 per cent confidence level) can already explain the scenario proposed by HAWC for the remaining sources. Moreover, the hypothesis that these sources are pulsar wind nebulae is also investigated in detail.
Published: 2019
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6. MAGIC observations of HESS J1809-193 using the Very Large Zenith Angle technique at energies above TeV

Author: Wrijupan Bhattacharyya, Chiara Righi, Jordi Delgado, M. I. Martínez, Giacomo D'Amico, Chaitanya Priyadarshi, Manuel Artero, Francesco Longo, Katsuaki Asano, Andrés Baquero, Tomislav Terzić, Maria Victoria Fonseca, Kevin Schmidt, Yusuke Suda, Sidika Merve Colak, Carlo Vigorito, Daniel Kerszberg, Jarred Gershon Green, Davide Depaoli, Monica Vazquez Acosta, Nikola Godinovic, Elia Do Souto Espiñeira, Lena Linhoff, Pratik Majumdar, Leonardo Di Venere, Louis Antonelli, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Stefano Menchiari, Michele Palatiello, Paolo Da Vela, Junko Kushida, David H. Green, Lovro Pavletić, Vandad Fallah Ramazani, Francesco Dazzi, Javier Rico, Tokonatsu Yamamoto, Martin Makariev, Josep M. Paredes, Antonio Stamerra, Martin Will, Vitaly Neustroev, Oscar Blanch, Tihomir Surić, Carolin Wunderlich, John Hoang, Marc Ribó, Santiago Ubach, Iva Šnidarić, Lorenzo Bellizzi, Jorge Otero-Santos, Luca Tosti, Ciro Bigongiari, Markus Garczarczyk, Kazuma Ishio, Seiya Nozaki, Manuel Delfino, Ulisses Barres de Almeida, Marina Manganaro, Manuela Mallamaci, Valerio D'Elia, Satoshi Fukami, Hidetoshi Kubo, Tomohiro Inada, Victor A. Acciari, Yating Chai, Dario Hrupec, Stefan Cikota, Alessandro De Angelis, G. Maneva, Abelardo Moralejo, Elisa Prandini, Elena Moretti, Pawel Gliwny, Nicola Giglietto, Mitsunari Takahashi, Masahiro Teshima, Massimo Persic, Adrian Biland, Konstancja Satalecka, Moritz Hütten, Juan Abel Barrio, Michele Doro, Serena Loporchio, Victoria Moreno, Karl Mannheim, Darko Zarić, Narek Sahakyan, Stefano Truzzi, Lluis Font, Tomohiko Oka, Ashot Chilingarian, Maria-Isabel Bernardos, Alice Donini, Josefa González, Alicia López-Oramas, Bernd Schleicher, Roberto Carosi, Carlos Delgado Mendez, Pablo Peñil, Marcel Strzys, Edgar Molina, Tjark Miener, Giacomo Bonnoli, Kyoshi Nishijima, David Paneque, Davide Miceli, Ana Babić, Simona Paiano, Thomas Schweizer, Simone Mender, Javier Herrera, P. G. Prada Moroni, Alessia Spolon, Alicia Fattorini, Léa Jouvin, Cosimo Nigro, Stefano Ansoldi, Jelena Strišković, Sofia Ventura, Alexander Hahn, Riccardo Paoletti, Markus Gaug, Lara Nava, Saša Mićanović, Alessandra Lamastra, Takeshi Nakamori, Daniel Morcuende, Jose Luis Contreras, Vassil Verguilov, Fabrizio Tavecchio, Barbara De Lotto, Camilla Maggio, Daniela Dorner, Alessio Berti, Eduardo Colombo, Ivana Batković, Vincenzo Vitale, Gaia Vanzo, Axel Arbet Engels, Juan Cortina, Marine Pihet, Petar Temnikov, Koji Noda, Elisa Bernardini, D. Dominis Prester, Hendrik Bökenkamp, Francesco Leone, Jenni Jormanainen, Sargis Gasparyan, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Wolfgang Rhode, Bernardo Machado de Oliveira Fraga, Giovanni Busetto, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, Shunsuke Sakurai, Jose Miguel Miranda, Juliane van Scherpenberg, Matteo Cerruti, Yasushi Fukazawa, Ievgen Vovk, Mosè Mariotti, Ivica Puljak, Saverio Lombardi, Andrea Rugliancich, Ramon J. García López, Marie Karjalainen, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Zeljka Bosnjak, L. Maraschi, Elina Lindfors, Daniel Mazin, Stefano Covino, Giovanni Ceribella, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Yuki Iwamura, Julian Sitarek, Daniela Hadasch, and Yoshiki Ohtani
Subjects: Astroparticle physics, Physics, Supernova, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Cosmic ray, MAGIC (telescope), Astrophysics, Zenith
Abstract: The origin of Galactic Cosmic rays (GCRs), whose spectrum extends to PeV energies, is one of the longest-standing problems in astroparticle physics. One of the main sources of GCRs are regarded to be Supernova remnants (SNRs). While SNRs are known to accelerate protons, so far there is no evidence that SNRs can accelerate CRs to PeV energies. Providing that ~10% of the parent Cosmic ray energy is converted to gamma rays, the gamma-ray spectrum extending up to ~100 TeV would be a signature of a so-called Galactic PeVatron, an object responsible for the production of protons up to the knee of the Cosmic ray spectrum. The current multi-wavelength data indicate that HESS J1809-193 is one of the most promising Galactic PeVatron candidates. So far, no firm identification on the source nature has been established as there are several possible counterparts at lower energies; one of them being SNR G11.0−0.0. We report here the results of an observational campaign performed by the MAGIC telescopes on HESS J1809-193 since 2019 in the very-high-energy gamma-ray domain (E>100 GeV). The data were obtained with the Very Large Zenith Angle (VLZA) technique, which increased the collection area significantly to about one square kilometer. We used ~60 hours of collected VLZA data to explore the spectrum and the morphology of the source at energies above several TeV., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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7. Recent MAGIC results on Galactic binaries

Author: Pablo Peñil, Saša Mićanović, Ivana Batković, Francesco Longo, Sargis Gasparyan, Wolfgang Rhode, Giovanni Busetto, Daniel Kerszberg, Shunsuke Sakurai, Marie Karjalainen, Tomohiko Oka, Mosè Mariotti, Kyoshi Nishijima, Tihomir Surić, Giacomo Bonnoli, Takeshi Nakamori, P. G. Prada Moroni, Matteo Cerruti, Elia Do Souto Espiñeira, Pratik Majumdar, Barbara De Lotto, Yuki Iwamura, Camilla Maggio, Daniela Dorner, Alexander Hahn, Lena Linhoff, Tjark Miener, L. Maraschi, Elina Lindfors, Gaia Vanzo, Dominik Elsaesser, Razmik Mirzoyan, David Paneque, John Hoang, Christian Fruck, Thomas Schweizer, Marc Ribó, Daniel Mazin, Damir Lelas, Jelena Strišković, Yasushi Fukazawa, Daniel Morcuende, Jose Luis Contreras, Dario Hrupec, Manuela Mallamaci, Martin Will, Saverio Lombardi, Manuel Artero, Andrea Rugliancich, Stefano Ansoldi, Jorge Otero-Santos, Petar Temnikov, Koji Noda, Karl Mannheim, Massimo Persic, Lea Heckmann, Francesco Gabriele Saturni, Riccardo Paoletti, Marine Pihet, Marina Manganaro, Elisa Bernardini, Alessandro De Angelis, Markus Gaug, Martin Makariev, Hidetoshi Kubo, Tomohiro Inada, Dorota Sobczyńska, Mitsunari Takahashi, Oscar Blanch, Juan Cortina, Vandad Fallah Ramazani, Alicia López-Oramas, Josep M. Paredes, Louis Antonelli, Antonio Stamerra, Elena Moretti, D. Dominis Prester, Lluis Font, Tomislav Terzić, Seiya Nozaki, Konstancja Satalecka, Michele Doro, Julian Sitarek, Juliane van Scherpenberg, Michele Palatiello, Stefano Covino, Ivica Puljak, Serena Loporchio, Jenni Jormanainen, Daniela Hadasch, Katsuaki Asano, Giacomo D'Amico, Davide Depaoli, Hendrik Bökenkamp, Alice Donini, Bernardo Machado de Oliveira Fraga, Yoshiki Ohtani, Jordi Delgado, Maria Victoria Fonseca, Iva Šnidarić, Ž. Bošnjak, Roberto Carosi, Nikola Godinovic, Lara Nava, Ramon J. García López, Kevin Schmidt, Alessio Berti, Abelardo Moralejo, Giovanni Ceribella, Francesco Dazzi, Fabrizio Tavecchio, Ievgen Vovk, Davide Miceli, Jarred Gershon Green, Takashi Saito, Adrian Biland, Alessia Spolon, Eduardo Colombo, Junko Kushida, Lovro Pavletić, Léa Jouvin, Juan Abel Barrio, Marcel Strzys, Dominik Baack, Axel Arbet Engels, Narek Sahakyan, Vassil Verguilov, Yukiho Kobayashi, Carlos Delgado Mendez, Carolin Wunderlich, Ryuji Takeishi, Bernd Schleicher, Edgar Molina, D. M. Strom, Kari Nilsson, Simone Mender, Javier Herrera, Leonardo Di Venere, Andrés Baquero, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Ciro Bigongiari, Yusuke Suda, Carlo Vigorito, Wrijupan Bhattacharyya, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Victor A. Acciari, Moritz Hütten, Paolo Da Vela, David H. Green, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, Jose Miguel Miranda, Alessandra Lamastra, Vincenzo Vitale, Josefa González, M. I. Martínez, Maria-Isabel Bernardos, Simona Paiano, Alicia Fattorini, Sidika Merve Colak, Francesco Leone, Monica Vazquez Acosta, Yating Chai, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Victoria Moreno, Darko Zarić, Satoshi Fukami, Lorenzo Bellizzi, Masahiro Teshima, Cosimo Nigro, Sofia Ventura, Markus Garczarczyk, Kazuma Ishio, Santiago Ubach, Chiara Righi, Elisa Prandini, Chaitanya Priyadarshi, Ashot Chilingarian, Stefano Menchiari, and Stefano Truzzi
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Binary number, MAGIC (telescope), Astrophysics, Compact star, Radiation
Abstract: X-ray and gamma-ray binaries are systems consisting of a compact object and normally a non-degenerate companion star. Most of these sources have been shown to emit radiation in a broad frequency range, from radio up to X-rays and sometimes gamma rays. We report on recent results in very high-energy gamma rays above 100 GeV obtained by the MAGIC Collaboration for the Galactic X-ray binaries MAXI J1820+070 and 1A 0535+262, and the gamma-ray binary HESS J0632+057. Multiwavelength data at lower energies are also provided for a better contextualisation of the sources.
Published: 2022

8. Multi-messenger characterization of Mrk501 during historically low X-ray and gamma-ray activity

Author: Lluis Font, Marcel Strzys, Simone Mender, Javier Herrera, Stefano Covino, Christian Fruck, Tjark Miener, David Paneque, Francesco Dazzi, Andrés Baquero, Vandad Fallah Ramazani, Yusuke Suda, Josep M. Paredes, Antonio Stamerra, Cosimo Nigro, Carlo Vigorito, Jelena Strišković, M. I. Martínez, Giacomo D'Amico, Marcos López-Moya, Wlodek Bednarek, Jarred Gershon Green, Sofia Ventura, Javier Rico, Tokonatsu Yamamoto, Dario Hrupec, Mitsunari Takahashi, Giovanni Ceribella, Federico Di Pierro, Ruben Lopez-Coto, John Hoang, Lorenzo Bellizzi, Wrijupan Bhattacharyya, Vitaly Neustroev, Luca Tosti, Jordi Delgado, Manuel Artero, Kevin Schmidt, Marie Karjalainen, Irene Jiménez Martínez, Jose Miguel Miranda, Tihomir Surić, Michele Palatiello, Chiara Righi, Valerio D'Elia, Yuki Iwamura, Francesco Longo, Ciro Bigongiari, Tomislav Terzić, Daniela Dorner, Yating Chai, Stefan Cikota, Massimo Persic, Pawel Gliwny, Nicola Giglietto, G. Maneva, Iva Šnidarić, Giacomo Bonnoli, Gaia Vanzo, Lena Linhoff, P. G. Prada Moroni, Louis Antonelli, L. Maraschi, Elina Lindfors, Junko Kushida, Lovro Pavletić, Elia Do Souto Espiñeira, Alessandra Lamastra, Vincenzo Vitale, Juliane van Scherpenberg, Chaitanya Priyadarshi, Ivica Puljak, Karl Mannheim, Victoria Moreno, Alicia López-Oramas, Thomas Schweizer, Adrian Biland, Davide Depaoli, Marina Manganaro, Carolin Wunderlich, Darko Zarić, Daniel Mazin, Abelardo Moralejo, Satoshi Fukami, Francesco Leone, Ramon J. García López, Stefano Ansoldi, Julian Sitarek, Riccardo Paoletti, Martin Makariev, Petar Temnikov, Oscar Blanch, Leonardo Di Venere, Koji Noda, Elisa Bernardini, Daniela Hadasch, Katsuaki Asano, Ievgen Vovk, Markus Gaug, Masahiro Teshima, Maria Victoria Fonseca, Alessio Berti, Elena Moretti, Maria-Isabel Bernardos, Stefano Menchiari, Markus Garczarczyk, Konstancja Satalecka, Manuela Mallamaci, Jürgen Besenrieder, Dominik Elsaesser, Francesco Giordano, Antonio Tutone, Yoshiki Ohtani, Victor A. Acciari, Alessandro De Angelis, Bernd Schleicher, Edgar Molina, Paolo Da Vela, Razmik Mirzoyan, Josefa González, Michele Doro, Damir Lelas, Nikola Godinovic, Axel Arbet Engels, Sidika Merve Colak, Lea Heckmann, Francesco Gabriele Saturni, Monica Vazquez Acosta, Moritz Hütten, David H. Green, Takeshi Nakamori, Santiago Ubach, Barbara De Lotto, Dorota Sobczyńska, Zeljka Bosnjak, Tomohiko Oka, Roberto Carosi, Matteo Cerruti, Camilla Maggio, Simona Paiano, Kyoshi Nishijima, Alicia Fattorini, Kazuma Ishio, Yasushi Fukazawa, Elisa Prandini, Ashot Chilingarian, Davide Miceli, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Pratik Majumdar, Daniel Kerszberg, Marc Ribó, Martin Will, Jorge Otero-Santos, Hidetoshi Kubo, Tomohiro Inada, Seiya Nozaki, Juan Abel Barrio, Narek Sahakyan, Carlos Delgado Mendez, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Sargis Gasparyan, Daniel Morcuende, Jose Luis Contreras, Wolfgang Rhode, Giovanni Busetto, Juan Cortina, Stefano Truzzi, Pablo Peñil, Hendrik Bökenkamp, Saša Mićanović, Ivana Batković, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Shunsuke Sakurai, Alice Donini, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Serena Loporchio, D. Dominis Prester, Jenni Jormanainen, Bernardo Machado de Oliveira Fraga, Alexander Hahn, Marine Pihet, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Mosè Mariotti, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Active galactic nucleus, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Universe, Crab Nebula, MAGIC (telescope), Blazar, Astrophysics::Galaxy Astrophysics, media_common
Abstract: Blazars, together with other active galactic nuclei, are the most luminous persistent sources in our universe; and therefore a prime candidate for very-high-energy (>0.2 TeV, VHE) gamma-ray observations. For the two MAGIC telescopes, the Mrk501 galaxy is among the brightest observed blazars due to its proximity. We report a multi-wavelength and multi-messenger study of Mrk501 with data from 2017 to 2020, when Mrk501 showed a VHE flux typically below 10% that of the Crab Nebula. During this time, we performed three long observations with NuSTAR, which characterized the hard X-ray emission during three different low-activity flux levels. This Mrk501 dataset provided the unprecedented opportunity to study multi-wavelength variability and correlations with sensitive instruments during historically low X-ray and VHE gamma-ray emission (below 5% of the Crab Nebula flux in the VHE range), which could be considered as the baseline emission of Mrk501. We complemented the broadband spectral energy distributions (SED) of the identified historically low X-ray and VHE gamma-ray flux with data published by IceCube, in order to evaluate the potential existence of a hadronic component that is stable (or slowly variable), and less visible than the leptonic component that may dominate the emission during typical and flaring activity. In this contribution, we will also describe the evolution of the broadband SED comparing different theoretical scenarios., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022
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9. BL Lac object 1ES 0647+250, a decade of MWL observations

Author: Francesco Longo, John Hoang, Cosimo Nigro, Abelardo Moralejo, Elia Do Souto Espiñeira, Sofia Ventura, Lluis Font, Alessandra Lamastra, Josefa González, Alexander Hahn, Manuel Artero, Vincenzo Vitale, Chiara Righi, Martin Makariev, Oscar Blanch, Maria-Isabel Bernardos, Tomislav Terzić, Dominik Elsaesser, Razmik Mirzoyan, Marcel Strzys, Daniel Kerszberg, Marine Pihet, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Serena Loporchio, Damir Lelas, Simone Mender, Javier Herrera, Mosè Mariotti, Francesco Leone, Pratik Majumdar, Julian Sitarek, Davide Depaoli, Stefano Truzzi, Bernd Schleicher, Takeshi Nakamori, Lea Heckmann, Francesco Gabriele Saturni, Saverio Lombardi, Alice Donini, Andrea Rugliancich, Edgar Molina, D. Dominis Prester, Marc Ribó, Katsuaki Asano, Chaitanya Priyadarshi, Alessio Berti, Barbara De Lotto, Daniela Hadasch, Dorota Sobczyńska, Zeljka Bosnjak, Sidika Merve Colak, Monica Vazquez Acosta, Tomohiko Oka, Simona Paiano, Giacomo D'Amico, Lara Nava, Vandad Fallah Ramazani, Maria Victoria Fonseca, Martin Will, Hidetoshi Kubo, Tomohiro Inada, Jorge Otero-Santos, Pablo Peñil, Leonardo Di Venere, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Camilla Maggio, Satoshi Fukami, Alicia Fattorini, Fabrizio Tavecchio, Jenni Jormanainen, Josep M. Paredes, Louis Antonelli, L. Maraschi, Seiya Nozaki, Nikola Godinovic, Axel Arbet Engels, Eduardo Colombo, Adrian Biland, Antonio Stamerra, Elina Lindfors, Yoshiki Ohtani, Jordi Delgado, Marcos López-Moya, Ivica Puljak, Wlodek Bednarek, Federico Di Pierro, Giacomo Bonnoli, Kyoshi Nishijima, Bernardo Machado de Oliveira Fraga, Manuel Delfino, Ulisses Barres de Almeida, Tjark Miener, David Paneque, Daniel Mazin, Tihomir Surić, Ruben Lopez-Coto, Kazuma Ishio, Masahiro Teshima, Jarred Gershon Green, Yating Chai, Kevin Schmidt, P. G. Prada Moroni, Ramon J. García López, Stefan Cikota, Matteo Cerruti, Yusuke Suda, Irene Jiménez Martínez, Pawel Gliwny, Nicola Giglietto, Juan Abel Barrio, Narek Sahakyan, Carlo Vigorito, Ana Babić, Massimo Persic, Jelena Strišković, Marina Manganaro, Andrés Baquero, Jose Miguel Miranda, Victoria Moreno, Lena Linhoff, Saša Mićanović, Ivana Batković, Darko Zarić, Roberto Carosi, Daniel Morcuende, Carolin Wunderlich, Jose Luis Contreras, Elisa Prandini, Juan Cortina, Yasushi Fukazawa, Paolo Da Vela, Yuki Iwamura, Junko Kushida, Carlos Delgado Mendez, Karl Mannheim, Lovro Pavletić, Stefano Covino, Marie Karjalainen, David H. Green, Elena Moretti, Davide Miceli, Francesco Dazzi, Hendrik Bökenkamp, Daniela Dorner, Gaia Vanzo, Santiago Ubach, Konstancja Satalecka, Lorenzo Bellizzi, Alessia Spolon, Manuela Mallamaci, Ashot Chilingarian, Ievgen Vovk, Léa Jouvin, Michele Doro, Alessandro De Angelis, Dario Hrupec, M. I. Martínez, Michele Palatiello, Alicia López-Oramas, Giovanni Ceribella, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Stefano Menchiari, Ciro Bigongiari, Mitsunari Takahashi, Vassil Verguilov, Luca Tosti, Petar Temnikov, Sargis Gasparyan, Koji Noda, Wrijupan Bhattacharyya, Valerio D'Elia, Iva Šnidarić, Elisa Bernardini, Markus Garczarczyk, G. Maneva, Takashi Saito, Juliane van Scherpenberg, Wolfgang Rhode, Giovanni Busetto, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Shunsuke Sakurai, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Victor A. Acciari, Markus Gaug, and Moritz Hütten
Subjects: Physics, Crab Nebula, Astrophysics::High Energy Astrophysical Phenomena, Flux, Spectral energy distribution, MAGIC (telescope), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Blazar, Spectral line, Redshift, BL Lac object
Abstract: The high-peaked BL Lac object 1ES 0647+250 is one of the few distant blazars detected at very-high-energy (VHE, E>100 GeV) γ rays during non-flaring activity. Its redshift is still uncertain, with a recently proposed lower limit of z>0.29. This blazar was first detected by the MAGIC telescopes between 2009 and 2011 during its low state, displaying a flux of around 2% of the Crab Nebula above 100 GeV, but it has shown several periods of high activity, where the VHE γ-ray flux increased by more than one order of magnitude. The VHE spectra of four observed periods are characterized and the redshift of this source is estimated using the HE and VHE spectral shapes. The multi-wavelength data set collected from 2009 to 2020 introduced in this work will serve as the seed for further studies, including detailed studies of the broad-band spectral energy distribution for different activity levels and multi-band variability and correlation studies., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2022

10. Investigation of the correlation patterns and the Compton dominance variability of Mrk 421 in 2017

Author: Katsuaki Asano, I. Jiménez, A. Fuentes, C. M. Raiteri, D. Dominis Prester, E. Molina, E. Colombo, Y. V. Troitskaya, Nikola Godinovic, Sidika Merve Colak, Jenni Jormanainen, Yuki Iwamura, Alessandra Lamastra, Lab Saha, Antoniya Valcheva, Sunay Ibryamov, Elena G. Larionova, B. De Lotto, Evgeni Ovcharov, D. Zarić, Kazuma Ishio, David A. Green, M. Villata, D. Horan, Givi N. Kimeridze, Alexander Hahn, S. Nozaki, M. Perri, Michael D. Joner, D. Neise, S. Loporchio, R. J. García López, Marcello Giroletti, Victor A. Acciari, V. Fallah Ramazani, Tomohiko Oka, Daniela Dorner, Narek Sahakyan, J. Kushida, M. Kopp, Lorenzo Bellizzi, Noah Biederbeck, Joseph Moody, M. Gaug, L. Schneider, A. López-Oramas, Daniel Morcuende, N. Rizzi, Jose Luis Contreras, G. Vanzo, Rodolfo Carosi, L. Maraschi, Andrés Baquero, M. I. Carnerero, R. Iotov, Mosè Mariotti, A. Paravac, John Hoang, Ashwani Pandey, Z. R. Weaver, Francesco Longo, F. D'Ammando, S. Paiano, Elina Lindfors, Moritz Hütten, J. Herrera, Koji Noda, Abelardo Moralejo, Laura Eisenberger, E. Moretti, Julian Sitarek, Marcos López-Moya, Wlodek Bednarek, L. Di Venere, Ashot Chilingarian, U. Barres de Almeida, Elisa Bernardini, I. Agudo, M. Feige, R. Z. Ivanidze, O. A. Merkulova, D. Depaoli, M. Spencer, Massimo Persic, J. van Scherpenberg, Pratik Majumdar, L. Kunkel, K. Nishijima, Stefano Ansoldi, Juan Cortina, Kai Phillip Schmidt, A. Berti, Riccardo Paoletti, Saverio Lombardi, Daniel Mazin, M. V. Fonseca, Damir Lelas, R. J. C. Vera, Sanae Inoue, Giacomo D'Amico, Dominik Baack, C. Perennes, A. A. Nikiforova, Yating Chai, Stefan Cikota, G. M. Madejski, A. Arbet Engels, Daniel Kerszberg, Manuel Artero, E. Do Souto Espiñeira, Tomislav Terzić, J. Becerra González, Martin Makariev, R. Mirzoyan, Yoshiki Ohtani, G. A. Borman, Pawel Gliwny, Jose Miguel Miranda, A. De Angelis, Vitaly Neustroev, Wara Chamani, Oscar Blanch, T. S. Grishina, Martin Will, M. Vazquez Acosta, Nicola Giglietto, L. V. Larionova, Lea Heckmann, Francesco Gabriele Saturni, Jorge Otero-Santos, R. A. Chigladze, M. Balbo, N. Marchili, D. Hadasch, P. G. Prada Moroni, A. A. Vasilyev, M. G. Nikolashvili, Jordi Delgado, V. Ramakrishnan, Christian Fruck, G. Busetto, Victoria Moreno, Luca Tosti, A. Rugliancich, C. Nigro, Marina Manganaro, Valeri M. Larionov, M. Balokovic, Manuel Delfino, A. Strigachev, J. M. Paredes, Manash R. Samal, Stefano Covino, I. Vovk, H. C. Lin, Ž. Bošnjak, Stefano Menchiari, Rumen Bachev, Marc Ribó, Dorota Sobczyńska, Carolin Wunderlich, Bernd Schleicher, M. Minev, Antonio Stamerra, Maria-Isabel Bernardos, I. S. Troitskiy, Merja Tornikoski, E. N. Kopatskaya, Shunsuke Sakurai, Camilla Maggio, Chiara Righi, F. Verrecchia, P. Temnikov, S. G. Jorstad, T. Schweizer, Hidetoshi Kubo, Lluis Font, A. Y. Lien, Toshiaki Inada, A. Scherbantin, Lorand A. Sigua, G. Maneva, Stefano Truzzi, B. Machado de Oliveira Fraga, V. Bozhilov, M. Palatiello, Alessandro Marchini, Chaitanya Priyadarshi, Alessia Spolon, Léa Jouvin, Konstancja Satalecka, Tomoki Saito, Giovanni Ceribella, Michele Doro, S. O. Kurtanidze, Carlo Vigorito, Pablo Peñil, D. Strom, Giacomo Bonnoli, Adrian Biland, Ana Babić, Alicia Fattorini, D. Hildebrand, Satoshi Fukami, G. Ferrara, Y. Kajiwara, Matteo Cerruti, P. Da Vela, Vassil Verguilov, Lovro Pavletić, C. Delgado Mendez, Emilia Järvelä, S. Mićanović, Sergey S. Savchenko, Ivica Puljak, M. Noethe, Simone Mender, Francesco Dazzi, V. Vitale, Manuela Mallamaci, Ivana Batković, F. Leone, M. I. Martínez, J. Rico, Alan P. Marscher, C. Lorey, S. Ventura, Tjark Miener, Anne Lähteenmäki, David Paneque, Masahiro Teshima, Jarred Gershon Green, Wrijupan Bhattacharyya, Kari Nilsson, R. Walter, M. Strzys, D. Reinhart, E. Zaharieva, Wen Ping Chen, Vitalii Sliusar, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Thomas Bretz, J. Buss, Alok C. Gupta, Simona Righini, O. M. Kurtanidze, Ciro Bigongiari, O. Vince, D. Elsaesser, C. Leto, M. Garczarczyk, Sargis Gasparyan, J. Kania, Dario Hrupec, R. López-Coto, Wolfgang Rhode, I. Snidaric, D. A. Morozova, Vladimir A. Hagen-Thorn, Mitsunari Takahashi, J. A. Acosta-Pulido, E. Prandini, Marie Karjalainen, D. Miceli, Goran Damljanović, Evgeni Semkov, Alice Donini, L. A. Antonelli, J. A. Barrio, Y. Suda, D. Carosati, V. D'Elia, Fabrizio Tavecchio, A. C. Sadun, Tihomir Surić, C. Casadio, Karl Mannheim, Santiago Ubach, Y. Kobayashi, F. Di Pierro, European Commission, European Research Council, Ministerio de Ciencia e Innovación (España), Generalitat de Catalunya, Federal Ministry of Education and Research (Germany), German Research Foundation, Swiss National Science Foundation, Croatian Science Foundation, Ministry of Education, Science and Technological Development (Serbia), Bulgarian National Science Fund, National Aeronautics and Space Administration (US), Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Babi??, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batkovi??, I., Becerra Gonz??lez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Blanch, O., Bo??njak, ??., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D???amico, G., D???elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espi??eira, E., Dominis Prester, D., Donini, A., Doro, M., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garc??a L??pez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovi??, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., H??tten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jim??nez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., L??pez-Coto, R., L??pez-Moya, M., L??pez-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Mart??nez, M., Mazin, D., Menchiari, S., Mender, S., Mi??anovi??, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavleti??, L., Pe??il, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Rib??, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., nidari??, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suri??, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzi??, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zari??, D., Baack, D., Balbo, M., Biederbeck, N., Biland, A., Bretz, T., Buss, J., Dorner, D., Eisenberger, L., Elsaesser, D., Hildebrand, D., Iotov, R., Mannheim, K., Neise, D., Noethe, M., Paravac, A., Rhode, W., Schleicher, B., Sliusar, V., Walter, R., D???ammando, F., Horan, D., Lien, A. Y., Balokovi??, M., Madejski, G. M., Perri, M., Verrecchia, F., Leto, C., L??hteenm??ki, A., Tornikoski, M., Ramakrishnan, V., J??rvel??, E., Vera, R. J. C., Chamani, W., Villata, M., Raiteri, C. M., Gupta, A. C., Pandey, A., Fuentes, A., Agudo, I., Casadio, C., Semkov, E., Ibryamov, S., Marchini, A., Bachev, R., Strigachev, A., Ovcharov, E., Bozhilov, V., Valcheva, A., Zaharieva, E., Damljanovic, G., Vince, O., Larionov, V. M., Borman, G. A., Grishina, T. S., Hagen-Thorn, V. A., Kopatskaya, E. N., Larionova, E. G., Larionova, L. V., Morozova, D. A., Nikiforova, A. A., Savchenko, S. S., Troitskiy, I. S., Troitskaya, Y. V., Vasilyev, A. A., Merkulova, O. A., Chen, W. P., Samal, M., Lin, H. C., Moody, J. W., Sadun, A. C., Jorstad, S. G., Marscher, A. P., Weaver, Z. R., Feige, M., Kania, J., Kopp, M., Kunkel, L., Reinhart, D., Scherbantin, A., Schneider, L., Lorey, C., Acosta-Pulido, J. A., Carnerero, M. I., Carosati, D., Kurtanidze, S. O., Kurtanidze, O. M., Nikolashvili, M. G., Chigladze, R. A., Ivanidze, R. Z., Kimeridze, G. N., Sigua, L. A., Joner, M. D., Spencer, M., Giroletti, M., Marchili, N., Righini, S., Rizzi, N., Bonnoli, G., Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), MAGIC, FACT, Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: electron, PARTICLE-ACCELERATION, ELECTRON ACCELERATION, Radiation mechanisms: non-thermal, RAY, VHE [gamma ray], galaxies: active, BL Lacertae objects: individual: Mrk 421, radiation mechanisms: non-thermal, Electron, Astrophysics, GeV, 01 natural sciences, 7. Clean energy, LARGE-AREA TELESCOPE, law.invention, OBSERVATIONS, law, ultraviolet, optical, MAGIC (telescope), correlation [flux], 010303 astronomy & astrophysics, X-ray: flux, model: leptonic, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), BL-LACERTAE, individual: Mrk 421 [BL Lacertae objects], flux [X-ray], Gamma ray, flux: correlation, Galaxies: active, non-thermal [radiation mechanisms], Synchrotron, SWIFT OBSERVATIONS, active [galaxies], Spectral energy distribution, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, Lorentz, Flare, LOG-PARABOLIC SPECTRA, ACTIVE GALACTIC NUCLEI, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, radiation, mechanisms: non-thermal, LIGHT CURVES, X-RAY, MULTIWAVELENGTH, GLAST, leptonic [model], blazar, 0103 physical sciences, TeV, Blazar, 010308 nuclear & particles physics, Astronomy and Astrophysics, MAGIC, gamma ray: VHE, Space and Planetary Science, ddc:520, spectral, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Fermi Gamma-ray Space Telescope
Abstract: Full list of authors: Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; Arbet Engels, A.; Artero, M.; Asano, K.; Babić, A.; Baquero, A.; Barres de Almeida, U.; Barrio, J. A.; Batković, I.; Becerra González, J.; Bednarek, W.; Bellizzi, L.; Bernardini, E.; Bernardos, M.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Blanch, O.; Bošnjak, Ž.; Busetto, G.; Carosi, R.; Ceribella, G.; Cerruti, M.; Chai, Y.; Chilingarian, A.; Cikota, S.; Colak, S. M.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; di Pierro, F.; di Venere, L.; Do Souto Espiñeira, E.; Dominis Prester, D.; Donini, A.; Doro, M.; Fallah Ramazani, V.; Fattorini, A.; Ferrara, G.; Fonseca, M. V.; Font, L.; Fruck, C.; Fukami, S.; García López, R. J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Green, J. G.; Green, D.; Hadasch, D.; Hahn, A.; Heckmann, L.; Herrera, J.; Hoang, J.; Hrupec, D.; Hütten, M.; Inada, T.; Inoue, S.; Ishio, K.; Iwamura, Y.; Jiménez, I.; Jormanainen, J.; Jouvin, L.; Kajiwara, Y.; Karjalainen, M.; Kerszberg, D.; Kobayashi, Y.; Kubo, H.; Kushida, J.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Machado de Oliveira Fraga, B.; Maggio, C.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Menchiari, S.; Mender, S.; Mićanović, S.; Miceli, D.; Miener, T.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Morcuende, D.; Moreno, V.; Moretti, E.; Neustroev, V.; Nigro, C.; Nilsson, K.; Nishijima, K.; Noda, K.; Nozaki, S.; Ohtani, Y.; Oka, T.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletić, L.; Peñil, P.; Perennes, C.; Persic, M.; Prada Moroni, P. G.; Prandini, E.; Priyadarshi, C.; Puljak, I.; Ribó, M.; Rico, J.; Righi, C.; Rugliancich, A.; Saha, L.; Sahakyan, N.; Saito, T.; Sakurai, S.; Satalecka, K.; Saturni, F. G.; Schmidt, K.; Schweizer, T.; Sitarek, J.; Šnidarić, I.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strom, D.; Strzys, M.; Suda, Y.; Surić, T.; Takahashi, M.; Tavecchio, F.; Temnikov, P.; Terzić, T.; Teshima, M.; Tosti, L.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Vigorito, C. F.; Vitale, V.; Vovk, I.; Will, M.; Wunderlich, C.; Zarić, D.; Baack, D.; Balbo, M.; Biederbeck, N.; Biland, A.; Bretz, T.; Buss, J.; Dorner, D.; Eisenberger, L.; Elsaesser, D.; Hildebrand, D.; Iotov, R.; Mannheim, K.; Neise, D.; Noethe, M.; Paravac, A.; Rhode, W.; Schleicher, B.; Sliusar, V.; Walter, R.; D'Ammando, F.; Horan, D.; Lien, A. Y.; Baloković, M.; Madejski, G. M.; Perri, M.; Verrecchia, F.; Leto, C.; Lähteenmäki, A.; Tornikoski, M.; Ramakrishnan, V.; Järvelä, E.; Vera, R. J. C.; Chamani, W.; Villata, M.; Raiteri, C. M.; Gupta, A. C.; Pandey, A.; Fuentes, A.; Agudo, I.; Casadio, C.; Semkov, E.; Ibryamov, S.; Marchini, A.; Bachev, R.; Strigachev, A.; Ovcharov, E.; Bozhilov, V.; Valcheva, A.; Zaharieva, E.; Damljanovic, G.; Vince, O.; Larionov, V. M.; Borman, G. A.; Grishina, T. S.; Hagen-Thorn, V. A.; Kopatskaya, E. N.; Larionova, E. G.; Larionova, L. V.; Morozova, D. A.; Nikiforova, A. A.; Savchenko, S. S.; Troitskiy, I. S.; Troitskaya, Y. V.; Vasilyev, A. A.; Merkulova, O. A.; Chen, W. P; Samal, M.; Lin, H. C.; Moody, J. W.; Sadun, A. C.; Jorstad, S. G.; Marscher, A. P.; Weaver, Z. R.; Feige, M.; Kania, J.; Kopp, M.; Kunkel, L.; Reinhart, D.; Scherbantin, A.; Schneider, L.; Lorey, C.; Acosta-Pulido, J. A.; Carnerero, M. I.; Carosati, D.; Kurtanidze, S. O.; Kurtanidze, O. M.; Nikolashvili, M. G.; Chigladze, R. A.; Ivanidze, R. Z.; Kimeridze, G. N.; Sigua, L. A.; Joner, M. D.; Spencer, M.; Giroletti, M.; Marchili, N.; Righini, S.; Rizzi, N.; Bonnoli, G.; MAGIC Collaboration; Fact Collaboration.-- This is an Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited., Aims. We present a detailed characterisation and theoretical interpretation of the broadband emission of the paradigmatic TeV blazar Mrk 421, with a special focus on the multi-band flux correlations. Methods. The dataset has been collected through an extensive multi-wavelength campaign organised between 2016 December and 2017 June. The instruments involved are MAGIC, FACT, Fermi-LAT, Swift, GASP-WEBT, OVRO, Medicina, and Metsahovi. Additionally, four deep exposures (several hours long) with simultaneous MAGIC and NuSTAR observations allowed a precise measurement of the falling segments of the two spectral components. Results. The very-high-energy (VHE; E 100 GeV) gamma rays and X-rays are positively correlated at zero time lag, but the strength and characteristics of the correlation change substantially across the various energy bands probed. The VHE versus X-ray fluxes follow dierent patterns, partly due to substantial changes in the Compton dominance for a few days without a simultaneous increase in the X-ray flux (i.e., orphan gamma-ray activity). Studying the broadband spectral energy distribution (SED) during the days including NuSTAR observations, we show that these changes can be explained within a one-zone leptonic model with a blob that increases its size over time. The peak frequency of the synchrotron bump varies by two orders of magnitude throughout the campaign. Our multi-band correlation study also hints at an anti-correlation between UV-optical and X-ray at a significance higher than 3. A VHE flare observed on MJD 57788 (2017 February 4) shows gamma-ray variability on multi-hour timescales, with a factor ten increase in the TeV flux but only a moderate increase in the keV flux. The related broadband SED is better described by a two-zone leptonic scenario rather than by a one-zone scenario.We find that the flare can be produced by the appearance of a compact second blob populated by high energetic electrons spanning a narrow range of Lorentz factors, from 0 min = 2104 to 0 max = 6105. © 2021 Georg Thieme Verlag. All rights reserved., The MAGIC Collaboration would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF, MPG and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovación (MICINN) (FPA2017-87859-P, FPA2017-85668-P, FPA2017-82729-C6-5-R, FPA2017-90566-REDC, PID2019-104114RB-C31, PID2019-104114RB-C32, PID2019-105510GB-C31,PID2019-107847RB-C41, PID2019-107847RB-C42, PID2019-107847RB-C44, PID2019-107988GB-C22); the Indian Department of Atomic Energy; the Japanese ICRR, the University of Tokyo, JSPS, and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-268/16.12.2019 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588, SEV-2017-0709 and CEX2019-000920-S, and “María de Maeztu” CEX2019-000918-M, the Unidad de Excelencia “María de Maeztu” MDM-2015-0509-18-2 and the “la Caixa” Foundation (fellowship LCF/BQ/PI18/11630012) and by the CERCA program of the Generalitat de Catalunya; by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02; by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3; the Polish National Research Centre grant UMO-2016/22/M/ST9/00382; and by the Brazilian MCTIC, CNPq and FAPERJ. The important contributions from ETH Zurich grants ETH-10.08-2 and ETH-27.12-1 as well as the funding by the Swiss SNF and the German BMBF (Verbundforschung Astro- und Astroteilchenphysik) and HAP (Helmoltz Alliance for Astroparticle Physics) are gratefully acknowledged. Part of this work is supported by Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Center SFB 876 “Providing Information by Resource-Constrained Analysis”, project C3. We are thankful for the very valuable contributions from E. Lorenz, D. Renker and G. Viertel during the early phase of the project. We thank the Instituto de Astrofísica de Canarias for allowing us to operate the telescope at the Observatorio del Roque de los Muchachos in La Palma, the Max-Planck-Institut für Physik for providing us with the mount of the former HEGRA CT3 telescope, and the MAGIC collaboration for their support. The Fermi LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat à l’Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d’Études Spatiales in France. This work performed in part under DOE Contract DE-AC02-76SF00515. This work made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software, and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC; Italy) and the California Institute of Technology (USA). This research has also made use of the XRT Data Analysis Software (XRTDAS) developed under the responsibility of the ASI Science Data Center (ASDC), Italy. A.A.E and D.P acknowledge support from the Deutsche Forschungs gemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy – EXC-2094 – 390783311. M. B. acknowledges support from the YCAA Prize Postdoctoral Fellowship and from the Black Hole Initiative at Harvard University, which is funded in part by the Gordon and Betty Moore Foundation (grant GBMF8273) and in part by the John Templeton Foundation. This publication makes use of data obtained at the Metsähovi Radio Observatory, operated by Aalto University in Finland. This research has made use of data from the OVRO 40-m monitoring program (Richards et al. 2011) which is supported in part by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G and NSF grants AST-0808050 and AST-1109911. I.A. acknowledges financial support from the Spanish “Ministerio de Ciencia e Innovación” (MCINN) through the “Center of Excellence Severo Ochoa” award for the Instituto de Astrofísica de Andalucía-CSIC (SEV-2017-0709). Acquisition and reduction of the MAPCAT data was supported in part by MICINN through grants AYA2016-80889-P and PID2019-107847RB-C44. The MAPCAT observations were carried out at the German-Spanish Calar Alto Observatory, which is jointly operated by Junta de Andalucía and Consejo Superior de Investigaciones Científicas. C.C. acknowledges support from the European Research Council (ERC) under the European Union Horizon 2020 research and innovation program under the grant agreement No 771282. This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants KP-06-H28/3 (2018), KP-06-H38/4 (2019) and KP-06-KITAJ/2 (2020). We acknowledge support by Bulgarian National Science Fund under grant DN18-10/2017 and National RI Roadmap Projects DO1-277/16.12.2019 and DO1-268/16.12.2019 of the Ministry of Education and Science of the Republic of Bulgaria. This research was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (contract No 451-03-68/2020-14/200002). G.D. acknowledges observing grant support from the Institute of Astronomy and Rozhen NAO BAS through the bilateral joint research project “Gaia Celestial Reference Frame (CRF) and fast variable astronomical objects” (2020–2022, head – G. Damljanovic). The BU group was supported in part by NASA Fermi guest investigator program grants 80NSSC19K1505 and 80NSSC20K1566. This study was based in part on observations conducted using the 1.8 m Perkins Telescope Observatory (PTO) in Arizona, which is owned and operated by Boston University. This article is partly based on observations made with the LCOGT Telescopes, one of whose nodes is located at the Observatorios de Canarias del IAC on the island of Tenerife in the Observatorio del Teide. This article is also based partly on data obtained with the STELLA robotic telescopes in Tenerife, an AIP facility jointly operated by AIP and IAC. The Abastumani team acknowledges financial support by the Shota Rustaveli National Science Foundation under contract FR-19-6174. Based on observations with the Medicina telescope operated by INAF – Istituto di Radioastronomia.
Published: 2021

11. First detection of VHE gamma-ray emission from TXS 1515-273, study of its X-ray variability and spectral energy distribution

Author: M. I. Martínez, V. Neustroev, Francesco Longo, Maria-Isabel Bernardos, Alessandro Marchini, Alicia Fattorini, Tomohiko Oka, Katsuaki Asano, U. Barres de Almeida, Damir Lelas, Adrian Biland, D. Hadasch, D. Miceli, Sanae Inoue, Giacomo D'Amico, Yating Chai, Stefan Cikota, Pawel Gliwny, I. Vovk, David A. Green, R. J. García López, Narek Sahakyan, Stefano Covino, Lea Heckmann, Francesco Gabriele Saturni, J. Becerra González, Armin Nabizadeh, F. D'Ammando, J. Rico, M. Vazquez Acosta, Nicola Giglietto, Alexander Hahn, Nikola Godinovic, Dorota Sobczyńska, G. Ferrara, G. Busetto, E. Molina, Satoshi Fukami, Shunsuke Sakurai, Jarred Gershon Green, Elisabetta Bissaldi, C. Perennes, D. Strom, Yusuke Suda, E. Colombo, Lab Saha, Alice Donini, Kazuma Ishio, Massimo Persic, L. A. Antonelli, Martin Makariev, Dominik Baack, P. G. Prada Moroni, J. Kushida, Ivica Puljak, Victor Moreno, Oscar Blanch, S. Ventura, C. Nigro, Carlo Vigorito, F. Leone, D. Dominis Prester, Alessandra Lamastra, J. A. Barrio, John Hoang, V. Verguilov, Tomoki Saito, J. M. Paredes, Antonio Stamerra, Giovanni Ceribella, Rodolfo Carosi, I. Jiménez, V. D'Elia, Pratik Majumdar, M. V. Fonseca, Daniel Morcuende, Jose Luis Contreras, Jenni Jormanainen, Vincenzo Vitale, T. Schweizer, A. Arbet Engels, S. Loporchio, A. Rugliancich, Marina Manganaro, A. De Angelis, M. Karjalainen, Sargis Gasparyan, Stefano Menchiari, Y. Kajiwara, Fabrizio Tavecchio, M. Palatiello, Manuela Mallamaci, Masahiro Teshima, S. Paiano, Luca Tosti, I. Snidaric, Mosè Mariotti, Martin Will, M. Orienti, S. Mićanović, Ashot Chilingarian, Wolfgang Rhode, Lluis Font, B. Machado de Oliveira Fraga, Tihomir Surić, Manuel Artero, Juan Cortina, Toshiaki Inada, Yuki Iwamura, Stefano Truzzi, D. Zarić, Saverio Lombardi, Francesco Dazzi, Simone Mender, E. Do Souto Espiñeira, Tomislav Terzić, Dario Hrupec, Pablo Peñil, Konstancja Satalecka, L. Maraschi, Giacomo Bonnoli, Sidika Merve Colak, Elina Lindfors, Marcos López-Moya, G. Maneva, Karl Mannheim, Wlodek Bednarek, L. Di Venere, Mitsunari Takahashi, Michele Doro, J. van Scherpenberg, Stefano Ansoldi, Daniel Mazin, Riccardo Paoletti, Christian Fruck, Ivana Batković, E. Prandini, Wrijupan Bhattacharyya, Julian Sitarek, Santiago Ubach, Y. Kobayashi, F. Di Pierro, Jürgen Besenrieder, Lorenzo Bellizzi, Francesco Giordano, Antonio Tutone, J. Otero-Santos, K. Nishijima, Jose Miguel Miranda, Kai Phillip Schmidt, A. Berti, Yoshiki Ohtani, Tjark Miener, David Paneque, D. Elsaesser, Jordi Delgado, Ž. Bošnjak, Matteo Cerruti, Chiara Righi, V. Fallah Ramazani, V. A. Acciari, P. Temnikov, P. Da Vela, Manuel Delfino, Lovro Pavletić, Moritz Hütten, Chaitanya Priyadarshi, Carolin Wunderlich, Ana Babić, C. Delgado Mendez, M. Strzys, Kari Nilsson, Camilla Maggio, Daniela Dorner, Gaia Vanzo, M. Gaug, J. Herrera, Koji Noda, Elisa Bernardini, Alessia Spolon, Léa Jouvin, A. López-Oramas, S. Cutini, Daniel Kerszberg, Marc Ribó, B. De Lotto, S. Nozaki, Andrés Baquero, Hidetoshi Kubo, Abelardo Moralejo, E. Moretti, D. Depaoli, Bernd Schleicher, M. Minev, R. Mirzoyan, Ciro Bigongiari, M. Garczarczyk, R. López-Coto, German Research Foundation, Swiss National Science Foundation, Ministerio de Ciencia, Innovación y Universidades (España), Department of Atomic Energy (India), Institute for Cosmic Ray Research (Japan), University of Tokyo, Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Ministry of Education and Research (Romania), Academy of Finland, La Caixa, Croatian Science Foundation, University of Rijeka, Polish National Agency for Academic Exchange, European Commission, Ministerio de Economía y Competitividad (España), Istituto Nazionale di Astrofisica, Acciari, Va, Ansoldi, S, Antonelli, La, Engels, Aa, Artero, M, Asano, K, Baack, D, Babic, A, Baquero, A, de Almeida, Ub, Barrio, Ja, Batkovic, I, Gonzalez, Jb, Bednarek, W, Bellizzi, L, Bernardini, E, Bernardos, M, Berti, A, Besenrieder, J, Bhattacharyya, W, Bigongiari, C, Biland, A, Blanch, O, Bosnjak, Z, Busetto, G, Carosi, R, Ceribell, G, Cerruti, M, Chai, Y, Chilingarian, A, Cikota, S, Colak, Sm, Colombo, E, Contreras, Jl, Cortina, J, Covino, S, D'Amico, G, D'Elia, V, Da Vela, P, Dazzi, F, De Angelis, A, De Lotto, B, Delfino, M, Delgado, J, Mendez, Cd, Depaoli, D, Di Pierro, F, Di Venere, L, Espineira, Ed, Prester, Dd, Donini, A, Dorner, D, Doro, M, Elsaesser, D, Ramazani, Vf, Fattorini, A, Ferrara, G, Fonseca, Mv, Font, L, Fruck, C, Fukami, S, Lopez, Rjg, Garczarczyk, M, Gasparyan, S, Gaug, M, Giglietto, N, Giordano, F, Gliwny, P, Godinovic, N, Green, Jg, Green, D, Hadasch, D, Hahn, A, Heckmann, L, Herrera, J, Hoang, J, Hrupec, D, Hutten, M, Inada, T, Inoue, S, Ishio, K, Iwamura, Y, Jimenez, I, Jormanainen, J, Jouvin, L, Kajiwara, Y, Karjalainen, M, Kerszberg, D, Kobayashi, Y, Kubo, H, Kushida, J, Lamastra, A, Lelas, D, Leone, F, Lindfors, E, Lombardi, S, Longo, F, Lopez-Coto, R, Lopez-Moya, M, Lopez-Oramas, A, Loporchio, S, Fraga, Bmd, Maggio, C, Majumdar, P, Makariev, M, Mallamaci, M, Maneva, G, Manganaro, M, Mannheim, K, Maraschi, L, Mariotti, M, Martinez, M, Mazin, D, Menchiari, S, Mender, S, Micanovic, S, Miceli, D, Miener, T, Minev, M, Miranda, Jm, Mirzoyan, R, Molina, E, Moralejo, A, Morcuende, D, Moreno, V, Moretti, E, Neustroev, V, Nigro, C, Nilsson, K, Nishijima, K, Noda, K, Nozaki, S, Ohtani, Y, Oka, T, Otero-Santos, J, Paiano, S, Palatiello, M, Paneque, D, Paoletti, R, Paredes, Jm, Pavletic, L, Penil, P, Perennes, C, Moroni, Pgp, Prandini, E, Priyadarshi, C, Puljak, I, Rhode, W, Ribo, M, Rico, J, Righi, C, Rugliancich, A, Saha, L, Sahakyan, N, Saito, T, Sakurai, S, Satalecka, K, Saturni, Fg, Schleicher, B, Schmidt, K, Schweizer, T, Sitarek, J, Snidaric, I, Sobczynska, D, Spolon, A, Stamerra, A, Strom, D, Strzys, M, Suda, Y, Suric, T, Takahashi, M, Tavecchio, F, Temnikov, P, Terzic, T, Teshima, M, Tosti, L, Truzzi, S, Tutone, A, Ubach, S, Vanscherpenberg, J, Vanzo, G, Acosta, Mv, Ventura, S, Verguilov, V, Vigorito, Cf, Vitale, V, Vovk, I, Will, M, Wunderlich, C, Zaric, D, Bissaldi, E, Bonnoli, G, Cutini, S, D'Ammando, F, Nabizadeh, A, Marchini, A, and Orienti, M
Subjects: Photon, 010504 meteorology & atmospheric sciences, active [Galaxies], Radiation mechanisms: non-thermal, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, Objects: individual: TXS 1515–273, FOS: Physical sciences, Flux, Astrophysics, 01 natural sciences, 7. Clean energy, law.invention, law, objects: individual: TXS 1515-273, 0103 physical sciences, individual: TXS 1515-273 [Objects], MAGIC (telescope), Blazar, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, non-thermal [Radiation mechanisms], individual: TXS 1515–273 [objects], Gamma ray, Astronomy and Astrophysics, Synchrotron, Crab Nebula, Space and Planetary Science, ddc:520, Spectral energy distribution, Física nuclear, objects: individual: TXS 1515–273, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Full list of authors: Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; Arbet Engels, A. ; Artero, M.; Asano, K.; Baack, D.; Babić, A.; Baquero, A.; Barres de Almeida, U.; Barrio, J. A.; Batković, I.; Becerra González, J.; Bednarek, W.; Bellizzi, L.; Bernardini, E.; Bernardos, M.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Biland, A.; Blanch, O.; Bošnjak, Ž.; Busetto, G.; Carosi, R.; Ceribella, G.; Cerruti, M.; Chai, Y.; Chilingarian, A.; Cikota, S.; Colak, S. M.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; Pierro, F. Di; Venere, L. Di; Do Souto Espiñeira, E.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Elsaesser, D.; Fallah Ramazani, V.; Fattorini, A.; Ferrara, G.; Fonseca, M. V.; Font, L.; Fruck, C.; Fukami, S.; García López, R. J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Green, J. G.; Green, D.; Hadasch, D.; Hahn, A.; Heckmann, L.; Herrera, J.; Hoang, J.; Hrupec, D.; Hütten, M.; Inada, T.; Inoue, S.; Ishio, K.; Iwamura, Y.; Jiménez, I.; Jormanainen, J.; Jouvin, L.; Kajiwara, Y.; Karjalainen, M.; Kerszberg, D.; Kobayashi, Y.; Kubo, H.; Kushida, J.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Machado de Oliveira Fraga, B.; Maggio, C.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Menchiari, S.; Mender, S.; Mićanović, S.; Miceli, D.; Miener, T.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Morcuende, D.; Moreno, V.; Moretti, E.; Neustroev, V.; Nigro, C.; Nilsson, K.; Nishijima, K.; Noda, K.; Nozaki, S.; Ohtani, Y.; Oka, T.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletić, L.; Peñil, P.; Perennes, C.; Persic, M.; Prada Moroni, P. G.; Prandini, E.; Priyadarshi, C.; Puljak, I.; Rhode, W.; Ribó, M.; Rico, J.; Righi, C.; Rugliancich, A.; Saha, L.; Sahakyan, N.; Saito, T.; Sakurai, S.; Satalecka, K.; Saturni, F. G.; Schleicher, B.; Schmidt, K.; Schweizer, T.; Sitarek, J.; Šnidarić, I.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strom, D.; Strzys, M.; Suda, Y.; Surić, T.; Takahashi, M.; Tavecchio, F.; Temnikov, P.; Terzić, T.; Teshima, M.; Tosti, L.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Vigorito, C. F.; Vitale, V.; Vovk, I.; Will, M.; Wunderlich, C.; Zarić, D.; Bissaldi, E.; Bonnoli, G.; Cutini, S.; D'Ammando, F.; Nabizadeh, A.; Marchini, A.; Orienti, M.; MAGIC Collaboration., We report here on the first multiwavelength (MWL) campaign on the blazar TXS 1515-273, undertaken in 2019 and extending from radio to very-high-energy gamma-rays (VHE). Up until now, this blazar had not been the subject of any detailed MWL observations. It has a rather hard photon index at GeV energies and was considered a candidate extreme high-synchrotron-peaked source. MAGIC observations resulted in the first-time detection of the source in VHE with a statistical significance of 7.6σ. The average integral VHE flux of the source is 6 ± 1 per cent of the Crab nebula flux above 400 GeV. X-ray coverage was provided by Swift-XRT, XMM-Newton, and NuSTAR. The long continuous X-ray observations were separated by ∼9 h, both showing clear hour scale flares. In the XMM-Newton data, both the rise and decay time-scales are longer in the soft X-ray than in the hard X-ray band, indicating the presence of a particle cooling regime. The X-ray variability time-scales were used to constrain the size of the emission region and the strength of the magnetic field. The data allowed us to determine the synchrotron peak frequency and classify the source as a flaring high, but not extreme synchrotron-peaked object. Considering the constraints and variability patterns from the X-ray data, we model the broad-band spectral energy distribution. We applied a simple one-zone model, which could not reproduce the radio emission and the shape of the optical emission, and a two-component leptonic model with two interacting components, enabling us to reproduce the emission from radio to VHE band. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society., The financial support of the German BMBF, MPG, and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovacion (MICINN) (FPA201787859-P, FPA2017-85668-P, FPA2017-82729-C6-5-R, FPA201790566-REDC, PID2019-104114RB-C31, PID2019-104114RB-C32, PID2019-105510GB-C31, PID2019-107847RB-C41, PID2019107847RB-C42, PID2019-107847RB-C44, PID2019-107988GBC22); the Indian Department of Atomic Energy; the Japanese ICRR, the University of Tokyo, JSPS, and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1268/16.12.2019 and the Academy of Finland grant nr. 317637 and 320045 are gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia `Severo Ochoa' SEV-20160588, SEV-2017-0709 and CEX2019-000920-S, and `Maria de Maeztu' CEX2019-000918-M, the Unidad de Excelencia `Maria de Maeztu' MDM-2015-0509-18-2 and the `la Caixa' Foundation (fellowshipLCF/BQ/PI18/11630012), by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq, and FAPERJ. The Fermi-LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, theCommissariat à l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase from the following agencies is also gratefully acknowledged: the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France.
Published: 2021

12. MAGIC detection of Geminga: an Inverse Compton tail?

Author: Daniela Dorner, Gaia Vanzo, Louis Antonelli, Giacomo D'Amico, Carolin Wunderlich, Juliane van Scherpenberg, Katsuaki Asano, Mosè Mariotti, Juan Abel Barrio, Petar Temnikov, Jarred Gershon Green, Koji Noda, Serena Loporchio, Narek Sahakyan, Elisa Bernardini, D. Dominis Prester, Jenni Jormanainen, Bernardo Machado de Oliveira Fraga, Maria Victoria Fonseca, Manuel Artero, L. Maraschi, Elina Lindfors, Santiago Ubach, Massimo Persic, Alice Donini, Carlos Delgado Mendez, Daniel Mazin, Alexander Hahn, Marina Manganaro, Saverio Lombardi, Marine Pihet, Nikola Godinovic, Alessio Berti, Ievgen Vovk, Lara Nava, Wrijupan Bhattacharyya, Tomislav Terzić, Andrea Rugliancich, Elena Moretti, Fabrizio Tavecchio, Chiara Righi, Davide Depaoli, Axel Arbet Engels, Eduardo Colombo, Daniel Morcuende, Jose Luis Contreras, Takeshi Nakamori, Jordi Delgado, Giacomo Bonnoli, Tihomir Surić, P. G. Prada Moroni, M. I. Martínez, Pratik Majumdar, Juan Cortina, Barbara De Lotto, Konstancja Satalecka, Markus Garczarczyk, Michele Doro, Marie Karjalainen, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Josefa González, Chaitanya Priyadarshi, Leonardo Di Venere, Camilla Maggio, Martin Will, Victor A. Acciari, Kevin Schmidt, Lena Linhoff, Karl Mannheim, Stefano Menchiari, Jorge Otero-Santos, John Hoang, Hendrik Bökenkamp, Luca Tosti, Shunsuke Sakurai, Satoshi Fukami, Vandad Fallah Ramazani, Takashi Saito, Stefano Truzzi, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Francesco Dazzi, Michele Palatiello, Alicia López-Oramas, Seiya Nozaki, Josep M. Paredes, Moritz Hütten, Matteo Cerruti, Pablo Peñil, Valerio D'Elia, Stefano Covino, Masahiro Teshima, Dominik Baack, Antonio Stamerra, Junko Kushida, Saša Mićanović, G. Maneva, Lluis Font, Lovro Pavletić, Cosimo Nigro, Ivana Batković, Yasushi Fukazawa, Roberto Carosi, Sofia Ventura, Francesco Longo, Adrian Biland, Kazuma Ishio, Maria-Isabel Bernardos, Ivica Puljak, Sidika Merve Colak, Iva Šnidarić, Monica Vazquez Acosta, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Yukiho Kobayashi, Davide Miceli, Giovanni Ceribella, Julian Sitarek, Yusuke Suda, Elisa Prandini, Marcel Strzys, Simona Paiano, Alessia Spolon, Léa Jouvin, Alicia Fattorini, Christian Fruck, Ramon J. García López, Daniela Hadasch, Sargis Gasparyan, Manuela Mallamaci, Carlo Vigorito, Elia Do Souto Espiñeira, Ashot Chilingarian, Simone Mender, Javier Herrera, Alessandro De Angelis, Wolfgang Rhode, Giovanni Busetto, Yoshiki Ohtani, Manuel Delfino, Ulisses Barres de Almeida, Vassil Verguilov, Lorenzo Bellizzi, Tomohiko Oka, Kyoshi Nishijima, Ana Babić, Daniel Kerszberg, Martin Makariev, Oscar Blanch, Dominik Elsaesser, Razmik Mirzoyan, Tjark Miener, David Paneque, Yuki Iwamura, Yating Chai, Damir Lelas, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, Marc Ribó, Lea Heckmann, Francesco Gabriele Saturni, Jelena Strišković, Victoria Moreno, Darko Zarić, Dorota Sobczyńska, Hidetoshi Kubo, Tomohiro Inada, Zeljka Bosnjak, Andrés Baquero, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Ciro Bigongiari, Abelardo Moralejo, Bernd Schleicher, Edgar Molina, Dario Hrupec, Mitsunari Takahashi, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Paolo Da Vela, David H. Green, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Irene Jiménez Martínez, and Jose Miguel Miranda
Subjects: Physics, Range (particle radiation), Pulsar, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Inverse, MAGIC (telescope), Astrophysics, Radiation, Curvature, Vela
Abstract: We report the detection of pulsed emission from the Geminga pulsar (PSR J0633+1746) with the MAGIC Telescopes. After the Crab and Vela pulsars, Geminga is the third one detected in the very high energy domain, and its estimated age of ~340 ky makes it the oldest one. The spectrum derived by MAGIC extends from ~15 GeV to 75 GeV and can be well modeled with a simple, soft power-law function. For energies below 40 GeV it overlaps with Fermi-LAT measurements. Joint fits to MAGIC and Fermi-LAT data disfavour the existence of a sub-exponential cut-off in this energy range. Our results are discussed in the framework of the outer gap accelerator model. Such power-law emission can be interpreted as the transition from curvature radiation to inverse Compton (IC) scattering of charges accelerated in the northern outer gap. The IC component is expected to continue towards higher energies. The model fails to fit the overall shape of the spectrum, indicating that a major review is required. The MAGIC Telescopes are two IACTs on the Canary Island of La Palma. In recent years they have significantly improved their performance below 100 GeV with the introduction of a novel trigger system, the Sum-Trigger-II, which halves the energy threshold of the system.
Published: 2021

13. Shedding light on the highest energy emission from GRBs with MAGIC observations

Author: Adrian Biland, Chiara Righi, D. Dominis Prester, Jenni Jormanainen, Tomohiko Oka, Tjark Miener, Chaitanya Priyadarshi, Bernardo Machado de Oliveira Fraga, Sargis Gasparyan, Dominik Elsaesser, Razmik Mirzoyan, David Paneque, Wolfgang Rhode, Damir Lelas, Jordi Delgado, Kyoshi Nishijima, Pratik Majumdar, Lea Heckmann, Giovanni Busetto, Daniela Dorner, Francesco Gabriele Saturni, Kevin Schmidt, Jelena Strišković, Dorota Sobczyńska, Zeljka Bosnjak, Yusuke Suda, Satoshi Fukami, Andrés Baquero, Julian Sitarek, Marina Manganaro, Daniela Hadasch, Yoshiki Ohtani, Carlo Vigorito, Martin Will, Junko Kushida, Gaia Vanzo, Ivica Puljak, Jorge Otero-Santos, Lovro Pavletić, Masahiro Teshima, Javier Rico, Tokonatsu Yamamoto, Kazuma Ishio, Seiya Nozaki, Elena Moretti, Ramon J. García López, Francesco Longo, Katsuaki Asano, Ciro Bigongiari, Vitaly Neustroev, Christian Fruck, Lena Linhoff, Daniel Morcuende, Jose Luis Contreras, Serena Loporchio, Wrijupan Bhattacharyya, Konstancja Satalecka, Michele Doro, M. I. Martínez, Santiago Ubach, Luca Tosti, Maria Victoria Fonseca, Juan Cortina, Petar Temnikov, Koji Noda, Juan Abel Barrio, Manuel Artero, Elisa Bernardini, Alexander Hahn, Abelardo Moralejo, Marie Karjalainen, Valerio D'Elia, Elisa Prandini, Narek Sahakyan, Nikola Godinovic, Tomislav Terzić, Louis Antonelli, Marine Pihet, Michele Palatiello, Manuela Mallamaci, Davide Depaoli, Bernd Schleicher, Hendrik Bökenkamp, Carlos Delgado Mendez, Alessandro De Angelis, G. Maneva, Edgar Molina, Carolin Wunderlich, Elia Do Souto Espiñeira, Daniel Kerszberg, Takashi Saito, Alice Donini, Leonardo Di Venere, Iva Šnidarić, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Victor A. Acciari, John Hoang, Dominik Baack, Matteo Cerruti, Ashot Chilingarian, Moritz Hütten, Lara Nava, Yukiho Kobayashi, Fabrizio Tavecchio, Eduardo Colombo, Takeshi Nakamori, Ryuji Takeishi, Barbara De Lotto, Martin Makariev, D. M. Strom, Kari Nilsson, Yuki Iwamura, Camilla Maggio, Mosè Mariotti, Oscar Blanch, Yasushi Fukazawa, Manuel Delfino, Ulisses Barres de Almeida, Ana Babić, Markus Garczarczyk, Saverio Lombardi, Josefa González, Juliane van Scherpenberg, Andrea Rugliancich, Alessandra Lamastra, Ievgen Vovk, Marc Ribó, Stefano Menchiari, Hidetoshi Kubo, Vincenzo Vitale, Tomohiro Inada, Maria-Isabel Bernardos, Francesco Leone, Simona Paiano, Alicia Fattorini, Massimo Persic, Roberto Carosi, Paolo Da Vela, Lluis Font, Giacomo Bonnoli, David H. Green, Davide Miceli, P. G. Prada Moroni, Marcel Strzys, Francesco Dazzi, Alessia Spolon, Léa Jouvin, Simone Mender, Javier Herrera, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Vassil Verguilov, Ruben Lopez-Coto, Irene Jiménez Martínez, Jose Miguel Miranda, Tihomir Surić, Yating Chai, Karl Mannheim, Stefan Cikota, Alicia López-Oramas, Pawel Gliwny, Nicola Giglietto, Cosimo Nigro, Sofia Ventura, Victoria Moreno, Darko Zarić, Alessio Berti, Axel Arbet Engels, Stefano Covino, Giovanni Ceribella, L. Maraschi, Elina Lindfors, Daniel Mazin, Sidika Merve Colak, Monica Vazquez Acosta, Giacomo D'Amico, Lorenzo Bellizzi, Jarred Gershon Green, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Dario Hrupec, Mitsunari Takahashi, Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Stefano Truzzi, Pablo Peñil, Saša Mićanović, Ivana Batković, Susume Inoue, and Shunsuke Sakurai
Subjects: Physics, High energy, Experimental proof, Orders of magnitude (time), Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, MAGIC (telescope), Gamma-ray burst, Energy (signal processing), Cherenkov radiation, Afterglow
Abstract: On 14th January 2019, the MAGIC collaboration achieved the first significant detection at TeV energies of a gamma-ray burst (GRB), namely GRB 190114C. This observation sets the first experimental proof of very high energy (VHE, >~100 GeV) gamma-ray emission in GRBs, after more than 50 years from the first GRB detection and many searches with Cherenkov telescopes in the last decades. The data collected by MAGIC and by more than 20 other ground-based and space-borne instruments, spanning 17 orders of magnitude in energy, revealed a new GeV-TeV emission component in the GRB afterglow. This unprecedented multi-wavelength dataset, including VHE data for the first time, allowed a detailed study of the broadband emission. A one-zone synchrotron-self Compton scenario with internal $\gamma$-$\gamma$ absorption could be used to describe the broadband emission, using parameters compatible with those found in previous studies of GRB afterglows below the GeV energy range. This detection opened a new era in the studies of GRBs, leading to new questions such as the universality of TeV emission in different types of GRBs. In this contribution, we will present the GRB follow-up program performed by the MAGIC collaboration, which started more than 15 years ago. We will highlight the results on GRB 190114C, discuss the implications for GRB physics, and report the latest developments and the prospects for future observations of GRBs with the MAGIC telescopes.
Published: 2021

14. Upper limits on the WIMP annihilation cross section from a joint analysis of dwarf spheroidal satellite galaxy observations with the MAGIC telescopes

Author: Maria-Isabel Bernardos, Lena Linhoff, Simona Paiano, Alice Donini, Alicia Fattorini, Takashi Saito, M. I. Martínez, L. Maraschi, Daniela Dorner, Francesco Dazzi, Daniel Kerszberg, Ryuji Takeishi, Elina Lindfors, Lara Nava, Yating Chai, Francesco Longo, Gaia Vanzo, D. M. Strom, Dominik Baack, Dario Hrupec, Stefan Cikota, Pawel Gliwny, Stefano Menchiari, Daniel Mazin, D. Dominis Prester, Kari Nilsson, Nicola Giglietto, Chiara Righi, John Hoang, Mosè Mariotti, Fabrizio Tavecchio, Juliane van Scherpenberg, Yukiho Kobayashi, Mitsunari Takahashi, Eduardo Colombo, Tjark Miener, Ciro Bigongiari, Jenni Jormanainen, Tihomir Surić, Christian Fruck, Javier Rico, Tokonatsu Yamamoto, David Paneque, Victoria Moreno, Vitaly Neustroev, Lluis Font, Elia Do Souto Espiñeira, Darko Zarić, Matteo Cerruti, Bernardo Machado de Oliveira Fraga, Stefano Covino, Petar Temnikov, Jelena Strišković, Chaitanya Priyadarshi, Manuela Mallamaci, Yasushi Fukazawa, Michele Palatiello, Koji Noda, Saverio Lombardi, Marc Ribó, Elisa Bernardini, Marcel Strzys, Alessandro De Angelis, Martin Makariev, Giacomo Bonnoli, Luca Tosti, Andrea Rugliancich, Manuel Delfino, Ievgen Vovk, P. G. Prada Moroni, Satoshi Fukami, Ulisses Barres de Almeida, Oscar Blanch, Markus Garczarczyk, Giovanni Ceribella, Iva Šnidarić, Simone Mender, Javier Herrera, Josefa González, Sargis Gasparyan, Marina Manganaro, Valerio D'Elia, Thomas Schweizer, Hidetoshi Kubo, Tomohiro Inada, Karl Mannheim, Andrés Baquero, Masahiro Teshima, Julian Sitarek, Sidika Merve Colak, Ana Babić, Katsuaki Asano, Elena Moretti, Tomohiko Oka, Louis Antonelli, Konstancja Satalecka, Alexander Hahn, Michele Doro, Abelardo Moralejo, Monica Vazquez Acosta, Daniela Hadasch, Yuki Iwamura, Alicia López-Oramas, Wolfgang Rhode, Stefano Ansoldi, Maria Victoria Fonseca, Giovanni Busetto, Serena Loporchio, Marine Pihet, G. Maneva, Daniel Morcuende, Jose Luis Contreras, Yoshiki Ohtani, Kyoshi Nishijima, Riccardo Paoletti, Markus Gaug, Stefano Truzzi, Kazuma Ishio, Juan Cortina, Santiago Ubach, Nikola Godinovic, Lorenzo Bellizzi, Jordi Delgado, Bernd Schleicher, Takeshi Nakamori, Adrian Biland, Edgar Molina, Marie Karjalainen, Barbara De Lotto, Hendrik Bökenkamp, Vandad Fallah Ramazani, Massimo Persic, Pablo Peñil, Josep M. Paredes, Antonio Stamerra, Camilla Maggio, Kevin Schmidt, Junko Kushida, Lovro Pavletić, Saša Mićanović, Ivana Batković, D. Ninci, Roberto Carosi, Cosimo Nigro, Davide Miceli, Alessia Spolon, Sofia Ventura, Giacomo D'Amico, Léa Jouvin, Carolin Wunderlich, Vassil Verguilov, Shunsuke Sakurai, Jarred Gershon Green, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Zeljka Bosnjak, Victor A. Acciari, Ivica Puljak, Moritz Hütten, Marcos López-Moya, Wlodek Bednarek, Federico Di Pierro, Ramon J. García López, Ruben Lopez-Coto, Irene Jiménez Martínez, Wrijupan Bhattacharyya, Jose Miguel Miranda, Alessandra Lamastra, Vincenzo Vitale, Alessio Berti, Pratik Majumdar, Yusuke Suda, Francesco Leone, Paolo Da Vela, Axel Arbet Engels, David H. Green, Martin Will, Jorge Otero-Santos, Carlo Vigorito, Seiya Nozaki, Juan Abel Barrio, Narek Sahakyan, Carlos Delgado Mendez, Davide Depaoli, Leonardo Di Venere, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Manuel Artero, Tomislav Terzić, Elisa Prandini, and Ashot Chilingarian
Subjects: Physics, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Coma (optics), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, Draco (constellation), WIMP, Satellite galaxy, MAGIC (telescope), Astrophysics::Galaxy Astrophysics, Cherenkov radiation
Abstract: Dwarf spheroidal galaxies (dSphs) are among the best candidates to perform indirect searches for DM, having the highest known mass-to-light ratio and being free of astrophysical gamma-ray emitting sources. The Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes, located on the Canary Island of La Palma, have observed a fair amount of optimal dSphs in the recent years. This is the outcome of diversifying the observation strategy in order to avoid possible biases in target selection and to improve previous results. In this contribution we will report on new MAGIC results obtained from 52.1 hours of observation of the Draco dSph in 2018 and 49.5 hours of the Coma Berenices dSph in 2019. We will also present the results of a joint analysis of Draco and Coma Berenices dSphs with other dSphs observed by MAGIC so far. The selected dataset accounts for 354.4 hours of good quality data, resulting in one of the largest dSphs samples ever collected by an array of Cherenkov telescopes. This allows us to derive the most constraining limits from dSphs, among Cherenkov telescopes, on the WIMP annihilation cross section for different annihilation channels in the WIMP mass range 70 GeV to 100 TeV.
Published: 2021

15. #meetTheMAGICians: Science communication and visibility of young researchers

Author: Thomas Schweizer, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Daniel Kerszberg, Dominik Elsaesser, Stefano Covino, Razmik Mirzoyan, Marcos López-Moya, Elia Do Souto Espiñeira, Jordi Delgado, Katsuaki Asano, Damir Lelas, Juan Abel Barrio, Wlodek Bednarek, Federico Di Pierro, D. Dominis Prester, Lea Heckmann, Francesco Gabriele Saturni, Maria Victoria Fonseca, Sargis Gasparyan, Chiara Righi, Dario Hrupec, Lena Linhoff, Narek Sahakyan, Ciro Bigongiari, Ruben Lopez-Coto, Daniel Morcuende, Jose Luis Contreras, Marc Ribó, Dorota Sobczyńska, Zeljka Bosnjak, Kevin Schmidt, Nikola Godinovic, Jenni Jormanainen, Wolfgang Rhode, Carlos Delgado Mendez, Juan Cortina, Martin Makariev, Serena Loporchio, Stefano Menchiari, Irene Jiménez Martínez, Bernardo Machado de Oliveira Fraga, Ivica Puljak, Giovanni Busetto, Mitsunari Takahashi, Takeshi Nakamori, Giovanni Ceribella, Oscar Blanch, Hidetoshi Kubo, Tomohiro Inada, Barbara De Lotto, Junko Kushida, Lovro Pavletić, Stefano Truzzi, Andrés Baquero, John Hoang, Cosimo Nigro, Camilla Maggio, Sidika Merve Colak, Yusuke Suda, Giacomo Bonnoli, Matteo Cerruti, M. I. Martínez, Daniela Dorner, Gaia Vanzo, Lluis Font, Abelardo Moralejo, Chaitanya Priyadarshi, Jose Miguel Miranda, Pablo Peñil, Ramon J. García López, Sofia Ventura, Hendrik Bökenkamp, Pratik Majumdar, Monica Vazquez Acosta, P. G. Prada Moroni, Carlo Vigorito, Martin Will, Satoshi Fukami, Yasushi Fukazawa, Paolo Da Vela, Petar Temnikov, Marcel Strzys, Koji Noda, Manuela Mallamaci, Jorge Otero-Santos, Bernd Schleicher, Edgar Molina, Louis Antonelli, Saša Mićanović, Elisa Bernardini, Simone Mender, Seiya Nozaki, Javier Herrera, L. Maraschi, Alessandro De Angelis, Elina Lindfors, David H. Green, Alexander Hahn, Marie Karjalainen, Tihomir Surić, Ivana Batković, Ryuji Takeishi, Maria-Isabel Bernardos, Alice Donini, D. M. Strom, Kari Nilsson, Julian Sitarek, Roberto Carosi, Daniel Mazin, Carolin Wunderlich, Manuel Artero, Marine Pihet, Daniela Hadasch, Juliane van Scherpenberg, Giacomo D'Amico, Masahiro Teshima, Lorenzo Bellizzi, Davide Miceli, Tomohiko Oka, Lara Nava, Simona Paiano, Massimo Persic, Alessia Spolon, Yoshiki Ohtani, Alicia Fattorini, Léa Jouvin, Karl Mannheim, Tomislav Terzić, Fabrizio Tavecchio, Ievgen Vovk, Davide Depaoli, Eduardo Colombo, Manuel Delfino, Ulisses Barres de Almeida, Vassil Verguilov, Yating Chai, Alicia López-Oramas, Kyoshi Nishijima, Jarred Gershon Green, Stefan Cikota, Pawel Gliwny, Javier Rico, Tokonatsu Yamamoto, Francesco Dazzi, Nicola Giglietto, Leonardo Di Venere, Ana Babić, Jürgen Besenrieder, Victoria Moreno, Francesco Giordano, Antonio Tutone, Vitaly Neustroev, Darko Zarić, Alessio Berti, Axel Arbet Engels, Luca Tosti, Victor A. Acciari, Santiago Ubach, Shunsuke Sakurai, Valerio D'Elia, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Moritz Hütten, G. Maneva, Mosè Mariotti, Adrian Biland, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Wrijupan Bhattacharyya, Saverio Lombardi, Andrea Rugliancich, Yuki Iwamura, Christian Fruck, Josefa González, Tjark Miener, David Paneque, Jelena Strišković, Michele Palatiello, Markus Garczarczyk, Kazuma Ishio, Iva Šnidarić, Elisa Prandini, Ashot Chilingarian, Marina Manganaro, Elena Moretti, Konstancja Satalecka, Michele Doro, and Francesco Longo
Subjects: Computer science, business.industry, Internet privacy, Visibility (geometry), Science communication, business
Published: 2021

16. Multiwavelength observations in 2019-2020 of a new very-high-energy gamma-ray emitter: the flat spectrum radio quasar QSO B1420+326

Author: Davide Depaoli, Davide Miceli, Alessia Spolon, Léa Jouvin, Leonardo Di Venere, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, John Hoang, Vassil Verguilov, Francesco Longo, Jordi Delgado, Vandad Fallah Ramazani, Josep M. Paredes, Alexander Hahn, Luca Tosti, Antonio Stamerra, Kevin Schmidt, Valerio D'Elia, Marine Pihet, Roberto Angioni, G. Maneva, Louis Antonelli, Massimo Persic, Alessio Berti, Giacomo D'Amico, Wrijupan Bhattacharyya, Junko Kushida, Carolin Wunderlich, D. Dominis Prester, Lovro Pavletić, Katsuaki Asano, Markus Garczarczyk, Yusuke Suda, Elia Do Souto Espiñeira, Abelardo Moralejo, Victor A. Acciari, Axel Arbet Engels, Jenni Jormanainen, Monica Orienti, Maria Victoria Fonseca, Moritz Hütten, Takashi Saito, Carlo Vigorito, Stefano Menchiari, Bernardo Machado de Oliveira Fraga, Maria-Isabel Bernardos, Daniela Dorner, Adrian Biland, Jarred Gershon Green, Kazuma Ishio, Gaia Vanzo, Yating Chai, Stefan Cikota, Nikola Godinovic, Alessandra Lamastra, Chiara Righi, Dominik Baack, Martin Makariev, Dario Hrupec, Oscar Blanch, Lena Linhoff, Michele Palatiello, Vincenzo Vitale, Roberto Carosi, Cosimo Nigro, Yukiho Kobayashi, Mitsunari Takahashi, Petar Temnikov, Pratik Majumdar, Elisa Prandini, Lluis Font, Koji Noda, Simona Paiano, Sofia Ventura, Alicia Fattorini, Pawel Gliwny, Nicola Giglietto, Elisa Bernardini, Daniel Kerszberg, Stefano Covino, Juliane van Scherpenberg, Francesco Leone, Chaitanya Priyadarshi, Dominik Elsaesser, Manuel Artero, Razmik Mirzoyan, Marcel Strzys, Martin Will, Jorge Otero-Santos, Julian Sitarek, Marcos López-Moya, Tomislav Terzić, Takeshi Nakamori, Ashot Chilingarian, Yuki Iwamura, Marc Ribó, Josefa González, Tihomir Surić, Wlodek Bednarek, Simone Mender, Javier Herrera, Damir Lelas, Barbara De Lotto, Federico Di Pierro, Daniela Hadasch, Ruben Lopez-Coto, Ievgen Vovk, Seiya Nozaki, Svetlana G. Jorstad, Iva Šnidarić, Camilla Maggio, Victoria Moreno, Hidetoshi Kubo, Tomohiro Inada, Irene Jiménez Martínez, Santiago Ubach, M. I. Martínez, Yoshiki Ohtani, Lea Heckmann, Christian Fruck, Francesco Gabriele Saturni, Jose Miguel Miranda, Bernd Schleicher, Darko Zarić, Karl Mannheim, Paolo Da Vela, Satoshi Fukami, David H. Green, Thomas Schweizer, Dorota Sobczyńska, Zeljka Bosnjak, Alicia López-Oramas, Stefano Ansoldi, Juan Abel Barrio, Edgar Molina, Narek Sahakyan, Masahiro Teshima, Shunsuke Sakurai, Riccardo Paoletti, Markus Gaug, Marina Manganaro, Giovanni Ceribella, Stefano Truzzi, Manuela Mallamaci, F. D'Ammando, Pablo Peñil, Alessandro De Angelis, Matteo Cerruti, Carlos Delgado Mendez, Saša Mićanović, Elena Moretti, Ivica Puljak, Ivana Batković, Giacomo Bonnoli, Konstancja Satalecka, P. G. Prada Moroni, Yasushi Fukazawa, Michele Doro, Tomohiko Oka, Kyoshi Nishijima, Sidika Merve Colak, Monica Vazquez Acosta, Sargis Gasparyan, Andrés Baquero, Ramon J. García López, Tjark Miener, David Paneque, Wolfgang Rhode, Francesco Dazzi, Giovanni Busetto, Jelena Strišković, L. Maraschi, Elina Lindfors, Lorenzo Bellizzi, Daniel Mazin, Ciro Bigongiari, Marie Karjalainen, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Daniel Morcuende, Jose Luis Contreras, Juan Cortina, Hendrik Bökenkamp, Serena Loporchio, Manuel Delfino, Ulisses Barres de Almeida, Alice Donini, Ana Babić, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Mosè Mariotti, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Quasar, Optical polarization, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, law.invention, Luminosity, law, Spectral energy distribution, Spectroscopy, Equivalent width, Astrophysics::Galaxy Astrophysics, Flare
Abstract: The flat-spectrum radio quasar QSO B1420+326 underwent an enhanced $\gamma$-ray flux state seen by Fermi-LAT at the turn of 2019/2020. Compared to the low state both the position and luminosity of the two spectral energy distribution peaks changed by at least two orders of magnitude. The high state resulted in the discovery of the very-high-energy (>100 GeV) $\gamma$-ray emission from the source by the MAGIC telescopes. The organized multiwavelength campaign allow us to trace the broadband emission of the source through different phases of the flaring activity. The source was observed by 20 instruments in radio, near-infrared, optical, ultra-violet, X-ray and $\gamma$-ray bands. We use dedicated optical spectroscopy results to estimate the accretion disc and the dust torus luminosity. The optical spectroscopy shows a prominent FeII bump with flux evolving together with the continuum emission and a MgII line with varying equivalent width. The $\gamma$-ray flare was accompanied by a rotation of the optical polarization vector and emission of a new superluminal radio knot. We model spectral energy distributions in different flare phases in the framework of combined synchrotron-self-Compton and external Compton scenario in which the shape of the electron energy distribution is determined from cooling processes.
Published: 2021

17. Very-high-energy gamma-ray emission from {GRB} 201216C detected by {MAGIC}

Author: Ramon J. García López, Marie Karjalainen, Alessio Berti, Takeshi Nakamori, Manuel Artero, Dominik Elsaesser, Razmik Mirzoyan, Damir Lelas, Barbara De Lotto, Lea Heckmann, Francesco Gabriele Saturni, Dorota Sobczyńska, Axel Arbet Engels, Manuel Delfino, Ulisses Barres de Almeida, Javier Rico, Tokonatsu Yamamoto, Camilla Maggio, Lorenzo Bellizzi, Lena Linhoff, Alice Donini, Juliane van Scherpenberg, Tomislav Terzić, Stefano Covino, Tihomir Surić, Dario Hrupec, D. Dominis Prester, Vitaly Neustroev, Daniela Dorner, Gaia Vanzo, Stefano Menchiari, Davide Depaoli, Mitsunari Takahashi, Pratik Majumdar, Kazuma Ishio, Luca Tosti, Chiara Righi, Ana Babić, Lara Nava, Martin Will, Jenni Jormanainen, Roberto Carosi, M. I. Martínez, Ciro Bigongiari, Valerio D'Elia, Alessandra Lamastra, Karl Mannheim, Katsuaki Asano, Yating Chai, Vincenzo Vitale, Jorge Otero-Santos, Francesco Longo, Shunsuke Sakurai, Petar Temnikov, Daniel Kerszberg, Fabrizio Tavecchio, Matteo Cerruti, Elisa Prandini, Bernardo Machado de Oliveira Fraga, G. Maneva, Chaitanya Priyadarshi, Stefan Cikota, Pawel Gliwny, Manuela Mallamaci, Nicola Giglietto, Eduardo Colombo, Seiya Nozaki, Koji Noda, Giovanni Ceribella, Elisa Bernardini, Daniel Morcuende, Jose Luis Contreras, Leonardo Di Venere, Alicia López-Oramas, Alessandro De Angelis, Maria Victoria Fonseca, Tjark Miener, Abelardo Moralejo, Sargis Gasparyan, Juan Cortina, Marc Ribó, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Yasushi Fukazawa, Victoria Moreno, David Paneque, Nikola Godinovic, Massimo Persic, Wolfgang Rhode, Francesco Leone, Giovanni Busetto, Adrian Biland, Santiago Ubach, Juan Abel Barrio, Narek Sahakyan, Elia Do Souto Espiñeira, Stefano Truzzi, Pablo Peñil, Ashot Chilingarian, Hidetoshi Kubo, Tomohiro Inada, Giacomo Bonnoli, Serena Loporchio, Hendrik Bökenkamp, Takashi Saito, Josefa González, John Hoang, Davide Miceli, Tomohiko Oka, Cosimo Nigro, Carlos Delgado Mendez, Lluis Font, Saša Mićanović, Ivana Batković, Dominik Baack, Satoshi Fukami, Bernd Schleicher, P. G. Prada Moroni, Jelena Strišković, Kyoshi Nishijima, Maria-Isabel Bernardos, Edgar Molina, Yukiho Kobayashi, Martin Makariev, Oscar Blanch, Yusuke Suda, Thomas Schweizer, Sofia Ventura, Marcos López-Moya, Ryuji Takeishi, Christian Fruck, L. Maraschi, Elina Lindfors, Stefano Ansoldi, Wlodek Bednarek, Federico Di Pierro, D. M. Strom, Kari Nilsson, Marcel Strzys, Carlo Vigorito, Masahiro Teshima, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Riccardo Paoletti, Daniel Mazin, Simone Mender, Javier Herrera, Markus Gaug, Ievgen Vovk, Alexander Hahn, Giacomo D'Amico, Ruben Lopez-Coto, Andrés Baquero, Francesco Dazzi, Jordi Delgado, Vandad Fallah Ramazani, Josep M. Paredes, Jarred Gershon Green, Marina Manganaro, Marine Pihet, Yuki Iwamura, Antonio Stamerra, Ž. Bošnjak, Markus Garczarczyk, Irene Jiménez Martínez, Elena Moretti, Simona Paiano, Kevin Schmidt, Konstancja Satalecka, Michele Doro, Alicia Fattorini, Jose Miguel Miranda, Michele Palatiello, Junko Kushida, Lovro Pavletić, Paolo Da Vela, Iva Šnidarić, Julian Sitarek, David H. Green, Daniela Hadasch, Yoshiki Ohtani, Louis Antonelli, Carolin Wunderlich, Victor A. Acciari, Moritz Hütten, Wrijupan Bhattacharyya, Darko Zarić, Mosè Mariotti, Saverio Lombardi, Sidika Merve Colak, Monica Vazquez Acosta, Andrea Rugliancich, and Ivica Puljak
Subjects: Physics, High energy, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics, MAGIC (telescope), Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, Gamma-ray burst, Redshift
Abstract: Gamma-ray bursts (GRBs) are the most energetic phenomena in the Universe. Many aspects of GRB physics are still under debate, such as the origin of their gamma-ray emission above the GeV energy range. In 2019, MAGIC detected TeV gamma rays from the long GRB 190114C, whose emission can be well explained by synchrotron-self Compton emission by relativistic electrons. However, it is still unclear whether such a process is common in GRBs, given the reduced number of GRBs detected until now at the very high energies (VHE). GRB 201216C is a long GRB and is the second one detected by MAGIC in this energy range. After receiving the alert provided by Swift-BAT, MAGIC automatically slewed to the GRB position, starting observations 56 seconds after the GRB onset. In the offline analyses of the collected data, we confirmed the detection of gamma-ray emission with a significance above 5 sigma. Following measurements from optical facilities, the redshift of this GRB was estimated to be 𝑧� = 1.1. This makes GRB 201216C the most distant object ever detected by ground-based gamma-ray telescopes. In this contribution we will show the analysis results of the MAGIC data, also in comparison with past detected GRBs in the same energy range. Finally, accounting for available multi-wavelength observations, we will comment on the possible origin of the VHE emission detected by MAGIC., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2021

18. Discovery of TXS 1515-273 at VHE gamma-rays and modelling of its Spectral Energy Distribution

Author: Daniel Kerszberg, Marie Karjalainen, Katsuaki Asano, Alexander Hahn, Davide Depaoli, Tomohiko Oka, Monica Orienti, Sara Cutini, Daniel Morcuende, Maria Victoria Fonseca, Marc Ribó, Jose Luis Contreras, Marine Pihet, Kyoshi Nishijima, Juan Cortina, Nikola Godinovic, Abelardo Moralejo, Hidetoshi Kubo, Tomohiro Inada, Tihomir Surić, Pratik Majumdar, Leonardo Di Venere, Jürgen Besenrieder, Hendrik Bökenkamp, Martin Will, Jorge Otero-Santos, Francesco Giordano, Antonio Tutone, Seiya Nozaki, Dominik Elsaesser, Juan Abel Barrio, Stefano Covino, Stefano Menchiari, Lena Linhoff, Davide Miceli, Dario Hrupec, Mitsunari Takahashi, Narek Sahakyan, Razmik Mirzoyan, Damir Lelas, Lluis Font, Lea Heckmann, Alessia Spolon, Léa Jouvin, Matteo Cerruti, Satoshi Fukami, Carlos Delgado Mendez, Alice Donini, Karl Mannheim, D. Dominis Prester, Bernd Schleicher, Edgar Molina, Jordi Delgado, Takeshi Nakamori, Jenni Jormanainen, Francesco Gabriele Saturni, Manuel Delfino, Ulisses Barres de Almeida, Dorota Sobczyńska, Zeljka Bosnjak, Armin Nabizadeh, Maria-Isabel Bernardos, Giovanni Ceribella, Vassil Verguilov, Bernardo Machado de Oliveira Fraga, Marcel Strzys, Simone Mender, Javier Herrera, Yusuke Suda, Barbara De Lotto, Kevin Schmidt, Yasushi Fukazawa, Alicia López-Oramas, John Hoang, Carlo Vigorito, Camilla Maggio, Daniela Dorner, Lara Nava, Ana Babić, Sidika Merve Colak, Gaia Vanzo, Elisabetta Bissaldi, Ivica Puljak, Ciro Bigongiari, Manuela Mallamaci, Simona Paiano, Thomas Schweizer, Fabrizio Tavecchio, Monica Vazquez Acosta, Eduardo Colombo, Sargis Gasparyan, Junko Kushida, Alessio Berti, Ievgen Vovk, Ramon J. García López, Ryuji Takeishi, D. M. Strom, Stefano Ansoldi, Masahiro Teshima, Alicia Fattorini, Manuel Artero, Riccardo Paoletti, Markus Gaug, Lovro Pavletić, L. Maraschi, Kari Nilsson, Marcos López-Moya, Axel Arbet Engels, M. I. Martínez, Elina Lindfors, Vandad Fallah Ramazani, Josep M. Paredes, Daniel Mazin, Tomislav Terzić, Julian Sitarek, Antonio Stamerra, Francesco Longo, Massimo Persic, Giacomo D'Amico, Daniela Hadasch, Francesco Dazzi, Roberto Carosi, Wolfgang Rhode, Giovanni Busetto, Serena Loporchio, Lorenzo Bellizzi, Cosimo Nigro, Yoshiki Ohtani, Wlodek Bednarek, Federico Di Pierro, Ruben Lopez-Coto, Sofia Ventura, Elia Do Souto Espiñeira, Jarred Gershon Green, Juliane van Scherpenberg, Irene Jiménez Martínez, F. D'Ammando, Andrés Baquero, Jose Miguel Miranda, Martin Makariev, Yating Chai, Oscar Blanch, Paolo Da Vela, Giacomo Bonnoli, Stefan Cikota, Pawel Gliwny, Nicola Giglietto, David H. Green, P. G. Prada Moroni, Victoria Moreno, Darko Zarić, Santiago Ubach, Shunsuke Sakurai, Alessandra Lamastra, Vincenzo Vitale, Francesco Leone, Stefano Truzzi, Pablo Peñil, Saša Mićanović, Mosè Mariotti, Ivana Batković, Chiara Righi, Chaitanya Priyadarshi, Adrian Biland, Saverio Lombardi, Andrea Rugliancich, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Victor A. Acciari, Moritz Hütten, Kazuma Ishio, Wrijupan Bhattacharyya, Elisa Prandini, Louis Antonelli, Carolin Wunderlich, Ashot Chilingarian, Josefa González, Takashi Saito, Dominik Baack, Yukiho Kobayashi, Christian Fruck, Yuki Iwamura, Markus Garczarczyk, Michele Palatiello, Iva Šnidarić, Tjark Miener, David Paneque, Jelena Strišković, Marina Manganaro, Elena Moretti, Konstancja Satalecka, Michele Doro, Petar Temnikov, Koji Noda, Elisa Bernardini, and Alessandro De Angelis
Subjects: Physics, law, Astrophysics::High Energy Astrophysical Phenomena, Broadband, Gamma ray, Spectral energy distribution, Astrophysics, MAGIC (telescope), Peak location, Blazar, Synchrotron, law.invention
Abstract: In February 2019, a flaring state of the extreme blazar candidate TXS 1515-273 was registered by the Fermi-LAT, which triggered observations with the MAGIC telescopes and the X-ray satellites Swift, XMM-Newton and NuStar. The observations led to the discovery of the source at very-high-energy (VHE, 100 GeV < E < $ 100 TeV) gamma-ray energies and the detection of short time scales of variability (1 h) in several X-ray bands. The analysis of the observed variability helped us to constrain the physical parameters of the emission region. Thanks to the high-quality X-ray data, the synchrotron peak location was determined. The source was classified as a high synchrotron peaked source during the flaring activity. We constructed the broadband spectral energy distribution from radio to TeV. We interpreted it assuming leptonic emission and taking into account the constraints from the X-ray variability. We tested two scenarios: a simple one-zone model and a two-component model. Both models were found to describe the data well from X-ray to VHE gamma ray, but the two-zone model allows for a more accurate modelling of the emission at radio and optical energies.
Published: 2021

19. Protons Spectrum from {MAGIC} Telescopes data

Author: Javier Rico, Tokonatsu Yamamoto, Serena Loporchio, Lorenzo Bellizzi, Vitaly Neustroev, Daniela Dorner, Ivica Puljak, Chiara Righi, Alessandra Lamastra, Alice Donini, Takashi Saito, Lara Nava, Fabrizio Tavecchio, Eduardo Colombo, Davide Depaoli, Luca Tosti, Vincenzo Vitale, Gaia Vanzo, Ryuji Takeishi, D. M. Strom, Lena Linhoff, Dominik Baack, Kari Nilsson, Valerio D'Elia, Kazuma Ishio, Ciro Bigongiari, Jordi Delgado, Wrijupan Bhattacharyya, Ramon J. García López, Stefano Menchiari, Stefano Covino, Leonardo Di Venere, G. Maneva, Francesco Leone, Chaitanya Priyadarshi, Ž. Bošnjak, Yukiho Kobayashi, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Daniel Morcuende, Jose Luis Contreras, Thomas Schweizer, Kevin Schmidt, Juan Abel Barrio, Manuela Mallamaci, Juan Cortina, Lluis Font, Stefano Ansoldi, Riccardo Paoletti, Markus Gaug, Alessandro De Angelis, Giacomo D'Amico, Paolo Da Vela, Adrian Biland, David H. Green, Giovanni Ceribella, Narek Sahakyan, Petar Temnikov, Koji Noda, Sidika Merve Colak, Elisa Bernardini, Hendrik Bökenkamp, Shunsuke Sakurai, Dominik Elsaesser, Satoshi Fukami, Razmik Mirzoyan, Roberto Carosi, Alexander Hahn, Monica Vazquez Acosta, Marcel Strzys, M. I. Martínez, Elisa Prandini, Daniel Kerszberg, Victor A. Acciari, Damir Lelas, Junko Kushida, Tomohiko Oka, Simone Mender, Manuel Artero, Lovro Pavletić, Javier Herrera, Andrés Baquero, Carlos Delgado Mendez, Marine Pihet, Lea Heckmann, Francesco Gabriele Saturni, Vandad Fallah Ramazani, Cosimo Nigro, Josep M. Paredes, L. Maraschi, Yuki Iwamura, Tomislav Terzić, Elina Lindfors, Kyoshi Nishijima, Manuel Delfino, Ulisses Barres de Almeida, Daniel Mazin, Moritz Hütten, Jarred Gershon Green, Yating Chai, Stefano Truzzi, D. Dominis Prester, Dorota Sobczyńska, Masahiro Teshima, Antonio Stamerra, Sofia Ventura, Abelardo Moralejo, Pablo Peñil, Stefan Cikota, Ana Babić, Pawel Gliwny, Nicola Giglietto, Julian Sitarek, Ashot Chilingarian, Josefa González, Yusuke Suda, Marcos López-Moya, Christian Fruck, Jenni Jormanainen, Victoria Moreno, Francesco Longo, Daniela Hadasch, Wlodek Bednarek, Marc Ribó, Federico Di Pierro, Carlo Vigorito, Maria-Isabel Bernardos, Louis Antonelli, Ruben Lopez-Coto, Pratik Majumdar, Bernardo Machado de Oliveira Fraga, Saša Mićanović, Darko Zarić, Ivana Batković, Giacomo Bonnoli, Yoshiki Ohtani, Santiago Ubach, Massimo Persic, Irene Jiménez Martínez, P. G. Prada Moroni, Marie Karjalainen, Bernd Schleicher, Carolin Wunderlich, Alessio Berti, Martin Will, Hidetoshi Kubo, Tomohiro Inada, Simona Paiano, Edgar Molina, Alicia Fattorini, Davide Miceli, Jorge Otero-Santos, Axel Arbet Engels, Dario Hrupec, Seiya Nozaki, Tihomir Surić, Francesco Dazzi, Alessia Spolon, Mitsunari Takahashi, Léa Jouvin, Elia Do Souto Espiñeira, Sargis Gasparyan, Markus Garczarczyk, Mosè Mariotti, Karl Mannheim, Vassil Verguilov, Wolfgang Rhode, Giovanni Busetto, Alicia López-Oramas, Martin Makariev, Saverio Lombardi, Oscar Blanch, Andrea Rugliancich, Katsuaki Asano, Maria Victoria Fonseca, Nikola Godinovic, John Hoang, Michele Palatiello, Matteo Cerruti, Iva Šnidarić, Marina Manganaro, Yasushi Fukazawa, Elena Moretti, Ievgen Vovk, Takeshi Nakamori, Konstancja Satalecka, Barbara De Lotto, Camilla Maggio, Michele Doro, Tjark Miener, David Paneque, Jelena Strišković, Juliane van Scherpenberg, and Jose Miguel Miranda
Subjects: Physics, COSMIC cancer database, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cosmic ray, MAGIC (telescope), Nuclear Experiment, Proton energy, Cherenkov radiation, Spectral line
Abstract: Imaging Atmospheric Cherenkov telescopes (IACTs) are designed to detect cosmic gamma rays. As a by-product, IACTs detect Cherenkov flashes generated by millions of hadronic air showers every night. We present the proton energy spectrum from several hundred GeV to several hundred TeV, retrieved from the hadron induced showers detected by the MAGIC telescopes. The protons are discriminated from He and other heavy nuclei by means of using machine learning classification. The energy estimation is based on a specially developed deep neural network regressor. In the last decade, Deep Learning methods gained much interest in the scientific community for their ability to extract complex relations in data and process large datasets in a short time. The proton energy spectrum obtained in this work is compared to the spectra obtained by dedicated cosmic ray experiments.
Published: 2021

20. Understanding the origin of the extended gamma-ray emission and the physical nature of {HESS} J1841-055 using observations at {TeV} energies with the {MAGIC} telescopes

Author: Jordi Delgado, Marcel Strzys, Kevin Schmidt, Josefa González, Ivica Puljak, Simone Mender, Javier Herrera, Lena Linhoff, Junko Kushida, Lovro Pavletić, Louis Antonelli, Ramon J. García López, Manuela Mallamaci, Vandad Fallah Ramazani, Francesco Longo, Alessandro De Angelis, Stefano Truzzi, Josep M. Paredes, Antonio Stamerra, Julian Sitarek, Pablo Peñil, Katsuaki Asano, Carolin Wunderlich, Stefano Menchiari, Maria Victoria Fonseca, Daniela Hadasch, Kazuma Ishio, Markus Garczarczyk, Elia Do Souto Espiñeira, Lab Saha, Elisa Prandini, Tihomir Surić, Yoshiki Ohtani, Nikola Godinovic, Saša Mićanović, Marcos López-Moya, Ashot Chilingarian, Christian Fruck, Yating Chai, Stefan Cikota, Alexander Hahn, Martin Makariev, Mosè Mariotti, John Hoang, Wlodek Bednarek, Federico Di Pierro, Oscar Blanch, Pawel Gliwny, Marine Pihet, Ivana Batković, Nicola Giglietto, Dominik Elsaesser, Serena Loporchio, Razmik Mirzoyan, Davide Depaoli, Damir Lelas, Tomohiko Oka, D. Dominis Prester, Karl Mannheim, Wrijupan Bhattacharyya, Massimo Persic, Ruben Lopez-Coto, Andrés Baquero, Alice Donini, Kyoshi Nishijima, Victoria Moreno, Jenni Jormanainen, Saverio Lombardi, Darko Zarić, Alicia López-Oramas, Lea Heckmann, Irene Jiménez Martínez, Francesco Gabriele Saturni, Juan Abel Barrio, Thomas Schweizer, Francesco Dazzi, Dorota Sobczyńska, Zeljka Bosnjak, Tjark Miener, David Paneque, Bernardo Machado de Oliveira Fraga, Lara Nava, Andrea Rugliancich, Victor A. Acciari, Maria-Isabel Bernardos, Narek Sahakyan, Stefano Ansoldi, Jose Miguel Miranda, Riccardo Paoletti, Fabrizio Tavecchio, Moritz Hütten, Markus Gaug, Ciro Bigongiari, Eduardo Colombo, Cosimo Nigro, Jelena Strišković, Marina Manganaro, Sofia Ventura, Leonardo Di Venere, Lorenzo Bellizzi, Abelardo Moralejo, Sargis Gasparyan, Marie Karjalainen, Carlos Delgado Mendez, Wolfgang Rhode, Giovanni Busetto, Simona Paiano, Alicia Fattorini, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Alessandra Lamastra, Elena Moretti, Bernd Schleicher, Giacomo Bonnoli, Edgar Molina, P. G. Prada Moroni, Konstancja Satalecka, M. I. Martínez, Alessio Berti, Vincenzo Vitale, Daniel Morcuende, Jose Luis Contreras, Michele Doro, Axel Arbet Engels, Shunsuke Sakurai, Juan Cortina, Sidika Merve Colak, Michele Palatiello, Monica Vazquez Acosta, Yuki Iwamura, Pratik Majumdar, Hendrik Bökenkamp, Francesco Leone, Martin Will, Jorge Otero-Santos, Iva Šnidarić, Yusuke Suda, Seiya Nozaki, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Paolo Da Vela, Carlo Vigorito, David H. Green, Takashi Saito, Manuel Delfino, Ulisses Barres de Almeida, Dominik Baack, Yukiho Kobayashi, Ana Babić, Manuel Artero, Tomislav Terzić, Roberto Carosi, Davide Miceli, Alessia Spolon, Léa Jouvin, Vassil Verguilov, Daniel Kerszberg, Marc Ribó, Hidetoshi Kubo, Tomohiro Inada, Adrian Biland, Javier Rico, Tokonatsu Yamamoto, Vitaly Neustroev, Luca Tosti, Valerio D'Elia, G. Maneva, Daniela Dorner, Gaia Vanzo, Petar Temnikov, Koji Noda, Elisa Bernardini, Takeshi Nakamori, Barbara De Lotto, Camilla Maggio, Satoshi Fukami, Masahiro Teshima, Chiara Righi, Chaitanya Priyadarshi, Santiago Ubach, Giacomo D'Amico, Jarred Gershon Green, Dario Hrupec, Mitsunari Takahashi, Stefano Covino, Giovanni Ceribella, L. Maraschi, Elina Lindfors, Daniel Mazin, Matteo Cerruti, Yasushi Fukazawa, Juliane van Scherpenberg, Ievgen Vovk, and Lluis Font
Subjects: Physics, Wavelength, Previous generation, High energy, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, MAGIC (telescope), Astrophysics
Abstract: With the improved sensitivity with respect to the previous generation, current space-borne and ground-based gamma-ray telescopes have made the number of γ-ray sources detected at GeV- TeV energies increase many folds over the last decade. Many of the detected extended gamma-ray sources are not associated with any known sources at other wavelengths. Understanding the nature of these sources and the origin of the observed high energy gamma-ray emission remains a great challenge. Using the MAGIC telescopes, we have observed one such unassociated gamma-ray source, named HESS J1841-055 at TeV energies. We investigate the physical nature and origin of the γ-ray emission from this extended source. In this paper, we present the results of our detailed investigation on this source using MAGIC data and other multi-waveband information on nearby sources. The results included in this proceeding and shown in this presentation were published in ref. [1]. The details about the analysis, interpretation and modelling can be found in the aforementioned reference.
Published: 2021

21. H.e.s.s. And magic observations of a sudden cessation of a very-high-energy γ -ray flare in PKS 1510-089 in May 2016

Author: A. Yusafzai, J. van Scherpenberg, M. Büchele, B. Boccardi, S. Caroff, S. J. Fegan, Daniela Dorner, T. Schweizer, Mosè Mariotti, Gaia Vanzo, Tom Armstrong, Nu. Komin, Pratik Majumdar, M. V. Fonseca, Matteo Cerruti, A. Lemiere, F. Eichhorn, J. Devin, C. Trichard, Michael Punch, Stefano Gabici, M. Palatiello, V. A. Acciari, F. Schüssler, Sylvia Zhu, P. J. Meintjes, Werner Hofmann, Samuel Timothy Spencer, Y. Kajiwara, J. Zorn, D. Dominis Prester, S. Bonnefoy, Constantin Steppa, G. Maurin, Adrian Biland, J. M. Paredes, Antonio Stamerra, U. Barres de Almeida, Tadayuki Takahashi, Damir Lelas, Victor Doroshenko, Davide Depaoli, Dmitriy Kostunin, R. Mirzoyan, T. Surić, D. Gottschall, M. Füßling, Moritz Hütten, Lea Heckmann, M. Gaug, J. Herrera, Ullrich Schwanke, C. Arcaro, H. Abdalla, Lorenzo Bellizzi, Thomas P. Krichbaum, Francesco Dazzi, John Hoang, Martin Will, Dominik Baack, L. Maraschi, Elina Lindfors, M. A. Kastendieck, R. Rauth, V. Baghmanyan, D. Ninci, Koji Noda, Michael Backes, S. Raab, Sanae Inoue, Giacomo D'Amico, Manuel Meyer, Q. Remy, L. Olivera-Nieto, Dorota Sobczyńska, Elisa Bernardini, M. Filipovic, Riaan Steenkamp, Davit Zargaryan, Hambeleleni Ndiyavala, Stefan Klepser, G. Vasileiadis, G. Lamanna, S. G. Jorstad, Daniel Mazin, Jacek Niemiec, Kirsty Feijen, Alessandro Montanari, Tim Holch, Seiya Nozaki, Anna Barnacka, M. Hörbe, Giacomo Bonnoli, D. Strom, T. Tavernier, Takeshi Oka, Axel Donath, J. Rico, A. W. Chen, J. Dyks, T. Chand, Jim Hinton, F. Niederwanger, Olaf Reimer, Daniel Kerszberg, Manuel Delfino, Krzysztof Katarzynski, Ivica Puljak, S. Sailer, Dmitry Khangulyan, Christian Fruck, Gavin Rowell, D. A. Sanchez, Maria Haupt, Julian Sitarek, Alan P. Marscher, Stefano Truzzi, Pablo Peñil, E. O. Angüner, Catherine Boisson, S. Ventura, Dieter Horns, M. Bryan, V. Barbosa Martins, L. Sun, Rachel Simoni, Gerard Fontaine, Jacco Vink, P. Reichherzer, Jim Davies, G. Hermann, Regis Terrier, Clemens Hoischen, A. A. Zdziarski, G. Ferrara, Francois Brun, G. Emery, M. de Bony de Lavergne, P. Vincent, Kyoshi Nishijima, Alessandra Lamastra, G. Fichet de Clairfontaine, E. de Oña Wilhelmi, P. Munar-Adrover, Yoshiki Ohtani, Carlo Romoli, Jordi Delgado, Wrijupan Bhattacharyya, L. Di Venere, D. Zarić, Zorawar Wadiasingh, F. Di Pierro, Ž. Bošnjak, Hester Schutte, Isak Delberth Davids, Roberta Zanin, Karl Mannheim, M. Strzys, Łukasz Stawarz, R. J. Tuffs, V. Fallah Ramazani, B. Bi, Marc Ribó, Sabrina Casanova, H. Prokoph, A. Carosi, Stefano Covino, D. J. van der Walt, Thomas Murach, Yating Chai, Saša Mićanović, Jae-Young Kim, V. Vitale, Francesco Longo, R. Konno, Alicia Fattorini, Narek Sahakyan, Y. A. Gallant, R. J. García López, Junko Kushida, Jürgen Besenrieder, Dario Hrupec, P. Da Vela, S. Steinmassl, P. G. Prada Moroni, Jonathan Mackey, Rafal Moderski, Stefan Cikota, Hidetoshi Kubo, Armelle Jardin-Blicq, Monica Barnard, J. Otero-Santos, Mischa Breuhaus, J. Becerra González, Yu. W. Wong, V. Joshi, Samuel Zouari, N. Shafi, Natalia Żywucka, E. Prandini, M. A. Lopez, Gianluca Giavitto, Katsuaki Asano, Mitsunari Takahashi, T. Vuillaume, M. Curyło, P. Morris, K. Egberts, Stefano Ansoldi, M. de Naurois, Pawel Gliwny, L. Pavletić, C. Moore, Alessia Spolon, M. Vazquez Acosta, D. Elsaesser, Tomoki Saito, Giovanni Ceribella, Riccardo Paoletti, Celine Armand, Jhilik Majumdar, Stefan Ohm, G. Busetto, Léa Jouvin, Ana Babić, Frank M. Rieger, A. Dmytriiev, Dorit Glawion, Z. R. Weaver, Włodek Kluźniak, S. Chandra, V. Marandon, A. Djannati-Ataï, E. Moulin, Tomasz Bulik, Alessio Berti, M. Seglar-Arroyo, H. Odaka, Christian Stegmann, Stefan Wagner, C. Perennes, Pierre Brun, Yasunobu Uchiyama, A. Fiasson, U. Colin, David A. Green, Kazuma Ishio, A. Arbet Engels, A. De Angelis, Wlodek Bednarek, Nikola Godinovic, F. Ait Benkhali, Vassil Verguilov, Camilla Maggio, L. Mohrmann, Jean-Pierre Ernenwein, M. Spir-Jacob, M. Karjalainen, Vitaly Neustroev, P. deWilt, M. Scalici, Victoria Moreno, A. Priyana Noel, A. López-Oramas, M. Lemoine-Goumard, N. Torres-Albà, Martin Makariev, C. van Rensburg, Oscar Blanch, S. Pita, Alexander Hahn, V. Sahakian, Yusuke Suda, S. Schwemmer, Thomas Lohse, Misao Sasaki, Daniel Morcuende, Johannes Veh, D. Jankowsky, Michael Kreter, D. Berge, Luca Tosti, R. Marx, F. Werner, V. Poireau, Andrea Santangelo, C. Nigro, Andreas Quirrenbach, Jose Luis Contreras, E. Ruiz-Velasco, Thomas Bylund, M. Tluczykont, V. D'Elia, A. S. Seyffert, Jose Miguel Miranda, Massimo Persic, L. Dirson, Efthalia Traianou, Carlo Vigorito, Sargis Gasparyan, Y. Kobayashi, Jacques Muller, Jeffrey A. Hodgson, Marek Jamrozy, Christoph Deil, I. Jung-Richardt, Joachim Hahn, Mohanraj Senniappan, A. Rugliancich, Marina Manganaro, K. Nakashima, Kleopas Shiningayamwe, Alice Donini, Michelle Tsirou, Yuki Iwamura, G. Maneva, L. A. Antonelli, Juan Cortina, Markus Holler, Michal Ostrowski, Wolfgang Rhode, L. Rinchiuso, Felix Jankowsky, Sebastian Panny, M. I. Martínez, Michael Zacharias, Ferdinando Giordano, Felix Aharonian, Lluis Font, J.-P. Lenain, Merja Tornikoski, B. Machado de Oliveira Fraga, M.-H. Grondin, Lenka Tomankova, Markus Böttcher, Alison Mitchell, Chiara Righi, E. Do Souto Espiñeira, Tomislav Terzić, Alexandre Marcowith, P. Temnikov, Helene Sol, Sabrina Einecke, Iryna Lypova, Toshiaki Inada, Rodolfo Carosi, R. D. Parsons, Yvonne Becherini, Shunsuke Sakurai, L. Giunti, A. Nayerhoda, Arnaud Mares, Chaitanya Priyadarshi, Satoshi Fukami, Konstancja Satalecka, Stefan Funk, Johan Bregeon, Sidika Merve Colak, Alicja Wierzcholska, R. J. White, F. Leone, Michele Doro, D. Huber, Carolina Casadio, Anne Lähteenmäki, Masahiro Teshima, Domenico Tiziani, D. Malyshev, M. Panter, U. Katz, Heinrich J. Völk, G. Martí-Devesa, C. Levy, M. Renaud, J. A. Barrio, Kai Phillip Schmidt, L. Oakes, N. Giglietto, Simone Mender, Paolo Marchegiani, Ashot Chilingarian, Tjark Miener, James E. M. Watson, David Paneque, J. Bolmont, Manuela Mallamaci, Halim Ashkar, A. Sinha, Fabrizio Tavecchio, Kari Nilsson, B. van Soelen, B. Rudak, R. Adam, D. Miceli, M. Mohamed, Saverio Lombardi, E. Molina, P. T. O'Brien, E. Colombo, Lab Saha, Luca Foffano, C. van Eldik, G. Peron, Garret Cotter, D. Hadasch, D. A. Prokhorov, K. Kosack, Konrad Bernlöhr, B. Peyaud, I. Vovk, G. Pühlhofer, A. Reimer, J. F. Glicenstein, Bruno Khelifi, Serena Loporchio, I. Snidaric, Abelardo Moralejo, Andreas Specovius, E. Moretti, Bernd Schleicher, M. Minev, B. De Lotto, Andrés Baquero, A.M. Taylor, J. Damascene Mbarubucyeye, Christo Venter, Ciro Bigongiari, A. Zech, M. Garczarczyk, R. López-Coto, Q. Piel, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire Univers et Particules de Montpellier (LUPM), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), H.E.S.S., MAGIC, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), German Research Foundation, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Astrofisica, Swiss National Science Foundation, Ministerio de Economía y Competitividad (España), Department of Atomic Energy (India), Academy of Finland, University of Tokyo, La Caixa, Croatian Science Foundation, University of Rijeka, Polish National Agency for Academic Exchange, Abdalla, H., Adam, R., Aharonian, F., Ait Benkhali, F., Ang??ner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Y., Berge, D., Bernl??hr, K., Bi, B., B??ttcher, M., Boisson, C., Bolmont, J., Bonnefoy, S., de Bony de Lavergne, M., Bregeon, J., Breuhaus, M., Brun, F., Brun, P., Bryan, M., B??chele, M., Bulik, T., Bylund, T., Caroff, S., Carosi, A., Casanova, S., Chand, T., Chandra, S., Chen, A., Cotter, G., Cury??o, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., Dewilt, P., Dirson, L., Djannati-Ata??, A., Dmytriiev, A., Donath, A., Doroshenko, V., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P., Feijen, K., Fegan, S., Fiasson, A., Fichet de Clairfontaine, G., Filipovic, M., Fontaine, G., Funk, S., F????ling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M. -H., Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., H??rbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kastendieck, M. A., Katarzy??ski, K., Katz, U., Khangulyan, D., Kh??lifi, B., Klepser, S., Klu??niak, W., Komin, Nu., Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemi??re, A., Lemoine-Goumard, M., Lenain, J. -P., Levy, C., Lohse, T., Lypova, I., Mackey, J., Majumdar, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Mares, A., Mart??-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Mitchell, A. M. W., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., de Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., O???brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., de Ona Wilhelmi, E., Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Priyana Noel, A., Prokhorov, D. A., Prokoph, H., P??hlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Sailer, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Scalici, M., Sch??ssler, F., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, M., Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Spir-Jacob, M., Stawarz, ??., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Tomankova, L., Trichard, C., Tsirou, M., Tuffs, R., Uchiyama, Y., van der Walt, D. J., van Eldik, C., van Rensburg, C., van Soelen, B., Vasileiadis, G., Veh, J., Venter, C., Vincent, P., Vink, J., V??lk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Watson, J., Werner, F., White, R., Wierzcholska, A., Wong, Yu. W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., ywucka, N., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Asano, K., Baack, D., Babi??, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Becerra Gonz??lez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bo??njak, ??., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D???amico, G., D???elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espi??eira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garc??a L??pez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovi??, N., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., H??tten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., L??pez, M., L??pez-Coto, R., L??pez-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Mart??nez, M., Mazin, D., Mender, S., Mi??anovi??, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavleti??, L., Pe??il, P., Perennes, C., Persic, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Rib??, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., nidari??, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suri??, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzi??, T., Teshima, M., Torres-Alb??, N., Tosti, L., Truzzi, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Zari??, D., Jorstad, S. G., Marscher, A. P., Boccardi, B., Casadio, C., Hodgson, J., Kim, J. -Y., Krichbaum, T. P., L??hteenm??ki, A., Tornikoski, M., Traianou, E., Weaver, Z. R., Gravitation and Astroparticle Physics Amsterdam, High Energy Astrophys. & Astropart. Phys (API, FNWI), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2), Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: non-thermal, quasars: individual: PKS 1510−089, galaxies: active, relativistic processes, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies [radiation mechanisms], Photon, individual: PKS 1510−089 [quasars], Astrophysics::High Energy Astrophysical Phenomena, Flux, radiation mechanisms: non-thermal / quasars: individual: PKS 1510−089 / galaxies: active / relativistic processes, radiation mechanisms: non-thermal, quasars: individual: PKS 1510-089, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, law, 0103 physical sciences, Galaxies: Active, Quasars: Individual: Pks 1510-089, Radiation mechanisms: Non-thermal, Relativistic processes, individual: PKS 1510-089 [quasars], MAGIC (telescope), 010303 astronomy & astrophysics, Physics, [PHYS]Physics [physics], 010308 nuclear & particles physics, Astronomy and Astrophysics, Quasar, Light curve, non-thermal [radiation mechanisms], relativistic processes [radiation mechanisms], Extragalactic background light, Space and Planetary Science, active [galaxies], ddc:520, Física nuclear, quasars: individual: PKS 1510��089, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Fermi Gamma-ray Space Telescope, Flare
Abstract: The flat spectrum radio quasar (FSRQ) PKS 1510−089 is known for its complex multiwavelength behaviour and it is one of only a few FSRQs detected in very-high-energy (VHE, E > 100 GeV) γ rays. The VHE γ-ray observations with H.E.S.S. and MAGIC in late May and early June 2016 resulted in the detection of an unprecedented flare, which revealed, for the first time, VHE γ-ray intranight variability for this source. While a common variability timescale of 1.5 h has been found, there is a significant deviation near the end of the flare, with a timescale of ∼20 min marking the cessation of the event. The peak flux is nearly two orders of magnitude above the low-level emission. For the first time, a curvature was detected in the VHE γ-ray spectrum of PKS 1510–089, which can be fully explained by the absorption on the part of the extragalactic background light. Optical R-band observations with ATOM revealed a counterpart of the γ-ray flare, even though the detailed flux evolution differs from the VHE γ-ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE γ-ray flare. In the high-energy (HE, E > 100 MeV) γ-ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE γ-ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the γ-ray spectrum indicates that the emission region is located outside of the BLR. Radio very-long-baseline interferometry observations reveal a fast-moving knot interacting with a standing jet feature around the time of the flare. As the standing feature is located ∼50 pc from the black hole, the emission region of the flare may have been located at a significant distance from the black hole. If this is indeed a true correlation, the VHE γ rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock., Astronomy & Astrophysics, 648, ISSN:0004-6361, ISSN:1432-0746
Published: 2021

22. Multi-epoch monitoring of TXS 0506+056 with MAGIC and MWL partners

Author: Ivica Puljak, Josefa González, Ciro Bigongiari, Davide Miceli, Alessia Spolon, Léa Jouvin, Chiara Righi, Marina Manganaro, Ievgen Vovk, Yusuke Suda, Elena Moretti, Sargis Gasparyan, Vassil Verguilov, Ramon J. García López, Pratik Majumdar, Carlo Vigorito, Marcos López-Moya, Wlodek Bednarek, Dario Hrupec, Konstancja Satalecka, Juliane van Scherpenberg, Federico Di Pierro, Michele Doro, Javier Rico, Tokonatsu Yamamoto, Wolfgang Rhode, Giovanni Busetto, Vitaly Neustroev, Lorenzo Bellizzi, Ruben Lopez-Coto, John Hoang, Martin Will, Thomas Schweizer, Florian Eppel, Kazuma Ishio, F. D'Ammando, Mitsunari Takahashi, Luca Tosti, Raniere de Menezes, Davide Depaoli, Jorge Otero-Santos, Christian Fruck, Irene Jiménez Martínez, Marcello Giroletti, Andrés Baquero, Matteo Cerruti, Valerio D'Elia, Chaitanya Priyadarshi, Stefano Ansoldi, Seiya Nozaki, Yasushi Fukazawa, Sara Buson, Sebastian Kiehlmann, Jamie Stevens, Alessio Berti, Elisa Prandini, G. Maneva, Florian Rösch, Tjark Miener, Philip G. Edwards, Takeshi Nakamori, Jose Miguel Miranda, David Paneque, Alexander Hahn, Riccardo Paoletti, Markus Gaug, Shoko Koyama, Abelardo Moralejo, Barbara De Lotto, Leonardo Di Venere, Jelena Strišković, Tomohiko Oka, Giacomo Bonnoli, Adrian Biland, Juan Abel Barrio, Camilla Maggio, Michele Palatiello, Roberto Carosi, Jonas Heßdörfer, P. G. Prada Moroni, Jürgen Besenrieder, Francesco Giordano, Antonio Tutone, Alessandra Lamastra, Narek Sahakyan, Kyoshi Nishijima, Shunsuke Sakurai, Daniel Kerszberg, Santiago Ubach, Marine Pihet, Axel Arbet Engels, Vincenzo Vitale, Manuel Delfino, Ulisses Barres de Almeida, Iva Šnidarić, Georgios Paraschos, Sidika Merve Colak, Stefano Truzzi, Lena Linhoff, Maria-Isabel Bernardos, Olivier Hervet, Pablo Peñil, Ashot Chilingarian, Monica Vazquez Acosta, Telamon, Marie Karjalainen, Bernd Schleicher, Matthias Kadler, Stefano Menchiari, Saša Mićanović, D. Dominis Prester, Edgar Molina, Elisa Pueschel, Ivana Batković, Carlos Delgado Mendez, Satoshi Fukami, Takashi Saito, Manuel Artero, Marc Ribó, Jonas Sinapius, Ilaria Viale, Francesco Leone, Vandad Fallah Ramazani, Josep M. Paredes, Antonio Stamerra, Manuela Mallamaci, Alessandro De Angelis, Katsuaki Asano, Jenni Jormanainen, Anthony C. S. Readhead, Dominik Baack, Yating Chai, Hidetoshi Kubo, Tomohiro Inada, Masahiro Teshima, Alice Donini, Ana Babić, Bernardo Machado de Oliveira Fraga, Tomislav Terzić, Simona Paiano, Cosimo Nigro, Lluis Font, Stefan Cikota, Paolo Da Vela, Pawel Gliwny, Julian Sitarek, Nicola Giglietto, Yukiho Kobayashi, Roopesh Ojha, Markus Garczarczyk, L. Maraschi, Sofia Ventura, Alicia Fattorini, Elina Lindfors, David H. Green, Victoria Moreno, Darko Zarić, D. Berge, Daniel Morcuende, Jose Luis Contreras, Eduardo Ros, Alex Kraus, Lara Nava, M. I. Martínez, Dominik Elsaesser, Andrea Gokus, Thomas P. Krichbaum, Francesco Dazzi, Tihomir Surić, Fabrizio Tavecchio, Razmik Mirzoyan, Michael Zacharias, Juan Cortina, Marcel Strzys, Giacomo D'Amico, Eduardo Colombo, Damir Lelas, Daniel Mazin, Yuki Iwamura, Maria Victoria Fonseca, Daniela Dorner, Lea Heckmann, Francesco Gabriele Saturni, Simone Mender, Javier Herrera, Hendrik Bökenkamp, Dorota Sobczyńska, Zeljka Bosnjak, Gaia Vanzo, Karl Mannheim, Jarred Gershon Green, Ryuji Takeishi, D. M. Strom, Kari Nilsson, Daniela Hadasch, Alicia López-Oramas, Serena Loporchio, Nikola Godinovic, Massimo Persic, Petar Temnikov, Stefano Covino, Koji Noda, Elisa Bernardini, Giovanni Ceribella, Yoshiki Ohtani, Francesco Longo, Jordi Delgado, Elia Do Souto Espiñeira, Uwe Bach, Jörn Wilms, Kevin Schmidt, Talvikki Hovatta, Martin Makariev, Oscar Blanch, Junko Kushida, Lovro Pavletić, Wrijupan Bhattacharyya, Victor A. Acciari, Moritz Hütten, Louis Antonelli, Carolin Wunderlich, Mosè Mariotti, Tommaso Aniello, Saverio Lombardi, and Andrea Rugliancich
Subjects: Physics, Epoch (reference date), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Astronomy, Magic (paranormal), media_common
Abstract: The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. The real-time followup of neutrino events turned out to be the most successful approach in neutrino point-source searches. It brought, among others, the most compelling evidence for a neutrino point source: the flaring gamma-ray blazar TXS 0506+056 in coincidence with a single high-energy neutrino from IceCube (IceCube-170922A). The fast multiwavelength(MWL) follow-up of this alert was key for establishing this coincidence and constraining the subsequent theoretical modeling for this event. In the long run, accurate and contemporaneous MWL spectral measurements are essential ingredients in investigating the physical processes leading to particle acceleration and emission of radiation. A deeper understanding of those processes allows us to put constraints on the potential neutrino emission. Here we present the light curves and simultaneous spectral energy distributions from November 2017 till February 2021 of MAGIC and MWL monitoring of TXS 0506+056. The more than the two year-long rise and high state of the radio light curve of TXS 0506+056, which started near the time of the IceCube neutrino detection, seems to have ended, as indicated by a steep decrease in the first half of 2021. We also present the theoretical interpretation of our observations., PoS: Proceedings of Science, 395, ISSN:1824-8039, 37th International Cosmic Ray Conference (ICRC 2021)
Published: 2021

23. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

Author: Masanori Nakamura, R. Shang, Abelardo Moralejo, A. Rugliancich, Marina Manganaro, Jun Liu, Monika Moscibrodzka, Andreas Specovius, V. Ramakrishnan, S. O'Brien, Michal Ostrowski, Luis C. Ho, Sera Markoff, D. Depaoli, I. Jung-Richardt, Manel Errando, Chiara Righi, S. Panny, Toshiaki Inada, Alexandra J. Tetarenko, Daniela Dorner, Norbert Wex, Nimesh A. Patel, Olivier Hervet, C. Arcaro, Alasdair E. Gent, Yu Wun Wong, Gaia Vanzo, Pierre Brun, Konstancja Satalecka, Stefan Funk, Lorenzo Bellizzi, Michael Lindqvist, Michele Doro, Felix Jankowsky, P. Kaaret, Nicholas R. MacDonald, Lang Cui, P. Temnikov, S. Patel, Sabrina Einecke, Manuel Artero, E. Moretti, Hope Boyce, M. Gaug, Charles F. Gammie, Iryna Lypova, Gisela N. Ortiz-León, Felix Aharonian, Colin J. Lonsdale, Buell T. Jannuzi, Gavin Rowell, M. Bryan, Yvonne Becherini, Aleksandar Popstefanija, M. Pohl, A. Marcowith, Jean-Pierre Ernenwein, H. Alyson Ford, Wystan Benbow, Karen E. Williamson, Daryl Haggard, Hambeleleni Ndiyavala, Tod R. Lauer, Arnaud Mares, Chaitanya Priyadarshi, Michael Punch, Helge Rottmann, J. Zorn, D. Dominis Prester, Bernd Schleicher, M. Minev, Hector Olivares, Ciriaco Goddi, S. Pita, J. Herrera, Alessia Spolon, Léa Jouvin, Na Wang, G. Martí-Devesa, Tomohiko Oka, Kirsty Feijen, E. Do Souto Espiñeira, Ralph Eatough, Johannes Veh, Stefano Gabici, Tomislav Terzić, D. Glawion, Gilles Fontaine, Bradford Benson, C. B. Rulten, Jenni Jormanainen, Jason SooHoo, Michael Titus, Jose Miguel Delgado, Marcos López-Moya, Freek Roelofs, Wlodek Bednarek, M. Lundy, Richard Anantua, Alessandra Lamastra, P. T. Reynolds, Vassil Verguilov, M. Lemoine-Goumard, G. Fichet de Clairfontaine, L. Di Venere, Michael Kreter, Jose Miguel Miranda, Alan L. Roy, Yating Chai, A. López-Oramas, M. Tluczykont, Jacek Niemiec, R. Konno, Tyler Trent, Olaf Reimer, Heino Falcke, Amanpreet Kaur, M. Panter, Narek Sahakyan, Kasper B. Schmidt, A. Carosi, K. Egberts, L. Maraschi, Stefan Cikota, V. Joshi, Koji Noda, Elisa Bernardini, Ye-Fei Yuan, Garrett K. Keating, Fumie Tazaki, Pawel Gliwny, M. Vazquez Acosta, Nicola Giglietto, M. Capasso, Vincent Piétu, Satoshi Fukami, Roman Gold, Elina Lindfors, Satoki Matsushita, A. Lemiere, F. Eichhorn, U. Katz, Yoshinori Yonekura, N. Shafi, Natalia Żywucka, Michael Kramer, M. Palatiello, Daniel Mazin, Samuel Timothy Spencer, Victoria Moreno, Oliver Porth, Julian Sitarek, Kazi L.J. Rygl, Wen Ping Lo, Geoffrey C. Bower, Ilje Cho, S. Fegan, Samuel Zouari, J. M. Paredes, V. Fallah Ramazani, Thomas Murach, Jim Hinton, R. J. White, F. Leone, S. Loporchio, M. de Naurois, Ed Fomalont, Bart Ripperda, Dominique Broguiere, J. Becerra González, Joseph R. Farah, Q. Feng, Andreas Quirrenbach, Taehyun Jung, C. Trichard, Masahiro Teshima, Domenico Tiziani, D. Malyshev, Richard Plambeck, Lynn D. Matthews, Avery E. Broderick, S. Kumar, T. J. Williamson, M. K. Daniel, Sylvia Zhu, P. J. Meintjes, Tjark Miener, Jodi Christiansen, Roger Brissenden, S. Sailer, Dmitry Khangulyan, David Paneque, Thomas P. Krichbaum, Sergey S. Savchenko, Angelo Ricarte, Riaan Steenkamp, T. Chand, J. Dyks, Francesco Dazzi, V. Baghmanyan, Zorawar Wadiasingh, Kazunori Akiyama, Stefan Ohm, C. Levy, Giovanna Ferrara, Makoto Inoue, Jhilik Majumdar, Nobuyuki Sakai, Dieter Horns, Jorge A. Preciado-López, Cornelia Müller, G. Hermann, Regis Terrier, A. J. Chromey, Dominic W. Pesce, Felix M. Pötzl, Mark Gurwell, Alejandro Cruz-Osorio, Ivan Marti-Vidal, Ben Prather, Tom Armstrong, Jongho Park, Matteo Cerruti, Ziri Younsi, Amy Furniss, Chih-Wei Locutus Huang, Lijing Shao, A. Djannati-Ataï, Shoko Koyama, D. Gottschall, P. Vincent, A. Brill, Kenji Toma, Antonios Nathanail, M. Nievas-Rosillo, M. Seglar-Arroyo, C. Delgado Mendez, Mahito Sasada, G. Busetto, Maciek Wielgus, Marcos Santander, Doosoo Yoon, D. A. Sanchez, Hiroki Okino, Christo Venter, Christiaan D. Brinkerink, James Ryan, S. Mićanović, Raquel Fraga-Encinas, Mark G. Rawlings, G. H. Sembroski, G. Principe, Xiang Liu, Karl Friedrich Schuster, Ronald Hesper, L. Sun, Ciro Bigongiari, Ramesh Narayan, M. Strzys, L. Mohrmann, Daniel R. van Rossum, Y. Ohtani, Wu Jiang, Luciano Rezzolla, Nu. Komin, V. A. Acciari, Katherine L. Bouman, Jürgen Besenrieder, Clemens Hoischen, A. A. Zdziarski, Antonio Tutone, Hung Yi Pu, A. Arbet Engels, J.-P. Lenain, A. De Angelis, Tomoya Hirota, R. J. García López, Carlo Romoli, Werner Hofmann, Tuomas Savolainen, Neil M. Nagar, Minfeng Gu, M. Karjalainen, Vitaly Neustroev, A. N. Otte, John F. C. Wardle, Tomoaki Oyama, Jongsoo Kim, Monica Barnard, J. Otero-Santos, R. D. Parsons, Pierre Christian, A. Priyana Noel, A. S. Seyffert, Shami Chatterjee, E. O. Angüner, David A. Green, Ramesh Karuppusamy, Zhiyuan Li, J. Devin, Dominik Elsaesser, F. Giordano, Santiago Ubach, Michael A. Nowak, Y. Kobayashi, F. Di Pierro, Iniyan Natarajan, A. Zech, M. Garczarczyk, Dmitriy Kostunin, Michael Janssen, Giacomo Bonnoli, Mariafelicia De Laurentis, Kuo Liu, G. Emery, Yutaro Kofuji, Antxon Alberdi, Marco Toliman Lucchini, R. A. Ong, Catherine Boisson, Daniel C. M. Palumbo, Stefan Klepser, Stefano Covino, Motoki Kino, Daniel Kerszberg, C. Armand, Maria Haupt, D. Zarić, K. Pfrang, R. López-Coto, M. Zacharias, Jae-Young Kim, Sheperd S. Doeleman, U. Barres de Almeida, Pratik Majumdar, M. V. Fonseca, Mosè Mariotti, G. Lamanna, Alexander Hahn, Sidika Merve Colak, R. J. Tuffs, B. Bi, Juan-Carlos Algaba, L. Oakes, D. Jankowsky, Y. Kajiwara, R. Marx, Bošnjak, John E. Barrett, Kotaro Niinuma, F. D'Ammando, Qingwen Wu, A. Yusafzai, Christian M. Fromm, Chi-kwan Chan, B. De Lotto, M. Kertzman, Manuela Mallamaci, H. Prokoph, Tadayuki Takahashi, Damir Lelas, Victor Doroshenko, E. Kasai, Lea Heckmann, Bong Won Sohn, Francesco Gabriele Saturni, Shiro Ikeda, T. Vuillaume, Laurent Loinard, G. Maurin, M. Füßling, Martin Will, Yi Chen, Gianluca Giavitto, Remo P. J. Tilanus, M. Spir-Jacob, Alessandro Montanari, Thomas Lohse, Tihomir Surić, J. van Scherpenberg, Per Friberg, He Sun, Luca Tosti, Kiyoaki Wajima, E. Ruiz-Velasco, Thomas Bylund, M. Balokovic, Feng Yuan, S. Nozaki, Mischa Breuhaus, Peter Galison, Y. A. Gallant, L. Olivera-Nieto, Dorota Sobczyńska, Maria-Isabel Bernardos, R. Rauth, Izumi Mizuno, Vincent L. Fish, S. G. Jorstad, Tomoki Saito, Giovanni Ceribella, Jacques Muller, J. P. Finley, Stefano Ansoldi, Boris Georgiev, Marcello Giroletti, Arturo I. Gómez-Ruiz, Karl M. Menten, Aristeidis Noutsos, P. deWilt, Junhan Kim, Alejandro Mus Mejías, Q. Remy, Dong-Jin Kim, P. G. Prada Moroni, Robert Wharton, Riccardo Paoletti, R. R. Prado, Zhi-Qiang Shen, S. Paiano, S. Chandra, Andrés Baquero, Anna Barnacka, Lucy Fortson, Wrijupan Bhattacharyya, Marc Ribó, E. de Ona Wilhelmi, Paul T. P. Ho, Yan-Rong Li, Derek Ward-Thompson, M. Scalici, G. Maneva, Constantin Steppa, Dimitrios Psaltis, A.M. Taylor, J. Damascene Mbarubucyeye, Daniel P. Marrone, Karl Mannheim, W. Boland, P. Morris, D. A. Prokhorov, M. Mohamed, Katsuaki Asano, Gernot Maier, Kotaro Moriyama, H. Odaka, M. Büchele, E. Pueschel, Kazuyoshi Nishijima, Christopher J. Duffy, H. M. Schutte, Camilla Maggio, Mark Kettenis, V. D'Elia, Saverio Lombardi, Ramprasad Rao, Ivica Puljak, R. Mirzoyan, V. Sahakian, Guang Yao Zhao, Adrian Biland, F. Werner, Rafal Moderski, Olivier Gentaz, Ullrich Schwanke, James M. Moran, S. Komossa, Yuzhu Cui, A. Jiménez-Rosales, Arash Roshanineshat, S. Ventura, Lindy Blackburn, David J. James, G. Hughes, Hidetoshi Kubo, Mansour Karami, José L. Gómez, P. Reichherzer, Davit Zargaryan, Paul Tiede, Koushik Chatterjee, Chunchong Ni, Roger Deane, Axel Donath, J. Rico, A. W. Chen, A. Fiasson, Jun Yi Koay, T. B. Humensky, Satoko Sawada-Satoh, Isak Delberth Davids, Alan P. Marscher, Alan E. E. Rogers, Rebecca Azulay, Kazuma Ishio, Paul M. Chesler, D. M. Strom, Carlo Vigorito, Marek Jamrozy, G. Pühlhofer, M. de Bony de Lavergne, Roberta Zanin, T. Schweizer, Elisa Prandini, Helene Sol, Rodolfo Carosi, M. Hörbe, T. Tavernier, Mareki Honma, M. Holler, Gordon T. Richards, Armelle Jardin-Blicq, Paolo Marchegiani, Sang-Sung Lee, D. Huber, Ashot Chilingarian, Nikola Godinovic, F. Ait Benkhali, Jason Dexter, Do-Young Byun, Anton Dmytriiev, Massimo Persic, Alicia Fattorini, L. Dirson, Cosimo Nigro, E. Roache, Sargis Gasparyan, S. Schwemmer, Sara Issaoun, Jessica Dempsey, Andrea Santangelo, Włodek Kluźniak, Mel Rose, Huib Jan van Langevelde, D. J. van der Walt, Elisabetta Liuzzo, A. Stamerra, John Hoang, Michelle Tsirou, Wolfgang Rhode, Tomohisa Kawashima, L. A. Antonelli, Carolin Wunderlich, Keiichi Asada, David A. Williams, Joachim Hahn, P. Moriarty, T. M. Crawford, P. Da Vela, L. Rinchiuso, E. Molina, F. Peter Schloerb, Lovro Pavletić, S. Steinmassl, Des Small, Christoph Deil, Stefano Menchiari, Dan Bintley, K. Nakashima, Alice Donini, David H. Hughes, Heinrich J. Völk, Mohanraj Senniappan, K. A. Farrell, M. Renaud, J. A. Barrio, Miriam Lucio Martinez, Rachel Simoni, P. T. O'Brien, E. Colombo, V. Barbosa Martins, M. Orienti, Efthalia Traianou, Lluis Font, B. Machado de Oliveira Fraga, Y. Suda, J. Neilsen, John Conway, Eduardo Ros, Gibwa Musoke, Tarek M. Hassan, J. Bolmont, A. Sinha, Halim Ashkar, M.-H. Grondin, Daniel Nieto, Lab Saha, Fabrizio Tavecchio, Hyunwook Ro, Michael H. Hecht, Markus Böttcher, Antonio Fuentes, Simone Mender, Moritz Hütten, Ue-Li Pen, Yosuke Mizuno, Gopal Narayanan, Lei Huang, H. Abdalla, M. A. Kastendieck, Nicola Marchili, I. Snidaric, S. Sánchez, G. Vasileiadis, Kari Nilsson, Alexander W. Raymond, Greg Lindahl, Gregory Desvignes, Sascha Trippe, Sanae Inoue, Giacomo D'Amico, W. Jin, B. van Soelen, Andrew Chael, Anne Kathrin Baczko, Shunsuke Sakurai, L. Giunti, A. Nayerhoda, Walter Alef, Jamie Holder, Stefano Truzzi, Pablo Peñil, M. J. Lang, Francois Brun, Frank M. Rieger, V. Vitale, George N. Wong, Jirong Mao, S. Caroff, J. Kushida, André Young, Ru-Sen Lu, Daniel Morcuende, Jose Luis Contreras, Kazuhiro Hada, Juan Cortina, C. van Eldik, Pablo Torne, Raymond Blundell, Jarred Gershon Green, C. B. Adams, James M. Cordes, Jonathan Weintroub, Q. Piel, A. Berti, James E. M. Watson, G. Peron, Ken Young, Garret Cotter, Dario Hrupec, Jonathan Mackey, K. Ragan, John E. Carlstrom, Michael Backes, Tim Holch, D. Hadasch, Stawarz, F. Niederwanger, Feryal Özel, Lia Medeiros, A. Weinstein, Mitsunari Takahashi, Manuel Delfino, C. Y. Kuo, Aviad Levis, Francesco Longo, K. Kosack, Konrad Bernlöhr, Jacco Vink, C. Moore, Michael Bremer, Jim Davies, Jadyn Anczarski, Patrick M. Koch, Sabrina Casanova, Ming-Tang Chen, B. Peyaud, Christian Stegmann, Stefan Wagner, C. Perennes, Yasunobu Uchiyama, David Kieda, Chet Ruszczyk, Hiroshi Nagai, M. Curyło, Andrei Lobanov, Ana Babić, E. Moulin, Tomasz Bulik, Britton Jeter, I. Vovk, Martin Makariev, C. van Rensburg, Oscar Blanch, Rocco Lico, Silke Britzen, Misao Sasaki, A. Reimer, V. Poireau, R. Adam, David Ball, Mark Reynolds, D. Miceli, John L. Quinn, Roberto Garcia, J. F. Glicenstein, D. Ribeiro, A. Wierzcholska, Geoffrey B. Crew, Bruno Khelifi, David Sánchez-Arguelles, Ilse van Bemmel, Michael D. Johnson, J. Anton Zensus, Dominik Baack, Manuel Meyer, E. V. Kravchenko, I. Jiménez, Thomas Bronzwaer, Reshmi Mukherjee, D. Berge, C. Giuri, Kleopas Shiningayamwe, Shan Shan Zhao, Yuki Iwamura, A. D. Falcone, Lenka Tomankova, Carsten Kramer, Jan Wagner, Christian Fruck, B. Rudak, Jordy Davelaar, V. Marandon, K. Katarzyński, Roberto Neri, The EHT MWL Science Working Group, Institut de RadioAstronomie Millimétrique (IRAM), Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Instituto de RadioAstronomía Milimétrica (IRAM), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Univers et Théories (LUTH (UMR_8102)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire Univers et Particules de Montpellier (LUPM), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Groupe de Physique des Solides (GPS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL), Event Horizon Telescope, Fermi-LAT, H.E.S.S., MAGIC, VERITAS, EAVN, High Energy Astrophys. & Astropart. Phys (API, FNWI), API Other Research (FNWI), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Algaba, Jc, Anczarski, J, Asada, K, Balokovic, M, Chandra, S, Cui, Yz, Falcone, Ad, Giroletti, M, Goddi, C, Hada, K, Haggard, D, Jorstad, S, Kaur, A, Kawashima, T, Keating, G, Kim, Jy, Kino, M, Komossa, S, Kravchenko, Ev, Krichbaum, Tp, Lee, S, Lu, R, Lucchini, M, Markoff, S, Neilsen, J, Nowak, Ma, Park, J, Principe, G, Ramakrishnan, V, Reynolds, Mt, Sasada, M, Savchenko, S, Williamson, Ke, Longo, F, Et, Al., University of Michigan, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Algaba, J. C., Anczarski, J., Asada, K., Balokovic, M., Chandra, S., Cui, Y. -Z., Falcone, A. D., Giroletti, M., Goddi, C., Hada, K., Haggard, D., Jorstad, S., Kaur, A., Kawashima, T., Keating, G., Kim, J. -Y., Kino, M., Komossa, S., Kravchenko, E. V., Krichbaum, T. P., Lee, S. -S., Lu, R. -S., Lucchini, M., Markoff, S., Neilsen, J., Nowak, M. A., Park, J., Principe, G., Ramakrishnan, V., Reynolds, M. T., Sasada, M., Savchenko, S. S., Williamson, K. E., Akiyama, K., Alberdi, A., Alef, W., Anantua, R., Azulay, R., Baczko, A. -K., Ball, D., Barrett, J., Bintley, D., Benson, B. A., Blackburn, L., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Byun, D. -Y., Carlstrom, J. E., Chael, A., Chan, C. -K., Chatterjee, S., Chatterjee, K., Chen, M. -T., Chen, Y., Chesler, P. M., Cho, I., Christian, P., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Doeleman, S. S., Eatough, R. P., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., Garcia, R., Gentaz, O., Georgiev, B., Gold, R., Gomez, J. L., Gomez-Ruiz, A. I., Gu, M., Gurwell, M., Hecht, M. H., Hesper, R., Ho, L. C., Ho, P., Honma, M., Huang, C. -W. L., Huang, L., Hughes, D. H., Ikeda, S., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., Jimenez-Rosales, A., Johnson, M. D., Jung, T., Karami, M., Karuppusamy, R., Kettenis, M., Kim, D. -J., Kim, J., Koay, J. Y., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, M., Kramer, C., Kuo, C. -Y., Lauer, T. R., Levis, A., Li, Y. -R., Li, Z., Lindqvist, M., Lico, R., Lindahl, G., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P., Lobanov, A. P., Loinard, L., Lonsdale, C., Macdonald, N. R., Mao, J., Marchili, N., Marrone, D. P., Marscher, A. P., Marti-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., Muller, C., Musoke, G., Mejias, A. M., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Neri, R., Ni, C., Noutsos, A., Okino, H., Olivares, H., Ortiz-Leon, G. N., Oyama, T., Ozel, F., Palumbo, D. C. M., Patel, N., Pen, U. -L., Pesce, D. W., Pietu, V., Plambeck, R., Popstefanija, A., Porth, O., Potzl, F. M., Prather, B., Preciado-Lopez, J. A., Psaltis, D., Pu, H. -Y., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Ros, E., Rose, M., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruszczyk, C., Rygl, K. L. J., Sanchez, S., Sanchez-Arguelles, D., Savolainen, T., Schloerb, F. P., Schuster, K. -F., Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Trent, T., Traianou, E., Trippe, S., Van Bemmel, I., Van Langevelde, H. J., Van Rossum, D. R., Wagner, J., Ward-Thompson, D., Wardle, J., Weintroub, J., Wex, N., Wharton, R., Wielgus, M., Wong, G. N., Wu, Q., Yoon, D., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y. -F., Zensus, J. A., Zhao, G. -Y., Zhao, S. -S., D'Ammando, F., Orienti, M., Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. A., Anguner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Y., Berge, D., Bernlohr, K., Bi, B., Bottcher, M., Boisson, C., Bolmont, J., De Bony De Lavergne, M., Breuhaus, M., Brun, F., Brun, P., Bryan, M., Buchele, M., Bulik, T., Bylund, T., Caroff, S., Carosi, A., Casanova, S., Chand, T., Chen, A., Cotter, G., Curylo, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., Dewilt, P., Dirson, L., Djannati-Atai, A., Dmytriiev, A., Donath, A., Doroshenko, V., Duffy, C., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P., Feijen, K., Fegan, S., Fiasson, A., De Clairfontaine, G. F., Fontaine, G., Funk, S., Fussling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M. -H., Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., Horbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kasai, E., Kastendieck, M. A., Katarzynski, K., Katz, U., Khangulyan, D., Khelifi, B., Klepser, S., Kluzniak, W., Komin, N., Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemiere, A., Lemoine-Goumard, M., Lenain, J. -P., Levy, C., Lohse, T., Lypova, I., Mackey, J., Majumdar, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Mares, A., Marti-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., De Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., O'Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., De Ona Wilhelmi, E., Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Noel, A. P., Prokhorov, D. A., Prokoph, H., Puhlhofer, G., Punch, M., Quirrenbach, A., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Sailer, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Scalici, M., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, M., Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Spir-Jacob, M., Stawarz, L., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Tomankova, L., Trichard, C., Tsirou, M., Tuffs, R., Uchiyama, Y., Van Der Walt, D. J., Van Eldik, C., Van Rensburg, C., Van Soelen, B., Vasileiadis, G., Veh, J., Venter, C., Vincent, P., Vink, J., Volk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Watson, J., Werner, F., White, R., Wierzcholska, A., Wong, Y. W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Zywucka, N., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. A., Artero, M., Asano, K., Baack, D., Babic, A., Baquero, A., De Almeida, U. B., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Amico, G., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jimenez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez-Coto, R., Lopez-Moya, M., Lopez-Oramas, A., Loporchio, S., Machado De Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Menchiari, S., Mender, S., Micanovic, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletic, L., Penil, P., Perennes, C., Persic, M., Moroni, P. G. P., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Zaric, D., Adams, C. B., Benbow, W., Brill, A., Capasso, M., Christiansen, J. L., Chromey, A. J., Daniel, M. K., Errando, M., Farrell, K. A., Feng, Q., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Giuri, C., Hassan, T., Hervet, O., Holder, J., Hughes, G., Humensky, T. B., Jin, W., Kaaret, P., Kertzman, M., Kieda, D., Kumar, S., Lang, M. J., Lundy, M., Maier, G., Moriarty, P., Mukherjee, R., Nieto, D., Nievas-Rosillo, M., O'Brien, S., Ong, R. A., Otte, A. N., Patel, S., Pfrang, K., Pohl, M., Prado, R. R., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Richards, G. T., Roache, E., Rulten, C., Ryan, J. L., Santander, M., Sembroski, G. H., Shang, R., Weinstein, A., Williams, D. A., Williamson, T. J., Hirota, T., Cui, L., Niinuma, K., Ro, H., Sakai, N., Sawada-Satoh, S., Wajima, K., Wang, N., Liu, X., Yonekura, Y., German Research Foundation, Istituto Nazionale di Fisica Nucleare, Swiss National Science Foundation, Ministerio de Ciencia, Innovación y Universidades (España), Department of Atomic Energy (India), University of Tokyo, Japan Society for the Promotion of Science, Ministry of Education and Scientific Research (Romania), Academy of Finland, La Caixa, Croatian Science Foundation, Generalitat de Catalunya, Polish National Agency for Academic Exchange, University of Rijeka, Department of Energy (US), Smithsonian Institution, Astronomy, and Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Montpellier 2 - Sciences et Techniques (UM2)
Subjects: Accretion, 010504 meteorology & atmospheric sciences, Astronomy, Flux, Astrophysics, 7. Clean energy, 01 natural sciences, Active galactic nuclei, Radio cores, Low-luminosity active galactic nuclei, High energy astrophysics, Astrophysical black holes, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, astro-ph.HE, Radio core, Accretion (meteorology), 520 Astronomie und zugeordnete Wissenschaften, Low-luminosity, active galactic nuclei, Astrophysical black hole, astro-ph.CO, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Active galactic nucleus, High-energy astronomy, astro-ph.GA, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, F500, Astrophysics::Cosmology and Extragalactic Astrophysics, High energy astrophysic, 0103 physical sciences, Very-long-baseline interferometry, ddc:530, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Event Horizon Telescope, Supermassive black hole, Astronomy and Astrophysics, 530 Physik, Galaxy, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), ddc:520, HESS - Abteilung Hinton, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: Full list of authors: EHT MWL Science Working Group; Algaba, J. C.; Anczarski, J.; Asada, K.; Baloković, M.; Chandra, S.; Cui, Y. -Z.; Falcone, A. D.; Giroletti, M.; Goddi, C.; Hada, K.; Haggard, D.; Jorstad, S.; Kaur, A.; Kawashima, T.; Keating, G.; Kim, J. -Y.; Kino, M.; Komossa, S.; Kravchenko, E. V.; Krichbaum, T. P.; Lee, S. -S.; Lu, R. -S.; Lucchini, M.; Markoff, S.; Neilsen, J.; Nowak, M. A.; Park, J.; Principe, G.; Ramakrishnan, V.; Reynolds, M. T.; Sasada, M.; Savchenko, S. S.; Williamson, K. E.; Event Horizon Telescope Collaboration; Akiyama, Kazunori; Alberdi, Antxon; Alef, Walter; Anantua, Richard; Azulay, Rebecca; Baczko, Anne-Kathrin; Ball, David; Barrett, John; Bintley, Dan; Benson, Bradford A.; Blackburn, Lindy; Blundell, Raymond; Boland, Wilfred; Bouman, Katherine L.; Bower, Geoffrey C.; Boyce, Hope; Bremer, Michael; Brinkerink, Christiaan D.; Brissenden, Roger; Britzen, Silke; Broderick, Avery E.; Broguiere, Dominique; Bronzwaer, Thomas; Byun, Do-Young; Carlstrom, John E.; Chael, Andrew; Chan, Chi-Kwan; Chatterjee, Shami; Chatterjee, Koushik; Chen, Ming-Tang; Chen, Yongjun; Chesler, Paul M.; Cho, Ilje; Christian, Pierre; Conway, John E.; Cordes, James M.; Crawford, Thomas M.; Crew, Geoffrey B.; Cruz-Osorio, Alejandro; Davelaar, Jordy; de Laurentis, Mariafelicia; Deane, Roger; Dempsey, Jessica; Desvignes, Gregory; Dexter, Jason; Doeleman, Sheperd S.; Eatough, Ralph P.; Falcke, Heino; Farah, Joseph; Fish, Vincent L.; Fomalont, Ed; Ford, H. Alyson; Fraga-Encinas, Raquel; Friberg, Per; Fromm, Christian M.; Fuentes, Antonio; Galison, Peter; Gammie, Charles F.; García, Roberto; Gentaz, Olivier; Georgiev, Boris; Gold, Roman; Gómez, José L.; Gómez-Ruiz, Arturo I.; Gu, Minfeng; Gurwell, Mark; Hecht, Michael H.; Hesper, Ronald; Ho, Luis C.; Ho, Paul; Honma, Mareki; Huang, Chih-Wei L.; Huang, Lei; Hughes, David H.; Ikeda, Shiro; Inoue, Makoto; Issaoun, Sara; James, David J.; Jannuzi, Buell T.; Janssen, Michael; Jeter, Britton; Jiang, Wu; Jiménez-Rosales, Alejandra; Johnson, Michael D.; Jung, Taehyun; Karami, Mansour; Karuppusamy, Ramesh; Kettenis, Mark; Kim, Dong-Jin; Kim, Jongsoo; Kim, Junhan; Koay, Jun Yi; Kofuji, Yutaro; Koch, Patrick M.; Koyama, Shoko; Kramer, Michael; Kramer, Carsten; Kuo, Cheng-Yu; Lauer, Tod R.; Levis, Aviad; Li, Yan-Rong; Li, Zhiyuan; Lindqvist, Michael; Lico, Rocco; Lindahl, Greg; Liu, Jun; Liu, Kuo; Liuzzo, Elisabetta; Lo, Wen-Ping; Lobanov, Andrei P.; Loinard, Laurent; Lonsdale, Colin; MacDonald, Nicholas R.; Mao, Jirong; Marchili, Nicola; Marrone, Daniel P.; Marscher, Alan P.; Martí-Vidal, Iván; Matsushita, Satoki; Matthews, Lynn D.; Medeiros, Lia; Menten, Karl M.; Mizuno, Izumi; Mizuno, Yosuke; Moran, James M.; Moriyama, Kotaro; Moscibrodzka, Monika; Müller, Cornelia; Musoke, Gibwa; Mejías, Alejandro Mus; Nagai, Hiroshi; Nagar, Neil M.; Nakamura, Masanori; Narayan, Ramesh; Narayanan, Gopal; Natarajan, Iniyan; Nathanail, Antonios; Neri, Roberto; Ni, Chunchong; Noutsos, Aristeidis; Okino, Hiroki; Olivares, Héctor; Ortiz-León, Gisela N.; Oyama, Tomoaki; Özel, Feryal; Palumbo, Daniel C. M.; Patel, Nimesh; Pen, Ue-Li; Pesce, Dominic W.; Piétu, Vincent; Plambeck, Richard; Popstefanija, Aleksandar; Porth, Oliver; Pötzl, Felix M.; Prather, Ben; Preciado-López, Jorge A.; Psaltis, Dimitrios; Pu, Hung-Yi; Rao, Ramprasad; Rawlings, Mark G.; Raymond, Alexander W.; Rezzolla, Luciano; Ricarte, Angelo; Ripperda, Bart; Roelofs, Freek; Rogers, Alan; Ros, Eduardo; Rose, Mel; Roshanineshat, Arash; Rottmann, Helge; Roy, Alan L.; Ruszczyk, Chet; Rygl, Kazi L. J.; Sánchez, Salvador; Sánchez-Arguelles, David; Savolainen, Tuomas; Schloerb, F. Peter; Schuster, Karl-Friedrich; Shao, Lijing; Shen, Zhiqiang; Small, Des; Sohn, Bong Won; Soohoo, Jason; Sun, He; Tazaki, Fumie; Tetarenko, Alexandra J.; Tiede, Paul; Tilanus, Remo P. J.; Titus, Michael; Toma, Kenji; Torne, Pablo; Trent, Tyler; Traianou, Efthalia; Trippe, Sascha; van Bemmel, Ilse; van Langevelde, Huib Jan; van Rossum, Daniel R.; Wagner, Jan; Ward-Thompson, Derek; Wardle, John; Weintroub, Jonathan; Wex, Norbert; Wharton, Robert; Wielgus, Maciek; Wong, George N.; Wu, Qingwen; Yoon, Doosoo; Young, André; Young, Ken; Younsi, Ziri; Yuan, Feng; Yuan, Ye-Fei; Zensus, J. Anton; Zhao, Guang-Yao; Zhao, Shan-Shan; Fermi Large Area Telescope Collaboration; Principe, G.; Giroletti, M.; D'Ammando, F.; Orienti, M.; H. E. S. S. Collaboration; Abdalla, H.; Adam, R.; Aharonian, F.; Benkhali, F. Ait; Angüner, E. O.; Arcaro, C.; Armand, C.; Armstrong, T.; Ashkar, H.; Backes, M.; Baghmanyan, V.; Barbosa Martins, V.; Barnacka, A.; Barnard, M.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Bi, B.; Böttcher, M.; Boisson, C.; Bolmont, J.; de Lavergne, M. De Bony; Breuhaus, M.; Brun, F.; Brun, P.; Bryan, M.; Büchele, M.; Bulik, T.; Bylund, T.; Caroff, S.; Carosi, A.; Casanova, S.; Chand, T.; Chen, A.; Cotter, G.; Curyło, M.; Damascene Mbarubucyeye, J.; Davids, I. D.; Davies, J.; Deil, C.; Devin, J.; Dewilt, P.; Dirson, L.; Djannati-Ataï, A.; Dmytriiev, A.; Donath, A.; Doroshenko, V.; Duffy, C.; Dyks, J.; Egberts, K.; Eichhorn, F.; Einecke, S.; Emery, G.; Ernenwein, J. -P.; Feijen, K.; Fegan, S.; Fiasson, A.; de Clairfontaine, G. Fichet; Fontaine, G.; Funk, S.; Füßling, M.; Gabici, S.; Gallant, Y. A.; Giavitto, G.; Giunti, L.; Glawion, D.; Glicenstein, J. F.; Gottschall, D.; Grondin, M. -H.; Hahn, J.; Haupt, M.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Hörbe, M.; Horns, D.; Huber, D.; Jamrozy, M.; Jankowsky, D.; Jankowsky, F.; Jardin-Blicq, A.; Joshi, V.; Jung-Richardt, I.; Kasai, E.; Kastendieck, M. A.; Katarzyński, K.; Katz, U.; Khangulyan, D.; Khélifi, B.; Klepser, S.; Kluźniak, W.; Komin, Nu.; Konno, R.; Kosack, K.; Kostunin, D.; Kreter, M.; Lamanna, G.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. -P.; Levy, C.; Lohse, T.; Lypova, I.; Mackey, J.; Majumdar, J.; Malyshev, D.; Malyshev, D.; Marandon, V.; Marchegiani, P.; Marcowith, A.; Mares, A.; Martí-Devesa, G.; Marx, R.; Maurin, G.; Meintjes, P. J.; Meyer, M.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Montanari, A.; Moore, C.; Morris, P.; Moulin, E.; Muller, J.; Murach, T.; Nakashima, K.; Nayerhoda, A.; de Naurois, M.; Ndiyavala, H.; Niederwanger, F.; Niemiec, J.; Oakes, L.; O'Brien, P.; Odaka, H.; Ohm, S.; Olivera-Nieto, L.; de Ona Wilhelmi, E.; Ostrowski, M.; Panter, M.; Panny, S.; Parsons, R. D.; Peron, G.; Peyaud, B.; Piel, Q.; Pita, S.; Poireau, V.; Noel, A. Priyana; Prokhorov, D. A.; Prokoph, H.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Rauth, R.; Reichherzer, P.; Reimer, A.; Reimer, O.; Remy, Q.; Renaud, M.; Rieger, F.; Rinchiuso, L.; Romoli, C.; Rowell, G.; Rudak, B.; Ruiz-Velasco, E.; Sahakian, V.; Sailer, S.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Scalici, M.; Schutte, H. M.; Schwanke, U.; Schwemmer, S.; Seglar-Arroyo, M.; Senniappan, M.; Seyffert, A. S.; Shafi, N.; Shiningayamwe, K.; Simoni, R.; Sinha, A.; Sol, H.; Specovius, A.; Spencer, S.; Spir-Jacob, M.; Stawarz, Ł.; Sun, L.; Steenkamp, R.; Stegmann, C.; Steinmassl, S.; Steppa, C.; Takahashi, T.; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tiziani, D.; Tluczykont, M.; Tomankova, L.; Trichard, C.; Tsirou, M.; Tuffs, R.; Uchiyama, Y.; van der Walt, D. J.; van Eldik, C.; van Rensburg, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venter, C.; Vincent, P.; Vink, J.; Völk, H. J.; Vuillaume, T.; Wadiasingh, Z.; Wagner, S. J.; Watson, J.; Werner, F.; White, R.; Wierzcholska, A.; Wong, Yu Wun; Yusafzai, A.; Zacharias, M.; Zanin, R.; Zargaryan, D.; Zdziarski, A. A.; Zech, A.; Zhu, S. J.; Zorn, J.; Zouari, S.; Żywucka, N.; MAGIC Collaboration; Acciari, V. A.; Ansoldi, S.; Antonelli, L. A.; Engels, A. Arbet; Artero, M.; Asano, K.; Baack, D.; Babić, A.; Baquero, A.; de Almeida, U. Barres; Barrio, J. A.; Becerra González, J.; Bednarek, W.; Bellizzi, L.; Bernardini, E.; Bernardos, M.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bošnjak, Ž.; Busetto, G.; Carosi, R.; Ceribella, G.; Cerruti, M.; Chai, Y.; Chilingarian, A.; Cikota, S.; Colak, S. M.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Elia, V.; da Vela, P.; Dazzi, F.; de Angelis, A.; de Lotto, B.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; di Pierro, F.; di Venere, L.; Do Souto Espiñeira, E.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Elsaesser, D.; Ramazani, V. Fallah; Fattorini, A.; Ferrara, G.; Fonseca, M. V.; Font, L.; Fruck, C.; Fukami, S.; García López, R. J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Green, J. G.; Green, D.; Hadasch, D.; Hahn, A.; Heckmann, L.; Herrera, J.; Hoang, J.; Hrupec, D.; Hütten, M.; Inada, T.; Inoue, S.; Ishio, K.; Iwamura, Y.; Jiménez, I.; Jormanainen, J.; Jouvin, L.; Kajiwara, Y.; Karjalainen, M.; Kerszberg, D.; Kobayashi, Y.; Kubo, H.; Kushida, J.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Machado de Oliveira Fraga, B.; Maggio, C.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Mazin, D.; Menchiari, S.; Mender, S.; Mićanović, S.; Miceli, D.; Miener, T.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Molina, E.; Moralejo, A.; Morcuende, D.; Moreno, V.; Moretti, E.; Neustroev, V.; Nigro, C.; Nilsson, K.; Nishijima, K.; Noda, K.; Nozaki, S.; Ohtani, Y.; Oka, T.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletić, L.; Peñil, P.; Perennes, C.; Persic, M.; Moroni, P. G. Prada; Prandini, E.; Priyadarshi, C.; Puljak, I.; Rhode, W.; Ribó, M.; Rico, J.; Righi, C.; Rugliancich, A.; Saha, L.; Sahakyan, N.; Saito, T.; Sakurai, S.; Satalecka, K.; Saturni, F. G.; Schleicher, B.; Schmidt, K.; Schweizer, T.; Sitarek, J.; Šnidarić, I.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Strom, D.; Strzys, M.; Suda, Y.; Surić, T.; Takahashi, M.; Tavecchio, F.; Temnikov, P.; Terzić, T.; Teshima, M.; Tosti, L.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Vanzo, G.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Vigorito, C. F.; Vitale, V.; Vovk, I.; Will, M.; Wunderlich, C.; Zarić, D.; VERITAS Collaboration; Adams, C. B.; Benbow, W.; Brill, A.; Capasso, M.; Christiansen, J. L.; Chromey, A. J.; Daniel, M. K.; Errando, M.; Farrell, K. A.; Feng, Q.; Finley, J. P.; Fortson, L.; Furniss, A.; Gent, A.; Giuri, C.; Hassan, T.; Hervet, O.; Holder, J.; Hughes, G.; Humensky, T. B.; Jin, W.; Kaaret, P.; Kertzman, M.; Kieda, D.; Kumar, S.; Lang, M. J.; Lundy, M.; Maier, G.; Moriarty, P.; Mukherjee, R.; Nieto, D.; Nievas-Rosillo, M.; O'Brien, S.; Ong, R. A.; Otte, A. N.; Patel, S.; Pfrang, K.; Pohl, M.; Prado, R. R.; Pueschel, E.; Quinn, J.; Ragan, K.; Reynolds, P. T.; Ribeiro, D.; Richards, G. T.; Roache, E.; Rulten, C.; Ryan, J. L.; Santander, M.; Sembroski, G. H.; Shang, R.; Weinstein, A.; Williams, D. A.; Williamson, T. J.; Eavn Collaboration; Hirota, Tomoya; Cui, Lang; Niinuma, Kotaro; Ro, Hyunwook; Sakai, Nobuyuki; Sawada-Satoh, Satoko; Wajima, Kiyoaki; Wang, Na; Liu, Xiang; Yonekura, Yoshinori, In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109 M o˙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87's spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded., The financial support of the German BMBF, MPG and HGF; the Italian INFN and INAF; the Swiss National Fund SNF; the ERDF under the Spanish Ministerio de Ciencia e Innovacion (MICINN) (FPA2017-87859-P, FPA2017-85668-P, FPA2017- 82729-C6-5-R, FPA2017-90566-REDC, PID2019-104114RBC31, PID2019-104114RB-C32, PID2019-105510GB-C31,PID 2019-107847RB-C41, PID2019-107847RB-C42, PID2019- 107988GB-C22); the Indian Department of Atomic Energy; the Japanese ICRR, the University of Tokyo, JSPS, and MEXT; the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-268/16.12.2019 and the Academy of Finland grant No. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and CEX2019- 000920-S, and “Maria de Maeztu” CEX2019-000918-M, the Unidad de Excelencia “Maria de Maeztu” MDM-2015-0509- 18-2 and the “la Caixa” Foundation (fellowship LCF/BQ/ PI18/11630012) and by the CERCA program of the Generalitat de Catalunya; by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02; by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3; the Polish National Research Centre grant UMO-2016/22/M/ST9/00382; and by the Brazilian MCTIC, CNPq, and FAPERJ. This research is supported by grants from the U.S. Department of Energy Office of Science, the U.S. National Science Foundation and the Smithsonian Institution, by NSERC in Canada, and by the Helmholtz Association in Germany. This research used resources provided by the Open Science Grid, which is supported by the National Science Foundation and the U.S. Department of Energy’s Office of Science, and resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. We acknowledge the excellent work of the technical support staff at the Fred Lawrence Whipple Observatory and at the collaborating institutions in the construction and operation of the instrument.
Published: 2021

24. Author Correction: Proton acceleration in thermonuclear nova explosions revealed by gamma rays

Author: V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres de Almeida, J. A. Barrio, I. Batković, J. Becerra González, W. Bednarek, L. Bellizzi, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, H. Bökenkamp, G. Bonnoli, Ž. Bošnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D’Amico, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, A. Del Popolo, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espiñeira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, L. Fariña Alonso, A. Fattorini, M. V. Fonseca, L. Font, C. Fruck, S. Fukami, Y. Fukazawa, R. J. García López, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinović, J. G. Green, D. Green, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Herrera, J. Hoang, D. Hrupec, M. Hütten, T. Inada, K. Ishio, Y. Iwamura, I. Jiménez Martínez, J. Jormanainen, L. Jouvin, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, L. Linhoff, S. Lombardi, F. Longo, R. López-Coto, M. López-Moya, A. López-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, A. Mas Aguilar, D. Mazin, S. Menchiari, S. Mender, S. Mićanović, D. Miceli, T. Miener, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, V. Moreno, E. Moretti, T. Nakamori, L. Nava, V. Neustroev, M. Nievas Rosillo, C. Nigro, K. Nilsson, K. Nishijima, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletić, P. Peñil, M. Persic, M. Pihet, P. G. Prada Moroni, E. Prandini, C. Priyadarshi, I. Puljak, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, F. G. Saturni, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Spolon, A. Stamerra, J. Strišković, D. Strom, M. Strzys, Y. Suda, T. Surić, M. Takahashi, R. Takeishi, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, L. Tosti, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, C. Wunderlich, T. Yamamoto, D. Zarić, F. Ambrosino, M. Cecconi, G. Catanzaro, C. Ferrara, A. Frasca, M. Munari, L. Giustolisi, J. Alonso-Santiago, M. Giarrusso, U. Munari, and P. Valisa
Subjects: Astronomy and Astrophysics
Published: 2022

25. New Hard-TeV Extreme Blazars Detected with the MAGIC Telescopes*

Author: D. Fidalgo, K. Nishijima, R. Mirzoyan, B. Machado de Oliveira Fraga, P. Majumdar, P. Temnikov, L. Bellizzi, H. Kubo, M. Vazquez Acosta, M. I. Martínez, B. De Lotto, D. Dominis Prester, S. Paiano, I. Šnidarić, C. Nigro, Y. Iwamura, A. Carosi, Stefano Covino, M. Makariev, Alice Donini, A. Rugliancich, P. Munar-Adrover, G. Vanzo, Satoshi Fukami, John Hoang, Massimo Persic, J. Becerra González, Kazuma Ishio, T. Saito, S. Ansoldi, M. Palatiello, V. Fallah Ramazani, Jordi Delgado, C. Maggio, M. Delfino, S. Gasparyan, Elisa Prandini, Francesco Dazzi, Saverio Lombardi, A. Lamastra, Saša Mićanović, A. Berti, V. Vitale, J. Kushida, Kari Nilsson, Dario Hrupec, D. Lelas, A. Arbet Engels, M. Mallamaci, L. Maraschi, Elisa Bernardini, Fabrizio Tavecchio, P. Peñil, Vitaly Neustroev, Elina Lindfors, Ll. Font, M. Peresano, K. Noda, U. Colin, N. Godinović, Mitsunari Takahashi, E. Molina, David Paneque, A. Biland, W. Bednarek, W. Bhattacharyya, A. Fattorini, Ž. Bošnjak, M. Will, Anne M. Lohfink, A. Somero, Luca Tosti, Antonio Stamerra, P. Da Vela, C. Fruck, F. D'Ammando, D. Guberman, Katsuaki Asano, K. Mannheim, R. Carosi, M. Minev, Francesco Longo, Jose Luis Contreras, M. Teshima, A. Hahn, R. J. García López, G. Maneva, L. Nogués, Susumu Inoue, I. Puljak, M. V. Fonseca, Abelardo Moralejo, Nicola Giglietto, J. van Scherpenberg, Juan Cortina, Ferdinando Giordano, Kevin Schmidt, E. Moretti, D. Miceli, U. Barres de Almeida, Victoria Moreno, Valerio Vagelli, B. Banerjee, Shunsuke Sakurai, A. Babić, F. Di Pierro, D. Hadasch, M. Ribó, Oscar Blanch, T. Schweizer, Serena Loporchio, Marina Manganaro, A. De Angelis, A. Chilingaryan, Dominik Baack, M. Strzys, S. Cikota, Daniel Kerszberg, P. G. Prada Moroni, Chiara Righi, V. D'Elia, Wolfgang Rhode, G. Ceribella, M. López, Konstancja Satalecka, D. Mazin, Michele Doro, C. Arcaro, G. Busetto, Ciro Bigongiari, D. Zarić, Matteo Cerruti, R. López-Coto, Tomohiro Inada, J. Herrera, Léa Jouvin, F. Leone, Julian Sitarek, G. Ferrara, D. Dorner, Louis Antonelli, E. Colombo, D. Morcuende, N. Torres-Albà, M. Garczarczyk, I. Vovk, Dorota Sobczyńska, Victor A. Acciari, Y. Chai, Moritz Hütten, D. Strom, J. Rico, R. Paoletti, J. Besenrieder, David H. Green, T. Surić, M. Gaug, L. Di Venere, G. Bonnoli, D. Elsaesser, D. Ninci, Jose Miguel Miranda, E. Do Souto Espiñeira, Tomislav Terzić, S. M. Colak, Juan Abel Barrio, Narek Sahakyan, A. López-Oramas, Yusuke Suda, Carlo Vigorito, L. Saha, J. M. Paredes, Francesco Tombesi, Seiya Nozaki, Davide Depaoli, L. Foffano, M. Mariotti, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), MAGIC, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. A., Asano, K., Baack, D., Babic, A., Banerjee, B., De Almeida, U. B., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingaryan, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Vela, P. D., Dazzi, F., Angelis, A. D., Lotto, B. D., Delfino, M., Delgado, J., Depaoli, D., Pierro, F. D., Venere, L. D., Souto Espieira, E. D., Prester, D. D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. F., Fattorini, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Lopez, R. J. G., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Godinovic, N., Green, D., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kerszberg, D., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., De Oliveira Fraga, B. M., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Micanovic, S., Miceli, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nozaki, S., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Peil, P., Peresano, M., Persic, M., Moroni, P. G. P., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alb, N., Tosti, L., Vagelli, V., Scherpenberg, J. V., Vanzo, G., Acosta, M. V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Zaric, D., Arcaro, C., Carosi, A., D'Ammando, F., Tombesi, F., Lohfink, A., 30588766 - Arcaro, Cornelia, Laboratoire d'Annecy de Physique des Particules (LAPP), German Research Foundation, Istituto Nazionale di Fisica Nucleare, Swiss National Science Foundation, Ministerio de Economía y Competitividad (España), Department of Atomic Energy (India), Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Academy of Finland, Croatian Science Foundation, University of Rijeka, Polish National Agency for Academic Exchange, and European Commission
Subjects: Non-thermal radiation sources, VHE [gamma ray], Non-thermal radiation source, Astrophysics, 01 natural sciences, Relativistic jet, MAGIC (telescope), 010303 astronomy & astrophysics, model: leptonic, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, astro-ph.HE, education.field_of_study, Gamma ray, gamma ray: emission, quality, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, BL Lacertae objects, Física nuclear, Catalog, Astrophysics and Astronomy, astro-ph.GA, Astrophysics::High Energy Astrophysical Phenomena, Population, energy spectrum, FOS: Physical sciences, Proton Synchrotron, magnetization, BL Lacertae object, leptonic [model], blazar, X-ray, Settore FIS/05 - Astronomia e Astrofisica, emission [gamma ray], 0103 physical sciences, synchrotron, education, Blazar, Active galactic nuclei, Gamma-ray sources, X-ray active galactic nuclei, 010308 nuclear & particles physics, Spectral density, Astronomy and Astrophysics, Catalogues, proton synchrotron, MAGIC, Synchrotron emission, Blazars, Relativistic jets, Catalogs, Automatic Keywords, gamma ray: VHE, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), ddc:520, spectral, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: Extreme high-frequency-peaked BL Lac objects (EHBLs) are blazars that exhibit extremely energetic synchrotron emission. They also feature nonthermal gamma-ray emission whose peak lies in the very high-energy (VHE, E > 100 GeV) range, and in some sources exceeds 1 TeV: this is the case for hard-TeV EHBLs such as 1ES 0229+200. With the aim of increasing the EHBL population, 10 targets were observed with the MAGIC telescopes from 2010 to 2017, for a total of 265 hr of good-quality data. The data were complemented by coordinated Swift observations. The X-ray data analysis confirms that all but two sources are EHBLs. The sources show only a modest variability and a harder-when-brighter behavior, typical for this class of objects. At VHE gamma-rays, three new sources were detected and a hint of a signal was found for another new source. In each case, the intrinsic spectrum is compatible with the hypothesis of a hard-TeV nature of these EHBLs. The broadband spectral energy distributions (SEDs) of all sources are built and modeled in the framework of a single-zone, purely leptonic model. The VHE gamma-ray-detected sources were also interpreted with a spine-layer model and a proton synchrotron model. The three models provide a good description of the SEDs. However, the resulting parameters differ substantially in the three scenarios, in particular the magnetization parameter. This work presents the first mini catalog of VHE gamma-ray and multiwavelength observations of EHBLs., We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA 2015-68378-P, FPA2017-82729-C6-2-R, FPA2015-69210-C6- 4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016- 76012-C3-1-P, ESP2015-71662-C2-2-P, FPA2017-90566-RE DC), the Indian Department of Atomic Energy, the Japanese JSPS and MEXT, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018, and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382, and by the Brazilian MCTIC, CNPq and FAPERJ. E.P. has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska–Curie grant agreement No. 664931. M.C. has received financial support through the Postdoctoral Junior Leader Fellowship Programme from la Caixa Banking Foundation, grant No. LCF/BQ/LI18/11630012.
Published: 2020

26. MAGIC observations of the diffuse γ -ray emission in the vicinity of the Galactic center

Author: U. Barres de Almeida, L. Nogués, Damir Lelas, Dorota Sobczyńska, Daniel Kerszberg, Zeljka Bosnjak, Satoshi Masuda, L. Maraschi, Elina Lindfors, M. Peresano, B. Banerjee, D. Strom, A. Rugliancich, Marina Manganaro, D. Zarić, Daniel Mazin, D. Dominis Prester, Shunsuke Sakurai, Kyoshi Nishijima, D. Fidalgo, Marc Ribó, I. Snidaric, S. Paiano, Pratik Majumdar, M. V. Fonseca, Giacomo Bonnoli, Martin Will, Karl Mannheim, Ivica Puljak, Seiya Nozaki, Juan Abel Barrio, M. Nöthe, Narek Sahakyan, Toshiaki Inada, Hidetoshi Kubo, G. Busetto, Konstancja Satalecka, Michele Doro, E. Molina, Pablo Peñil, P. Munar-Adrover, E. Colombo, Saša Mićanović, John Hoang, V. Fallah Ramazani, Lab Saha, T. Schweizer, Luca Foffano, K. Noda, Daniel Morcuende, Jose Luis Contreras, M. Palatiello, V. Vitale, J. Becerra González, Juan Cortina, Stefano Covino, Francesco Dazzi, A. Fernández-Barral, Alice Donini, L. A. Antonelli, D. Ninci, Sanae Inoue, U. Colin, Manuela Mallamaci, D. Hadasch, Alessio Berti, Kai Phillip Schmidt, Sidika Merve Colak, David A. Green, Alexander Hahn, Wrijupan Bhattacharyya, Jordi Delgado, Tomoki Saito, Giovanni Ceribella, J. van Scherpenberg, A. Arbet Engels, Léa Jouvin, Sargis Gasparyan, Fabrizio Tavecchio, A. Somero, F. Di Pierro, Lluis Font, Stefano Ansoldi, Manuel Delfino, I. Vovk, B. Machado de Oliveira Fraga, Vitaly Neustroev, Davide Depaoli, Riccardo Paoletti, Wolfgang Rhode, M. Strzys, David Paneque, D. Miceli, Mosè Mariotti, Yuki Iwamura, A. López-Oramas, P. G. Prada Moroni, N. Giglietto, Valerio Vagelli, Chiara Righi, G. Ferrara, J. Palacio, D. Guberman, Ana Babić, Nikola Godinovic, Luca Tosti, Ferdinando Giordano, P. Temnikov, Alicia Fattorini, R. J. García López, J. M. Paredes, Antonio Stamerra, Junko Kushida, P. Da Vela, M. I. Martínez, Serena Loporchio, Satoshi Fukami, G. Maneva, Jürgen Besenrieder, Christian Fruck, Camilla Maggio, Daniela Dorner, D. Elsaesser, Gaia Vanzo, V. A. Acciari, Massimo Persic, F. Leone, V. D'Elia, Kari Nilsson, M. Gaug, Adrian Biland, Masahiro Teshima, Saverio Lombardi, J. Herrera, Julian Sitarek, Cosimo Nigro, Elisa Bernardini, J. Rico, Dario Hrupec, M. A. Lopez, Mitsunari Takahashi, A. Chilingaryan, Dominik Baack, E. Do Souto Espiñeira, Tomislav Terzić, A. De Angelis, Yusuke Suda, Carlo Vigorito, Moritz Hütten, Abelardo Moralejo, E. Moretti, M. Minev, B. De Lotto, Ciro Bigongiari, M. Garczarczyk, R. López-Coto, Kazuma Ishio, Elisa Prandini, Rodolfo Carosi, R. Mirzoyan, Yating Chai, Stefan Cikota, M. Vazquez Acosta, Victoria Moreno, Francesco Longo, Lorenzo Bellizzi, Martin Makariev, Oscar Blanch, T. Surić, Shimpei Tsujimoto, Wlodek Bednarek, N. Torres-Albà, Jose Miguel Miranda, Alessandra Lamastra, L. Di Venere, Federal Ministry of Education and Research (Germany), Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Astrofisica, Swiss National Science Foundation, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Department of Atomic Energy (India), Japan Society for the Promotion of Science, Ministry of Education, Youth and Science (Bulgaria), Academy of Finland, Universidad de Barcelona, Croatian Science Foundation, University of Rijeka, Polish National Agency for Academic Exchange, Ministério da Ciência e Tecnologia (Brasil), Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Baack, D., Babic, A., Banerjee, B., Barres De Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Chai, Y., Chilingaryan, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernandez-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Godinovic, N., Green, D., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kerszberg, D., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Machado De Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Masuda, S., Mazin, D., Micanovic, S., Miceli, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nothe, M., Nozaki, S., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tosti, L., Tsujimoto, S., Vagelli, V., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., and Zaric, D.
Subjects: model [background], accelerator, Point source, Astrophysics::High Energy Astrophysical Phenomena, Gamma rays: general, background: model, general [Gamma rays], Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, programming, 01 natural sciences, Spectral line, law.invention, energy: threshold, law, gas, TRACER, 0103 physical sciences, ISM [Gamma rays], 010306 general physics, 010303 astronomy & astrophysics, Cosmic rays, Zenith, Astrophysics::Galaxy Astrophysics, Physics, Gamma rays: ISM, Galaxy: center, Galactic ridge, Galactic Center, Astronomy and Astrophysics, Particle accelerator, center [Galaxy], threshold [energy], MAGIC, gamma ray, Space and Planetary Science, cosmic radiation: galaxy, ddc:520, galaxy [cosmic radiation], Física nuclear, gamma rays: general, gamma rays: ISM, cosmic rays, Astrophysics - High Energy Astrophysical Phenomena
Abstract: [Aims] In the presence of a sufficient amount of target material, γ-rays can be used as a tracer in the search for sources of Galactic cosmic rays (CRs). Here we present deep observations of the Galactic center (GC) region with the MAGIC telescopes and use them to infer the underlying CR distribution and to study the alleged PeV proton accelerator at the center of our Galaxy., [Methods] We used data from ≈100 h observations of the GC region conducted with the MAGIC telescopes over five years (from 2012 to 2017). Those were collected at high zenith angles (58−70 deg), leading to a larger energy threshold, but also an increased effective collection area compared to low zenith observations. Using recently developed software tools, we derived the instrument response and background models required for extracting the diffuse emission in the region. We used existing measurements of the gas distribution in the GC region to derive the underlying distribution of CRs. We present a discussion of the associated biases and limitations of such an approach., [Results] We obtain a significant detection for all four model components used to fit our data (Sgr A*, “Arc”, G0.9+0.1, and an extended component for the Galactic Ridge). We observe no significant difference between the γ-ray spectra of the immediate GC surroundings, which we model as a point source (Sgr A*) and the Galactic Ridge. The latter can be described as a power-law with index 2 and an exponential cut-off at around 20 TeV with the significance of the cut-off being only 2σ. The derived cosmic-ray profile hints to a peak at the GC position and with a measured profile index of 1.2 ± 0.3 is consistent with the 1/r radial distance scaling law, which supports the hypothesis of a CR accelerator at the GC. We argue that the measurements of this profile are presently limited by our knowledge of the gas distribution in the GC vicinity., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, FPA2017-90566-REDC), the Indian Department of Atomic Energy, the Japanese JSPS and MEXT, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Center grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ.
Published: 2020

27. Study of the variable broadband emission of Markarian 501 during the most extreme Swift X-ray activity

Author: Francesco Longo, Yuki Iwamura, Susumu Inoue, L. Nogués, M. I. Martínez, G. Pedaletti, Thomas Bretz, J. Buss, A. Rugliancich, Marina Manganaro, D. Galindo, Merja Tornikoski, Sabrina Einecke, Martin Makariev, Oscar Blanch, C. Leto, Ciro Bigongiari, Adrian Biland, D. Zarić, Andrii Neronov, M. Garczarczyk, Sargis Gasparyan, Konstancja Satalecka, Michele Doro, Marc Ribó, M. Noethe, J. Becerra González, Kazuma Ishio, J. Rico, Christian Fruck, Kyoshi Nishijima, Abelardo Moralejo, E. Moretti, Wolfgang Rhode, Christoph Wendel, Dominik Baack, Satoshi Masuda, Hidetoshi Kubo, Nikola Godinovic, B. Machado de Oliveira Fraga, Alexander Hahn, Manuel Delfino, Daniela Dorner, P. Giammaria, A. Niedzwiecki, Alessio Berti, U. Barres de Almeida, F. Verrecchia, G. Busetto, Lena Linhoff, D. Fidalgo, Damir Lelas, G. Ferrara, Alicia Fattorini, D. Hildebrand, David Paneque, V. A. Acciari, Bernd Schleicher, Gaia Vanzo, M. Peresano, Rodolfo Carosi, M. Perri, Alessandra Lamastra, John Hoang, Marcel Strzys, M. Gaug, Chiara Righi, M. Armas Padilla, D. Ninci, Ana Babić, Michael Blank, Dorota Sobczyńska, D. Dominis Prester, A. De Angelis, Vitaly Neustroev, I. Snidaric, F. Schulz, E. von Willert, D. Guberman, A. Y. Lien, J. Herrera, Juan Abel Barrio, B. Banerjee, J. van Scherpenberg, V. D'Elia, Narek Sahakyan, P. Temnikov, Stefano Ansoldi, R. J. García López, G. Maneva, E. Do Souto Espiñera, B. De Lotto, Elisa Bernardini, Riccardo Paoletti, S. Paiano, Karl Mannheim, Pablo Peñil, A. Shukla, Ivica Puljak, Jose Luis Contreras, D. Neise, Andrea Tramacere, Manuela Mallamaci, A. López-Oramas, Jordi Delgado, V. Fallah Ramazani, Juan Cortina, J. Palacio, P. Colin, R. Walter, J. M. Paredes, F. Di Pierro, Antonio Stamerra, Pratik Majumdar, Camilla Maggio, M. V. Fonseca, Ievgen Vovk, Francesco Dazzi, A. Fernández-Barral, Cosimo Nigro, P. Munar-Adrover, Massimo Persic, Dario Hrupec, L. A. Antonelli, Martin Will, D. Kuveždić, T. Schweizer, F. Leone, Anne Lähteenmäki, Tarek M. Hassan, Fabrizio Tavecchio, Masahiro Teshima, A. Somero, Kari Nilsson, Ll. Font, M. Bulinski, Wlodek Bednarek, Vitalii Sliusar, P. G. Prada Moroni, Junko Kushida, P. Da Vela, E. Prandini, N. Torres-Albà, Joni Tammi, Sebastian Achim Mueller, J. R. Garcia, Giacomo Bonnoli, Manuel Doerr, Stefano Gallozzi, Jose Miguel Miranda, Wrijupan Bhattacharyya, Julian Sitarek, T. Surić, Shimpei Tsujimoto, K. Bruegge, D. Elsaesser, Tomislav Terzić, Jürgen Besenrieder, E. Molina, E. Colombo, Lab Saha, Luca Foffano, Mosè Mariotti, A. Paravac, Saverio Lombardi, M. Nievas Rosillo, M. Minev, M. Balbo, D. Hadasch, R. Mirzoyan, A. Arbet-Engels, K. Sedlaczek, L. Maraschi, Elina Lindfors, Daniel Mazin, Stefan Cikota, M. Vazquez Acosta, Victoria Moreno, Stefano Covino, Tomoki Saito, Giovanni Ceribella, Aaron Dominguez, K. Noda, Sidika Merve Colak, M. López, German Research Foundation, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Astrofisica, Swiss National Science Foundation, Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Croatian Science Foundation, University of Rijeka, Polish National Agency for Academic Exchange, Ministério da Ciência, Tecnologia e Inovação (Brasil), National Aeronautics and Space Administration (US), Department of Energy (US), Commissariat à l'Ènergie Atomique et aux Ènergies Alternatives (France), Centre National de la Recherche Scientifique (France), Institut National de Physique Nucléaire et de Physique des Particules (France), Agenzia Spaziale Italiana, High Energy Accelerator Research Organization (Japan), Japan Aerospace Exploration Agency, Knut and Alice Wallenberg Foundation, Swedish Research Council, Swedish National Space Board, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Babic, A., Banerjee, B., Barres De Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Blanch, O., Bonnoli, G., Busetto, G., Carosi, R., Ceribella, G., Cikota, S., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., DI Pierro, F., Do Souto Espinera, E., Dominguez, A., Dominis Prester, D., Doro, M., Fallah Ramazani, V., Fattorini, A., Fernandez-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giammaria, P., Godinovic, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuvecdic, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Oramas, A., MacHado De Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Maraschi, L., Mariotti, M., Martinez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Suric, T., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tsujimoto, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vovk, I., Will, M., Zaric, D., Arbet-Engels, A., Baack, D., Balbo, M., Biland, A., Blank, M., Bretz, T., Bruegge, K., Bulinski, M., Buss, J., Doerr, M., Dorner, D., Einecke, S., Elsaesser, D., Hildebrand, D., Linhoff, L., Mannheim, K., Mueller, S., Neise, D., Neronov, A., Noethe, M., Paravac, A., Rhode, W., Schleicher, B., Schulz, F., Sedlaczek, K., Shukla, A., Sliusar, V., Von Willert, E., Walter, R., Wendel, C., Tramacere, A., Lien, A., Perri, M., Verrecchia, F., Armas Padilla, M., Leto, C., Lahteenmaki, A., Tornikoski, M., Tammi, J., Department of Electronics and Nanoengineering, Metsähovi Radio Observatory, Aalto-yliopisto, and Aalto University
Subjects: galaxies: active, BL Lacertae objects: individual: Mrk 501, gamma rays: galaxies, X-rays: galaxies, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, Context (language use), Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, Power law, Spectral line, Galaxies: active, Gamma rays: galaxies, individual: Mrk 501 [BL Lacertae objects], 0103 physical sciences, MAGIC (telescope), Blazar, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, galaxie [Gamma rays], 010308 nuclear & particles physics, Gamma ray, Astronomy and Astrophysics, galaxies [X-rays], Crab Nebula, Space and Planetary Science, active [galaxies], galaxies [gamma rays], ddc:520, Física nuclear, High Energy Astrophysical Phenomena, Astrophysics - High Energy Astrophysical Phenomena
Abstract: [Context] Markarian 501 (Mrk 501) is a very high-energy (VHE) gamma-ray blazar located at z = 0:034, which is regularly monitored by a wide range of multi-wavelength instruments, from radio to VHE gamma rays. During a period of almost two weeks in July 2014, the highest X-ray activity of Mrk 501 was observed in -14 years of operation of the Neil Gehrels Swift Gamma-ray Burst Observatory., [Aims] We characterize the broadband variability of Mrk 501 from radio to VHE gamma rays during the most extreme X-ray activity measured in the last 14 years, and evaluate whether it can be interpreted within theoretical scenarios widely used to explain the broadband emission from blazars., [Methods] The emission of Mrk 501 was measured at radio with Metsähovi, at optical–UV with KVA and Swift/UVOT, at X-ray with Swift/XRT and Swift/BAT, at gamma ray with Fermi-LAT, and at VHE gamma rays with the FACT and MAGIC telescopes. The multi-band variability and correlations were quantified, and the broadband spectral energy distributions (SEDs) were compared with predictions from theoretical models., [Results] The VHE emission of Mrk 501 was found to be elevated during the X-ray outburst, with a gamma-ray flux above 0.15 TeV varying from ∼0.5 to ∼2 times the Crab nebula flux. The X-ray and VHE emission both varied on timescales of 1 day and were found to be correlated. We measured a general increase in the fractional variability with energy, with the VHE variability being twice as large as the X-ray variability. The temporal evolution of the most prominent and variable segments of the SED, characterized on a day-by-day basis from 2014 July 16 to 2014 July 31, is described with a one-zone synchrotron self-Compton model with variations in the break energy of the electron energy distribution (EED), and with some adjustments in the magnetic field strength and spectral shape of the EED. These results suggest that the main flux variations during this extreme X-ray outburst are produced by the acceleration and the cooling of the high-energy electrons. A narrow feature at ∼3 TeV was observed in the VHE spectrum measured on 2014 July 19 (MJD 56857.98), which is the day with the highest X-ray flux (>0.3 keV) measured during the entire Swift mission. This feature is inconsistent with the classical analytic functions to describe the measured VHE spectra (power law, log-parabola, and log-parabola with exponential cutoff) at more than 3σ. A fit with a log-parabola plus a narrow component is preferred over the fit with a single log-parabola at more than 4σ, and a dedicated Monte Carlo simulation estimated the significance of this extra component to be larger than 3σ. Under the assumption that this VHE spectral feature is real, we show that it can be reproduced with three distinct theoretical scenarios: (a) a pileup in the EED due to stochastic acceleration; (b) a structured jet with two-SSC emitting regions, with one region dominated by an extremely narrow EED; and (c) an emission from an IC pair cascade induced by electrons accelerated in a magnetospheric vacuum gap, in addition to the SSC emission from a more conventional region along the jet of Mrk 501., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, FPA2017-90566-REDC), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The Fermi-LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat à l’Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucléaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Instituto Nazionale di Astrofisica in Italy and the Centre National d’Études Spatiales in France. The important contributions from ETH Zurich grants ETH-10.08-2 and ETH-27.12-1 as well as the funding by the Swiss SNF and the German BMBF (Ver-bundforschung Astro-und Astroteilchenphysik) and HAP (Helmoltz Alliance for Astroparticle Physics) are gratefully acknowledged. Part of this work is supported by Deutsche Forschungsgemeinschaft (DFG) within the Collaborative Research Center SFB 876, project C3. We thank the Instituto de Astrofisica de Canarias for allowing us to operate the telescope at the Observatorio del Roque de los Muchachos in La Palma, the Max-Planck-Institut fur Physik for providing us with the mount of the former HEGRA CT3 telescope, and the MAGIC Collaboration for their support. JBG acknowledges the support of the Viera y Clavijo program funded by ACIISI and ULL. C. W. is grateful for the support by the project “Promotion inklusive” of the Universität zu Köln and the German Bundesmin-isterium für Arbeit und Soziales. This publication makes use of data obtained at Metsähovi Radio Observatory, operated by Aalto University, Finland.
Published: 2020

28. A search for dark matter in Triangulum II with the MAGIC telescopes

Author: Satoshi Fukami, Alice Donini, F. Leone, Lorenzo Bellizzi, Wlodek Bednarek, Masahiro Teshima, M. Palatiello, N. Torres-Albà, Daniela Dorner, D. Dominis Prester, Pablo Peñil, Fabrizio Tavecchio, Gaia Vanzo, Francesco Dazzi, Ll. Font, Kari Nilsson, V. Vitale, Valerio Vagelli, Nikola Godinovic, Jose Miguel Miranda, E. Prandini, Christian Fruck, G. Busetto, Yating Chai, D. Miceli, V. Fallah Ramazani, Stefan Cikota, Jordi Delgado, Pawel Gliwny, M. Vazquez Acosta, M. Gaug, A. Somero, G. Ferrara, Manuel Delfino, D. Zarić, Victoria Moreno, L. Nogués, Jarred Gershon Green, Adrian Biland, Cosimo Nigro, F. Di Pierro, Ž. Bošnjak, J. Herrera, Giacomo Bonnoli, D. Ninci, P. G. Prada Moroni, E. Molina, Francesco Longo, John Hoang, Chiara Righi, E. Colombo, Ana Babić, Serena Loporchio, D. Fidalgo, I. Snidaric, Lab Saha, Luca Foffano, Razmik Mirzoyan, U. Barres de Almeida, J. van Scherpenberg, Elisa Bernardini, Stefano Ansoldi, Tjark Miener, David Paneque, U. Colin, David A. Green, J. Kushida, V. D'Elia, Daniel Morcuende, Jose Luis Contreras, Juan Cortina, P. Temnikov, Alexander Hahn, Juan Abel Barrio, J. Rico, Riccardo Paoletti, Alessandra Lamastra, L. Di Venere, M. Peresano, D. Guberman, Narek Sahakyan, Damir Lelas, Francesco Gabriele Saturni, Dorota Sobczyńska, Léa Jouvin, B. De Lotto, S. Nozaki, Stefano Covino, B. Banerjee, Wrijupan Bhattacharyya, Shunsuke Sakurai, D. Strom, Kai Phillip Schmidt, K. Noda, P. Da Vela, J. Palacio, Martin Makariev, E. Do Souto Espiñeira, Tomislav Terzić, Ivica Puljak, Oscar Blanch, Dario Hrupec, Sidika Merve Colak, D. Hadasch, Davide Depaoli, M. A. Lopez, J. Becerra González, D. Elsaesser, J. M. Paredes, Antonio Stamerra, Mitsunari Takahashi, P. Munar-Adrover, Victor A. Acciari, Abelardo Moralejo, Ievgen Vovk, Camilla Maggio, E. Moretti, Pratik Majumdar, M. V. Fonseca, Mosè Mariotti, Moritz Hütten, Julian Sitarek, A. Arbet Engels, A. De Angelis, Vitaly Neustroev, Sargis Gasparyan, Yuki Iwamura, Martin Will, A. Rugliancich, Marina Manganaro, Saverio Lombardi, A. López-Oramas, Susumu Inoue, Alessio Berti, Luca Tosti, S. Mićanović, K. Nishijima, L. A. Antonelli, Jürgen Besenrieder, T. Schweizer, M. Minev, Ferdinando Giordano, Toshiaki Inada, Wolfgang Rhode, Konstancja Satalecka, Manuela Mallamaci, G. Maneva, Michele Doro, Yusuke Suda, Carlo Vigorito, Ciro Bigongiari, T. Surić, S. Paiano, M. Garczarczyk, Karl Mannheim, R. López-Coto, Daniel Kerszberg, Tomoki Saito, Giovanni Ceribella, Kazuma Ishio, Rodolfo Carosi, Dominik Baack, Ashot Chilingarian, L. Maraschi, Elina Lindfors, Marc Ribó, Daniel Mazin, Hidetoshi Kubo, Alicia Fattorini, M. I. Martínez, B. Machado de Oliveira Fraga, N. Giglietto, R. J. García López, Massimo Persic, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Baack, D., Babic, A., Banerjee, B., Barres de Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Green, J. G., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kerszberg, D., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Micanovic, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nozaki, S., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strom, D., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tosti, L., Vagelli, V., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., and Zaric, D.
Subjects: Dwarf spheroidal satellite galaxies, Astrophysics, 7. Clean energy, 01 natural sciences, dark matter [WIMP], Imaging air Cherenkov telescopes, High Energy Physics - Phenomenology (hep-ph), WIMP, Dwarf spheroidal satellite galaxie, flux [gamma ray], Triangulum II, annihilation [WIMP], 010303 astronomy & astrophysics, Physics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, scaling, density [dark matter], hep-ph, halo [dark matter], High Energy Physics - Phenomenology, Dark matter, Indirect searches, kinematics, Física nuclear, Halo, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics and Astronomy, Milky Way, satellite, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, GeneralLiterature_MISCELLANEOUS, VHE, annihilation [down], 0103 physical sciences, Imaging air Cherenkov telescope, Indirect searche, ddc:530, Astrophysics::Galaxy Astrophysics, Particle Physics - Phenomenology, Triangulum, 010308 nuclear & particles physics, ComputingMilieux_PERSONALCOMPUTING, Astronomy and Astrophysics, MAGIC, Galaxy, Dark matter halo, annihilation [cross section], Space and Planetary Science, galaxy
Abstract: MAGIC Collaboration: et al., arXiv:2003.05260v1, We present the first results from very-high-energy observations of the dwarf spheroidal satellite candidate Triangulum II with the MAGIC telescopes from 62.4 hours of good-quality data taken between August 2016 and August 2017. We find no gamma-ray excess in the direction of Triangulum II, and upper limits on both the differential and integral gamma-ray flux are presented. Currently, the kinematics of Triangulum II are affected by large uncertainties leading to a bias in the determination of the properties of its dark matter halo. Using a scaling relation between the annihilation J -factor and heliocentric distance of well-known dwarf spheroidal galaxies, we estimate an annihilation J -factor for Triangulum II for WIMP dark matter of log[Jann(0.5◦)/ GeV2cm−5] = 19.35±0.37. We also derive a dark matter density profile for the object relying on results from resolved simulations of Milky Way sized dark matter halos. We obtain 95% confidence-level limits on the thermally averaged annihilation cross section for WIMP annihilation into various Standard Model channels. The most stringent limits are obtained in the τ−τ+final state, where a cross section for annihilation down to hσannvi = 3.05 × 10−24cm3s−1is excluded., The financial support of the German BMBF and MPG, Germany, the Italian INFN and INAF, Italy, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2017-87859-P, FPA2017-85668-P, FPA2017-82729-C6-2-R, FPA2017-82729-C6-6-R, FPA2017-82729-C6-5-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2017-87055-C2-2-P, FPA2017-90566-REDC), the Indian Department of Atomic Energy, the Japanese JSPS, Japan and MEXT, Japan, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO1-153/28.08.2018 and the Academy of Finland grant nr. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2016-0588 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka, Croatia Project 13.12.1.3.02, by the DFG, Germany Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre, Polland grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq, Brazil and FAPERJ, Brazil .
Published: 2020

29. Statistics of VHE gamma-Rays in Temporal Association with Radio Giant Pulses from the Crab Pulsar

Author: J. Palacio, J. M. Paredes, Antonio Stamerra, L. Maraschi, Elina Lindfors, Daniel Mazin, Chiara Righi, Wlodek Bednarek, Alessandro Carosi, P. Temnikov, Pratik Majumdar, N. Torres-Albà, M. V. Fonseca, S. N. Shore, Martin Will, Jose Miguel Miranda, E. Colombo, E. Prandini, Aaron Dominguez, Kari Nilsson, L. O. Takalo, Francesco Longo, Juan Abel Barrio, Masahiro Teshima, Nikola Godinovic, U. Menzel, L. A. Antonelli, Mosè Mariotti, D. Hadasch, J. E. Ward, Alba Fernández-Barral, M. Engelkemeier, Stefano Covino, Martin Makariev, Alexander Hahn, P. Colin, Saverio Lombardi, Andrea Rugliancich, Sidika Merve Colak, Oscar Blanch, Arka Chatterjee, Adrian Biland, Christian Fruck, Tomoki Saito, M. Doert, T. Surić, Shimpei Tsujimoto, M. Garczarczyk, Ana Babić, D. Fidalgo, M. Peresano, Camilla Maggio, J. Rico, S. Schroeder, Ivica Puljak, Ievgen Vovk, M. Vazquez Acosta, D. Dominis Prester, Tarek M. Hassan, B. Biasuzzi, Victoria Moreno, Fabrizio Tavecchio, L. Nogués, E. Moretti, D. Kuveždić, Jose Luis Contreras, Abelardo Moralejo, F. Di Pierro, Yusuke Konno, Juan Cortina, T. Schweizer, J. R. Garcia, Giacomo Bonnoli, A. De Angelis, A. Treves, Vitaly Neustroev, V. Fallah Ramazani, Max Ludwig Ahnen, Wrijupan Bhattacharyya, T. Nagayoshi, Daniela Dorner, Dariusz Gora, Gaia Vanzo, G. Maneva, Junko Kushida, P. Da Vela, Kyoshi Nishijima, U. Barres de Almeida, M. Minev, I. Reichardt, P. Giammaria, A. Niedzwiecki, R. Smits, M. Gaug, Damir Lelas, D. Elsaesser, I. Snidaric, Dorota Sobczyńska, J. Herrera, B. De Lotto, Julian Sitarek, Koji Noda, J. Hose, Elisa Bernardini, Stefano Ansoldi, David Paneque, M. I. Martínez, Riccardo Paoletti, D. Guberman, Marina Manganaro, Sabrina Einecke, D. Galindo, P. Cumani, Konstancja Satalecka, Michele Doro, Dario Hrupec, M. A. Lopez, S. Paiano, Karl Mannheim, P. G. Prada Moroni, Tomislav Terzić, Francesco Dazzi, J. Becerra González, Alessio Berti, Natalia Lewandowska, L. Perri, D. Eisenacher Glawion, Cosimo Nigro, M. Nievas Rosillo, B. Banerjee, C. Arcaro, Lluis Font, Marcel Strzys, R. J. García López, G. Pedaletti, Massimo Persic, Wolfgang Rhode, D. Ninci, M. Hayashida, D. Zarić, Marc Ribó, P. Bangale, Hidetoshi Kubo, R. Mirzoyan, Kazuma Ishio, Rodolfo Carosi, German Research Foundation, Istituto Nazionale di Fisica Nucleare, Istituto Nazionale di Astrofisica, Swiss National Science Foundation, Ministerio de Economía y Competitividad (España), Japan Society for the Promotion of Science, Ministry of Education, Culture, Sports, Science and Technology (Japan), Universidad de Barcelona, Croatian Science Foundation, University of Rijeka, Foundation for Polish Science, Ministério da Ciência, Tecnologia e Inovação (Brasil), Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bernardini, E., Berti, A., Bhattacharyya, W., Biasuzzi, B., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Di Pierro, F., Doert, M., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernandez-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Garcia Lopez, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinovic, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuvez Dic, D., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Shore, S. N., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Strzys, M., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Treves, A., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zaric, D., and Smits, R.
Subjects: Photon, Radiation mechanisms: non-thermal, Radio continuum: stars, VHE [gamma ray], Astrophysics, 01 natural sciences, Cherenkov, individual, 010303 astronomy & astrophysics, Pulsars: individual: Crab pulsar, pulsar, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), photon, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, imaging, pulsed, Gamma rays: stars, pulsars: individual: Crab pulsar - gamma-rays: stars - radio continuum: stars - radiation mechanics: non-thermal, detector [radio wave], statistics, Crab pulsar, Global Positioning System, stars [Radio continuum], Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, stars, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, pulsars, gamma rays, radio continuum, radiation mechanisms, non-thermal, Astrophysics::Cosmology and Extragalactic Astrophysics, Radio telescope, star [Gamma rays], Pulsar, emission [gamma ray], 0103 physical sciences, 010306 general physics, enhancement, Astrophysics::Galaxy Astrophysics, Cherenkov radiation, non-thermal [Radiation mechanisms], business.industry, Crab Pulsar, stars [Gamma rays], Astronomy and Astrophysics, individual: Crab pulsar [Pulsars], MAGIC, flux, Stars, Space and Planetary Science, correlation, ddc:520, business, statistical
Abstract: [Aims] The aim of this study is to search for evidence of a common emission engine between radio giant pulses (GPs) and very-high-energy (VHE, E > 100 GeV) γ-rays from the Crab pulsar., [Methods] We performed 16 h of simultaneous observations of the Crab pulsar at 1.4 GHz with the Effelsberg radio telescope and the Westerbork Synthesis Radio Telescope (WSRT), and at energies above 60 GeV we used the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes. We searched for a statistical correlation between the radio and VHE γ-ray emission with search windows of different lengths and different time lags to the arrival times of a radio GP. A dedicated search for an enhancement in the number of VHE γ-rays correlated with the occurrence of radio GPs was carried out separately for the P1 and P2 phase ranges, respectively., [Results] In the radio data sample, 99444 radio GPs were detected. We find no significant correlation between the GPs and VHE photons in any of the search windows. Depending on phase cuts and the chosen search windows, we find upper limits at a 95% confidence level on an increase in VHE γ-ray events correlated with radio GPs between 7% and 61% of the average Crab pulsar VHE flux for the P1 and P2 phase ranges, respectively. This puts upper limits on the flux increase during a radio GP between 12% and 2900% of the pulsed VHE flux, depending on the search window duration and phase cuts. This is the most stringent upper limit on a correlation between γ-ray emission and radio GPs reported so far., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project 09/176 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ.
Published: 2019
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30. Testing emission models on the extreme blazar 2WHSP J073326.7+515354 detected at very high energies with the MAGIC telescopes

Author: Adrian Biland, J. Becerra González, J. Rico, Satoshi Fukami, Alessandra Lamastra, D. Mazin, G. Busetto, L. Di Venere, Alessio Berti, F. Leone, Neustroev, Kazuma Ishio, R. Mirzoyan, Rodolfo Carosi, Mosè Mariotti, Masahiro Teshima, Manuela Mallamaci, Sargis Gasparyan, Léa Jouvin, John Hoang, Cosimo Nigro, F. D'Ammando, A. Somero, Wolfgang Rhode, L. Nogués, A. Arbet Engels, Juan Abel Barrio, M. Minev, D. Dominis Prester, Giacomo Bonnoli, Stefano Covino, A. López-Oramas, Narek Sahakyan, Daniela Dorner, Luca Tosti, Julian Sitarek, Fallah Ramazani, Tihomir Surić, Pablo Peñil, Lorenzo Bellizzi, Gaia Vanzo, M. Gaug, D. Fidalgo, P. G. Prada Moroni, K. Nishijima, Daniela Hadasch, Francesco Longo, Alicia Fattorini, Tomoki Saito, Giovanni Ceribella, G. Maneva, U. Barres de Almeida, Damir Lelas, S. Paiano, Karl Mannheim, R. J. García López, Katsuaki Asano, David Paneque, Saverio Lombardi, D. Ninci, Wrijupan Bhattacharyya, Koji Noda, Chiara Righi, M. Peresano, Daniel Kerszberg, Pratik Majumdar, D. Guberman, Dorota Sobczyńska, Matteo Cerruti, V. A. Acciari, Yuki Iwamura, Susumu Inoue, Elisa Bernardini, Wlodek Bednarek, M. V. Fonseca, P. Temnikov, A. Rugliancich, Martin Makariev, Marina Manganaro, G. Ferrara, L. Maraschi, Elina Lindfors, Martin Will, D. Zarić, Oscar Blanch, Nikola Godinovic, D. Strom, E. Do Souto Espiñeira, N. Torres-Albà, Ferdinando Giordano, Jordi Delgado, U. Colin, David A. Green, Marc Ribó, M. Palatiello, F. Di Pierro, Ž. Bošnjak, Ivica Puljak, Tomislav Terzić, Alexander Hahn, D. Elsaesser, Toshiaki Inada, B. Banerjee, Shunsuke Sakurai, Kevin Schmidt, Dario Hrupec, E. Molina, Hidetoshi Kubo, M. A. Lopez, Konstancja Satalecka, M. I. Martínez, Michele Doro, Francesco Dazzi, E. Colombo, A. De Angelis, Mitsunari Takahashi, Lab Saha, Luca Foffano, P. Munar-Adrover, Massimo Persic, Stefano Ansoldi, Davide Depaoli, Yating Chai, Junko Kushida, Stefan Cikota, P. Da Vela, Jose Miguel Miranda, Vitale, Riccardo Paoletti, J. van Scherpenberg, Sasa Micanovic, B. Machado de Oliveira Fraga, J. Palacio, E. Prandini, M. Vazquez Acosta, J. M. Paredes, Antonio Stamerra, Moritz Hütten, Vagelli, A. Chilingaryan, Ievgen Vovk, Dominik Baack, Marcel Strzys, Jose Carlos Herrera, Jürgen Besenrieder, T. Schweizer, D’Elia, Camilla Maggio, Christian Fruck, N. Giglietto, Moreno, Yusuke Suda, Carlo Vigorito, Sidika Merve Colak, Manuel Delfino, Alice Donini, L. A. Antonelli, Ana Babić, R. Clavero, Daniel Morcuende, Jose Luis Contreras, Juan Cortina, Fabrizio Tavecchio, Ll. Font, I. Snidaric, Kari Nilsson, D. Miceli, Serena Loporchio, Abelardo Moralejo, E. Moretti, B. De Lotto, S. Nozaki, Ciro Bigongiari, M. Garczarczyk, R. López-Coto, ITA, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Baack, D., Babic, A., Banerjee, B., Barres de Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingaryan, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., da Vela, P., Dazzi, F., de Angelis, A., de Lotto, B., Delfino, M., Delgado, J., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Godinovic, N., Green, D., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kerszberg, D., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Micanovic, S., Miceli, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nozaki, S., Paiano, S., Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tosti, L., Vagelli, V., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Zaric, D., Asano, K., D'Ammando, F., and Clavero, R.
Subjects: Astrophysics and Astronomy, galaxie [Gamma-rays], active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, astro-ph.HE, Context (language use), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Jet (particle physics), X-rays: general, 01 natural sciences, 7. Clean energy, law.invention, law, general [X-rays], 0103 physical sciences, MAGIC (telescope), Blazar, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, general [BL Lacertae objects], Gamma ray, BL Lacertae objects: general - galaxies: active - gamma-rays: galaxies - X-rays: general, Astronomy and Astrophysics, alaxies: active, BL Lacertae objects: general, gamma-rays: gala, Galaxies: active, Synchrotron, galaxies [gamma-rays], 13. Climate action, Space and Planetary Science, Spectral energy distribution, ddc:520, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, Gamma-rays: galaxies
Abstract: Extreme high-energy peaked BL Lac objects (EHBLs) are an emerging class of blazars. Their typical two-hump structured spectral energy distribution (SED) peaks at higher energies with respect to conventional blazars. Multi-wavelength (MWL) observations constrain their synchrotron peak in the medium to hard X-ray band. Their gamma-ray SED peaks above the GeV band, and in some objects it extends up to several TeV. Up to now, only a few EHBLs have been detected in the TeV gamma-ray range. In this paper, we report the detection of the EHBL 2WHSP J073326.7+515354, observed and detected during 2018 in TeV gamma rays with the MAGIC telescopes. The broad-band SED is studied within a MWL context, including an analysis of the Fermi-LAT data over ten years of observation and with simultaneous Swift-XRT, Swift-UVOT, and KVA data. Our analysis results in a set of spectral parameters that confirms the classification of the source as an EHBL. In order to investigate the physical nature of this extreme emission, different theoretical frameworks were tested to model the broad-band SED. The hard TeV spectrum of 2WHSP J073326.7+515354 sets the SED far from the energy equipartition regime in the standard one-zone leptonic scenario of blazar emission. Conversely, more complex models of the jet, represented by either a two-zone spine-layer model or a hadronic emission model, better represent the broad-band SED., MNRAS published
Published: 2019

31. Deep observations of the globular cluster M15 with the MAGIC telescopes

Author: B. Machado de Oliveira Fraga, A. Lamastra, Jordi Delgado, P. Giammaria, Razmik Mirzoyan, D. Baack, D. Galindo, Massimo Persic, John Hoang, E. Moretti, J. Palacio, Pablo Peñil, Chiara Righi, A. Hahn, R. J. García López, Kari Nilsson, P. Majumdar, J. M. Paredes, Antonio Stamerra, J. Becerra González, Dorota Sobczyńska, Francesco Longo, Satoshi Masuda, D. Dominis Prester, Adrian Biland, S. Gasparyan, Y. Iwamura, M. Strzys, J. Kushida, S. M. Colak, Abelardo Moralejo, Jose Luis Contreras, Juan Cortina, A. Fernández-Barral, N. Godinović, Takashi Saito, Pierre Colin, Tihomir Surić, Francesco Leone, W. Rhode, M. V. Fonseca, I. Puljak, P G Prada Moroni, N. Sahakyan, W. Bhattacharyya, V. Fallah Ramazani, J. Rico, P. Munar-Adrover, Oscar Blanch, A. Somero, Saverio Lombardi, Louis Antonelli, U. Barres de Almeida, A. Niedzwiecki, D. Fidalgo, M. Will, David H. Green, Edgar Molina, V. D'Elia, E. Colombo, S. Gallozzi, A. De Angelis, G. Vanzo, Petar Temnikov, Koji Noda, Ana Babić, Stefan Cikota, A. Fattorini, D. Ninci, Shimpei Tsujimoto, M. I. Martínez, M. Vazquez Acosta, Stefano Ansoldi, Elisa Bernardini, Masahiro Teshima, M. Peresano, Giovanni Busetto, M. Mallamaci, F. Di Pierro, Lab Saha, B. De Lotto, D. Dorner, Markus Gaug, M. López, Elisa Prandini, A. Arbet Engels, D. Hadasch, Sabrina Einecke, Victoria Moreno, D. Kuveždić, Julian Sitarek, Rodolfo Carosi, D. Lelas, Vitaly Neustroev, Francesco Dazzi, Darko Zarić, Jürgen Besenrieder, K. Mannheim, Juan Abel Barrio, D. Elsaesser, I. Vovk, M. Makariev, Ciro Bigongiari, Aaron Dominguez, M. Nöthe, S. Paiano, B. Banerjee, K. Ishio, C. Nigro, G. Ceribella, G. Pedaletti, W. Bednarek, C. Maggio, G. Maneva, E. Do Souto Espiñera, Fabrizio Tavecchio, Ll. Font, Tomislav Terzić, Susumu Inoue, M. Nievas Rosillo, Dario Hrupec, R. Paoletti, A. López-Oramas, L. Foffano, L. Maraschi, M. Delfino, Marc Ribó, Jose Carlos Herrera, Elina Lindfors, Daniel Mazin, A. Berti, J. R. Garcia, Stefano Covino, M. Minev, Hidetoshi Kubo, G. Bonnoli, T. Schweizer, L. Nogués, M. Mariotti, M. Garczarczyk, V. A. Acciari, J. van Scherpenberg, K. Nishijima, P. Da Vela, Iva Šnidarić, A. Rugliancich, Marina Manganaro, G. Ferrara, D. Paneque, Konstancja Satalecka, Michele Doro, C. Fruck, D. Guberman, N. Torres-Albà, Jose Miguel Miranda, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Baack, D., Babic, A., Banerjee, B., Barres De Almeida, U., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Busetto, G., Carosi, R., Ceribella, G., Cikota, S., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Do Souto Espinera, E., Dominguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernandez-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., Garcia Lopez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giammaria, P., Godinovic, N., Green, D., Guberman, D., Hadasch, D., Hahn, A., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuvezdic, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Oramas, A., Machado De Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nothe, M., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Penil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Suric, T., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tsujimoto, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vovk, I., Will, M., and Zaric, D.
Subjects: Radiation mechanisms: non-thermal, Astrophysics::High Energy Astrophysical Phenomena, Population, general [Pulsars], Globular clusters: general, FOS: Physical sciences, astro-ph.HE, Astrophysics, 01 natural sciences, 7. Clean energy, stars [gamma-rays], Pulsar, Millisecond pulsar, 0103 physical sciences, Gamma-rays: stars, Globular clusters: individual: M15, Pulsars: general, Astronomy and Astrophysics, Space and Planetary Science, Astrophysics::Solar and Stellar Astrophysics, star [Gamma-rays], education, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, education.field_of_study, individual: M15 [Globular clusters], non-thermal [Radiation mechanisms], 010308 nuclear & particles physics, Compton scattering, Stars, Crab Nebula, Globular cluster, ddc:520, High Energy Physics::Experiment, Electrónica, general [Globular clusters], radiation mechanisms: non-thermal, pulsars: general, globular clusters: general, globular clusters: individual: M15, gamma-rays: stars, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Lepton
Abstract: A population of globular clusters (GCs) has been recently established by the Fermi-LAT telescope as a new class of GeV $\gamma$-ray sources. Leptons accelerated to TeV energies, in the inner magnetospheres of MSPs or in their wind regions, should produce $\gamma$-rays through the inverse Compton scattering in the dense radiation field from the huge population of stars. We have conducted deep observations of the globular cluster M15 with the MAGIC telescopes and used 165 hrs in order to search for $\gamma$-ray emission. A strong upper limit on the TeV $\gamma$-ray flux $, Comment: 11 pages, 7 figures, accepted for publication in MNRAS
Published: 2019

32. Discovery of TeV γ-ray emission from the neighbourhood of the supernova remnant G24.7+0.6 by MAGIC

Author: R. J. García López, P G Prada Moroni, C. Arcaro, M. Vazquez Acosta, Masahiro Teshima, Elina Lindfors, Nikola Godinovic, Victoria Moreno, Daniel Mazin, Saverio Lombardi, A. Fernández-Barral, Chiara Righi, Pratik Majumdar, M. V. Fonseca, L. Nogués, Cosimo Nigro, M. Nievas Rosillo, Lluis Font, D. Dorner, A. Lamastra, M. Minev, R. Zanin, P. Temnikov, D. Elsaesser, J. Palacio, J. M. Paredes, Antonio Stamerra, Marcel Strzys, V. D'Elia, Martin Will, Stefano Covino, D. Zarić, Adrian Biland, D.F. Torres, Dario Hrupec, R. Paoletti, Wrijupan Bhattacharyya, B. Banerjee, A. Fattorini, Marc Ribó, S. Ansoldi, P. Giammaria, M. A. Lopez, Karl Mannheim, P. Bangale, Junko Kushida, J. Delgado, J. Rico, Kyoshi Nishijima, Tomoki Saito, Giovanni Ceribella, Satoshi Masuda, John Hoang, U. Barres de Almeida, Arka Chatterjee, Tarek M. Hassan, Hidetoshi Kubo, S. Paiano, Aaron Dominguez, F. Di Pierro, D. Kuveždić, Jürgen Besenrieder, Alexander Hahn, D. Hadasch, A. Rugliancich, Marina Manganaro, Fabrizio Tavecchio, M. I. Martínez, D. Fidalgo, Juan Abel Barrio, J. Becerra González, J. E. Ward, Damir Lelas, Francesco Longo, I. Snidaric, Sidika Merve Colak, G. Ferrara, E. Colombo, Sabrina Einecke, M. Delfino, Lab Saha, D. Dominis Prester, Alessio Berti, Ievgen Vovk, Louis Antonelli, A. Arbet Engels, S. Gallozzi, Gaia Vanzo, P. Cumani, Konstancja Satalecka, A. De Angelis, D. Ninci, Michele Doro, Dorota Sobczyńska, Martin Makariev, Ana Babić, Oscar Blanch, R. Mirzoyan, Vitaly Neustroev, W. Bednarek, T. Schweizer, Jose Luis Contreras, Christian Fruck, Julian Sitarek, Juan Cortina, J. Herrera, V. Fallah Ramazani, G. Bonnoli, David Paneque, M. Mariotti, Koji Noda, A. López-Oramas, Ivica Puljak, D. Guberman, Elisa Bernardini, G. Pedaletti, G. Maneva, D. Baack, M. Persic, P. Colin, V. A. Acciari, P. Da Vela, L. Foffano, L. Maraschi, Tomislav Terzić, Kari Nilsson, Yuki Iwamura, Susumu Inoue, J. R. Garcia, Camilla Maggio, Kazuma Ishio, E. de Oña Wilhelmi, A. Niedzwiecki, Elisa Prandini, Rodolfo Carosi, M. Peresano, N. Torres-Albà, Jose Miguel Miranda, D. Galindo, Francesco Leone, T. Surić, Shimpei Tsujimoto, Abelardo Moralejo, E. Moretti, Edgar Molina, B. De Lotto, Markus Gaug, Ciro Bigongiari, M. Garczarczyk, W. Rhode, Francesco Dazzi, A. Somero, Pablo Peñil, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., De Almeida, U Barre, Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuveždić, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., López-Oramas, A., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., De Oña Wilhelmi, E., Torres, D. F., and Zanin, R.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, cloud [ISM], ISM:supernova remnants, acceleration of particles, ISM: clouds, cosmic rays, ISM: supernova remnants, gamma-rays: general, astro-ph.HE, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Astronomy and Astrophysics, Space and Planetary Science, 01 natural sciences, Spectral line, 0103 physical sciences, Supernova remnant, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, acceleration of particle, cosmic ray, Cherenkov radiation, Physics, Spectral index, 010308 nuclear & particles physics, supernova remnants [ISM], Spectral density, Astronomy and Astrophysic, acceleration of particles, cosmic rays, ISM:supernova remnants, ISM: clouds, gamma-rays: general, Acceleration of particles, cosmic rays, gamma-rays: general, ISM: clouds, ISM: supernova remnants, Supernova, 13. Climate action, ddc:520, supernova remnant [ISM], Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, clouds [ISM], general [gamma-rays], Radio wave
Abstract: SNR G24.7+0.6 is a 9.5 kyrs radio and $\gamma$-ray supernova remnant evolving in a dense medium. In the GeV regime, SNR G24.7+0.6 (3FHL\,J1834.1--0706e/FGES\,J1834.1--0706) shows a hard spectral index ($\Gamma$$\sim$2) up to $200$\,GeV, which makes it a good candidate to be observed with Cherenkov telescopes such as MAGIC. We observed the field of view of \snr\ with the MAGIC telescopes for a total of 31 hours. We detect very high energy $\gamma$-ray emission from an extended source located 0.34\degr\ away from the center of the radio SNR. The new source, named \mgc\ is detected up to 5\,TeV, and its spectrum is well-represented by a power-law function with spectral index of $2.74 \pm 0.08$. The complexity of the region makes the identification of the origin of the very-high energy emission difficult, however the spectral agreement with the LAT source and overlapping position at less than 1.5$\sigma$ point to a common origin. We analysed 8 years of \fermi-LAT data to extend the spectrum of the source down to 60\,MeV. \fermi-LAT and MAGIC spectra overlap within errors and the global broad band spectrum is described by a power-law with exponential cutoff at $1.9\pm0.5$\,TeV. The detected $\gamma$-ray emission can be interpreted as the results of proton-proton interaction between the supernova and the CO-rich surrounding., Comment: accepted for publication by MNRAS
Published: 2019

33. MAGIC upper limits on the GRB 090102 afterglow

Author: M. Gaug, Elisa Bernardini, Gianluca Giavitto, A. González Muñoz, C. Delgado Mendez, Victor Stamatescu, T. Schweizer, A. De Angelis, Mosè Mariotti, A.-K. Overkemping, D. Dominis Prester, Robert Wagner, L. A. Antonelli, Julian Sitarek, Saverio Lombardi, M. L. Knoetig, P. Antoranz, J. Hose, Natalia Lewandowska, T. Toyama, A. Sillanpää, Nikola Godinovic, Takashi Saito, P. Temnikov, Benito Marcote, Abelardo Moralejo, A. La Barbera, Fabrizio Tavecchio, M. V. Fonseca, A. Bouvier, J. Moldón, D. Garrido Terrats, Konstancja Satalecka, Ll. Font, Reiko Orito, Francisco Prada, W. Idec, Julia Thaele, Michele Doro, M. Palatiello, Dario Hrupec, Jelena Aleksić, M. A. Lopez, E. Colombo, P. Da Vela, V. Scalzotto, Dominik Elsaesser, U. Barres de Almeida, A. Niedzwiecki, M. Doert, Damir Lelas, Fabio Zandanel, Ralph Bock, L. O. Takalo, K. Frantzen, Q. Weitzel, Tihomir Surić, M. Uellenbeck, David Paneque, Francesco Dazzi, Patrick Vogler, Hiroyasu Tajima, I. Snidaric, D. Carreto Fidalgo, Ana Babić, Dorota Sobczyńska, G. De Caneva, U. Menzel, M. Salvati, Stefano Ansoldi, S. Rügamer, Juan Abel Barrio, Riccardo Paoletti, Nina Nowak, Diego F. Torres, A. Herrero, Christian Fruck, S. Partini, M. Hayashida, Francesco Longo, E. Lorenz, S. Paiano, Kari Nilsson, Karl Mannheim, Nijil Mankuzhiyil, K. Berger, P. Munar-Adrover, I. Lozano, D. Hadasch, Giacomo Bonnoli, E. Prandini, J. M. Paredes, M. Garczarczyk, Antonio Stamerra, Silvia Preziuso, Marc Ribó, P. G. Prada Moroni, J. Kushida, Aldo Treves, Jose Luis Contreras, J. Krause, B. De Lotto, Masahiro Teshima, O. Tibolla, Juan Cortina, Martin Makariev, Oscar Blanch, Tomislav Terzić, A. Hadamek, J. Storz, Ivica Puljak, Alicia López-Oramas, Pierre Colin, J. Becerra González, Emanuele Paolo Farina, S. Bonnefoy, Aaron Dominguez, Mario Meucci, R. Mirzoyan, D. Eisenacher, E. Carmona, Daniel Ferenc, Thomas Bretz, S. N. Shore, Wlodek Bednarek, Alessandro Carosi, Ruben Lopez-Coto, Felix Spanier, D. Nakajima, C. Schultz, V. Scapin, Jose Miguel Miranda, F. Borracci, Wolfgang Rhode, Ignasi Reichardt, G. Maneva, R. Zanin, A. Saggion, Adrian Biland, J. Rico, R. Reinthal, L. Maraschi, Elina Lindfors, Daniel Mazin, K. Mallot, R. J. García López, Stefano Covino, S. Sun, Massimo Persic, A. Boller, L. Cossio, D. Tescaro, T. Krähenbühl, K. Saito, J. Masbou, M. I. Martínez, V. Kadenius, S. R. Gozzini, J. Rodriguez Garcia, Daniela Dorner, J., Aleksic, S., Ansoldi, L. A., Antonelli, P., Antoranz, A., Babic, U. B., de Almeida, J. A., Barrio, J. B., Gonzalez, W., Bednarek, K., Berger, E., Bernardini, A., Biland, O., Blanch, R. K., Bock, A., Boller, S., Bonnefoy, G., Bonnoli, F., Borracci, T., Bretz, E., Carmona, A., Carosi, D. C., Fidalgo, P., Colin, E., Colombo, J. L., Contrera, J., Cortina, L., Cossio, S., Covino, P., Da Vela, F., Dazzi, A., De Angeli, G., De Caneva, B., De Lotto, C. D., Mendez, M., Doert, A., Dominguez, D. D., Prester, D., Dorner, M., Doro, D., Eisenacher, D., Elsaesser, E., Farina, D., Ferenc, M. V., Fonseca, L., Font, K., Frantzen, C., Fruck, R. J. G., Lopez, M., Garczarczyk, D. G., Terrat, M., Gaug, G., Giavitto, N., Godinovic, A. G., Munoz, S. R., Gozzini, A., Hadamek, D., Hadasch, A., Herrero, J., Hose, D., Hrupec, W., Idec, V., Kadeniu, M. L., Knoetig, T., Krahenbuhl, J., Krause, J., Kushida, A. L., Barbera, D., Lela, N., Lewandowska, E., Lindfor, S., Lombardi, R., Lopez Coto, M., Lopez, A., Lopez Orama, E., Lorenz, I., Lozano, M., Makariev, K., Mallot, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, B., Marcote, M., Mariotti, M., Martinez, J., Masbou, D., Mazin, U., Menzel, M., Meucci, J. M., Miranda, R., Mirzoyan, J., Moldon, A., Moralejo, P., Munar Adrover, D., Nakajima, A., Niedzwiecki, K., Nilsson, N., Nowak, R., Orito, A., Overkemping, S., Paiano, M., Palatiello, D., Paneque, R., Paoletti, J. M., Parede, S., Partini, M., Persic, F., Prada, P. G. P., Moroni, E., Prandini, S., Preziuso, I., Puljak, I., Reichardt, R., Reinthal, W., Rhode, M., Ribo, J., Rico, J. R., Garcia, S., Rugamer, A., Saggion, K., Saito, T., Saito, M., Salvati, K., Satalecka, V., Scalzotto, V., Scapin, C., Schultz, T., Schweizer, S. N., Shore, A., Sillanpaa, J., Sitarek, I., Snidaric, D., Sobczynska, F., Spanier, V., Stamatescu, A., Stamerra, J., Storz, S., Sun, T., Suric, L., Takalo, F., Tavecchio, P., Temnikov, T., Terzic, D., Tescaro, M., Teshima, J., Thaele, O., Tibolla, D. F., Torre, T., Toyama, A., Treve, M., Uellenbeck, P., Vogler, R. M., Wagner, Q., Weitzel, F., Zandanel, R., Zanin, A., Bouvier, M., Hayashida, H., Tajima, and Longo, Francesco
Subjects: Photon, General, Non-thermal - gamma-ray burst, Radiation mechanisms, Astrophysics::High Energy Astrophysical Phenomena, gamma-ray burst: general, Hadron, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, general [gamma-ray burst], 7. Clean energy, 01 natural sciences, law.invention, Telescope, law, 0103 physical sciences, MAGIC (telescope), 010306 general physics, 010303 astronomy & astrophysics, Cherenkov radiation, High Energy Astrophysical Phenomena (astro-ph.HE), astro-ph.HE, Physics, ta115, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, radiation mechanisms: non-thermal, non-thermal [radiation mechanisms], Afterglow, gamma-rays bursts: general, Space and Planetary Science, ddc:520, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Gamma-ray burst, Fermi Gamma-ray Space Telescope
Abstract: Indications of a GeV component in the emission from GRBs are known since the EGRET observations during the 1990's and they have been confirmed by the data of the Fermi satellite. These results have, however, shown that our understanding of GRB physics is still unsatisfactory. The new generation of Cherenkov observatories and in particular the MAGIC telescope, allow for the first time the possibility to extend the measurement of GRBs from several tens up to hundreds of GeV energy range. Both leptonic and hadronic processes have been suggested to explain the possible GeV/TeV counterpart of GRBs. Observations with ground-based telescopes of very high energy photons (E>30 GeV) from these sources are going to play a key role in discriminating among the different proposed emission mechanisms, which are barely distinguishable at lower energies. MAGIC telescope observations of the GRB 090102 (z=1.547) field and Fermi Large Area Telescope (LAT) data in the same time interval are analysed to derive upper limits of the GeV/TeV emission. We compare these results to the expected emissions evaluated for different processes in the framework of a relativistic blast wave model for the afterglow. Simultaneous upper limits with Fermi and a Cherenkov telescope have been derived for this GRB observation. The results we obtained are compatible with the expected emission although the difficulties in predicting the HE and VHE emission for the afterglow of this event makes it difficult to draw firmer conclusions. Nonetheless, MAGIC sensitivity in the energy range of overlap with space-based instruments (above about 40 GeV) is about one order of magnitude better with respect to Fermi. This makes evident the constraining power of ground-based observations and shows that the MAGIC telescope has reached the required performance to make possible GRB multiwavelength studies in the very high energy range., 8 pages, 5 figures, 2 tables. Submitted to MNRAS
Published: 2014

34. Unraveling the Complex Behavior of Mrk 421 with Simultaneous X-Ray and VHE Observations during an Extreme Flaring Activity in 2013 April

Author: Simonetta Puccetti, D. Dominis Prester, M. Makariev, Alice Donini, Sofia O. Kurtanidze, G. Bonnoli, Julian Sitarek, D. Dorner, Yoshiki Ohtani, J. Becerra González, S. Ventura, S. Ansoldi, L. Nogués, J. Besenrieder, A. Rugliancich, P. Munar-Adrover, Jose Luis Contreras, B. Jordan, I. Puljak, Pawel Gliwny, L. V. Larionova, L. Di Venere, Sunay Ibryamov, Abelardo Moralejo, M. I. Martínez, B. De Lotto, Juan Cortina, A. A. Mokrushina, E. Moretti, Kaya Mori, Maria Petropoulou, Elena G. Larionova, J. Rico, Juan Abel Barrio, Narek Sahakyan, A. Fattorini, C. Fruck, F. Del Puppo, F. Verrecchia, Victoria Moreno, Chiara Righi, M. V. Fonseca, Elina Lindfors, Justin D. Finke, D. A. Morozova, V. D'Elia, A. López-Oramas, M. G. Nikolashvili, John Hoang, Susumu Inoue, L. Maraschi, R. Paoletti, R. Reinthal, A. Strigachev, Saverio Lombardi, T. Schweizer, E. Do Souto Espiñeira, Tomislav Terzić, Ferdinando Giordano, Fabrizio Tavecchio, C. Nigro, B. Banerjee, Bernd Schleicher, A. Hahn, R. G. Chanishvili, Francesco Longo, M. Will, Shunsuke Sakurai, Ll. Font, Takeshi Oka, Davide Depaoli, Alan P. Marscher, L. Saha, D. Elsaesser, Antonio Stamerra, R. Carosi, G. Ceribella, Joni Tammi, V. Fallah Ramazani, D. Lelas, T. Guever, M. Teshima, J. M. Paredes, Dorota Sobczyńska, Zeljka Bosnjak, Chakali Eswaraiah, A. C. R. Readhead, G. Busetto, Jorge Otero-Santos, Mislav Baloković, J. L. Richards, R. A. Chigladze, Y. Chai, J. Kushida, Seiya Nozaki, Kari Nilsson, U. Barres de Almeida, L. Foffano, Ciro Bigongiari, Saša Mićanović, V. Vitale, Wen Ping Chen, P. Temnikov, T. Saito, Andrei Berdyugin, David H. Green, D. Strom, F. Di Pierro, E. N. Kopatskaya, Stefano Covino, D. Miceli, S. Gasparyan, D. Blinov, G. Maneva, E. Molina, S. G. Jorstad, T. Surić, M. Mariotti, I. Šnidarić, Satoshi Fukami, H. Kubo, M. Vazquez Acosta, R. López-Coto, Kazuma Ishio, Y. Iwamura, M. Gaug, A. Lamastra, A. C. Sadun, J. Herrera, G. Vanzo, Oscar Blanch, T. S. Grishina, Walter Max-Moerbeck, Anne Lähteenmäki, S. M. Colak, Valeri M. Larionov, C. M. Raiteri, C. Maggio, O. M. Kurtanidze, S. Cikota, D. Ninci, G. Ferrara, A. De Angelis, Rumen Bachev, Yu. V. Troitskaya, M. Minev, Georgi Latev, Elisa Bernardini, Other groups, L. Pavletić, Elisa Prandini, Goran Damljanović, Evgeni Semkov, M. Delfino, Wolfgang Rhode, Yusuke Suda, Massimo Persic, Carlo Vigorito, A. Berti, Paul S. Smith, K. Noda, Dario Hrupec, C. Leto, Victor A. Acciari, K. Nishijima, B. Machado de Oliveira Fraga, Mitsunari Takahashi, P. Peñil, L. Bellizzi, Serena Loporchio, Jose Miguel Miranda, N. Godinović, M. Strzys, Ashot Chilingarian, N. Giglietto, U. Colin, W. Bednarek, Simone Mender, Moritz Hütten, W. Bhattacharyya, I. Agudo, R. Mirzoyan, Louis Antonelli, Dominik Baack, P. Majumdar, G. M. Madejski, A. Arbet Engels, Vitaly Neustroev, J. W. Moody, Luca Tosti, M. Villata, D. Morcuende, N. Torres-Albà, I. Vovk, Jordi Delgado, H. C. Lin, Kevin Schmidt, Talvikki Hovatta, D. Hadasch, M. Palatiello, Y. Kajiwara, Francesco Dazzi, M. Mallamaci, O. Vince, M. Peresano, Yosuke Kobayashi, P. Da Vela, F. D'Ammando, K. Mannheim, R. J. García López, Ivan S. Troitsky, Tjark Miener, David Paneque, A. Biland, Marina Manganaro, P. G. Prada Moroni, Merja Tornikoski, Matteo Cerruti, M. López, Konstancja Satalecka, D. Mazin, Michele Doro, J. Barnes, F. Leone, M. Ribó, J. van Scherpenberg, A. Babić, Alessia Spolon, Léa Jouvin, Manasvita Joshi, Vassil Verguilov, Daniel Kerszberg, V. Ramakrishnan, D. Zarić, Tomohiro Inada, E. Colombo, M. Perri, M. Garczarczyk, Federal Ministry of Education and Research (Germany), Istituto Nazionale di Astrofisica, Swiss National Science Foundation, Istituto Nazionale di Fisica Nucleare, Ministerio de Economía y Competitividad (España), European Commission, Department of Atomic Energy (India), Ministry of Education, Culture, Sports, Science and Technology (Japan), Japan Society for the Promotion of Science, Ministry of Education, Youth and Science (Bulgaria), Academy of Finland, Croatian Science Foundation, University of Rijeka, German Research Foundation, National Centre for Research and Development (Poland), Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Aeronautics and Space Administration (US), Department of Energy (US), Centre National de la Recherche Scientifique (France), Russian Science Foundation, Gordon and Betty Moore Foundation, John Templeton Foundation, Shota Rustaveli National Science Foundation, Comisión Nacional de Investigación Científica y Tecnológica (Chile), Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Magic, Collaboration, Other Groups And, Collaborator, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. A., Baack, D., Babic, A., Banerjee, B., De Almeida, U. B., Barrio, J. A., Gonzalez, J. B., Bednarek, W., Bellizzi, L. K., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Bosnjak, Z., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colin, U., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Vela, P. D., Dazzi, F., Angelis, A. D., Lotto, B. D., Puppo, F. D., Delfino, M., Delgado, J., Depaoli, D., Pierro, F. D., Venere, L. D., Souto Espiñeira, E. D., Prester, D. D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. F., Fattorini, A., Ferrara, G., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Lopez, R. J. G., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Hutten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., Jouvin, L., Kajiwara, Y., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., De Oliveira Fraga, B. M., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Mender, S., Micanovic, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogues, L., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletic, L., Peñil, P., Peresano, M., Persic, M., Moroni, P. G. P., Prandini, E., Puljak, I., Rhode, W., Ribo, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Snidaric, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., Suric, T., Takahashi, M., Tavecchio, F., Temnikov, P., Terzic, T., Teshima, M., Torres-Alba, N., Tosti, L., Scherpenberg, J. V., Vanzo, G., Acosta, M. V., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Zaric, D., Petropoulou, M., Finke, J., D'Ammando, F., Balokovic, M., Madejski, G., Mori, K., Puccetti, S., Leto, C., Perri, M., Verrecchia, F., Villata, M., Raiteri, C. M., Agudo, I., Bachev, R., Berdyugin, A., Blinov, D. A., Chanishvili, R., Chen, W. P., Chigladze, R., Damljanovic, G., Eswaraiah, C., Grishina, T. S., Ibryamov, S., Jordan, B., Jorstad, S. G., Joshi, M., Kopatskaya, E. N., Kurtanidze, O. M., Kurtanidze, S. O., Larionova, E. G., Larionova, L. V., Larionov, V. M., Latev, G., Lin, H. C., Marscher, A. P., Mokrushina, A. A., Morozova, D. A., Nikolashvili, M. G., Semkov, E., Smith, P. S., Strigachev, A., Troitskaya, Y. V., Troitsky, I. S., Vince, O., Barnes, J., Guver, T., Moody, J. W., Sadun, A. C., Hovatta, T., Richards, J. L., Max-Moerbeck, W., Readhead, A. C. S., Lahteenmaki, A., Tornikoski, M., Tammi, J., Ramakrishnan, V., and Reinthal, R.
Subjects: Individual sources Mrk 421, Flux, Astrophysics, Blazar, 7. Clean energy, 01 natural sciences, Imaging Atmospheric Cherenkov observations, Gamma-ray, Active galaxie, Relativistic jet, MAGIC (telescope), BL lacertae objects, BL Lacertae objects, Blazars, Active galaxies, Markarian galaxies, Gamma-ray detectors, Gamma-rays, Relativistic jets, High energy astrophysics, Observational astronomy, 010303 astronomy & astrophysics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Gamma ray, X-ray, Markarian galaxie, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics and Astronomy, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics - High Energy Astrophysical Phenomena, Individual sources Mrk 421, Imaging Atmospheric Cherenkov observations, MAGIC, BL Lacertae objects, Blazars, Active galaxies, Markarian galaxies, Gamma-ray detectors, Gamma-rays, Relativistic jets, High energy astrophysics, Observational astronomy, Plasmoid, Astrophysics::Cosmology and Extragalactic Astrophysics, BL Lacertae object, High energy astrophysic, 0103 physical sciences, Gamma-ray detector, 010308 nuclear & particles physics, Astronomy and Astrophysics, Magnetic reconnection, Light curve, MAGIC, 13. Climate action, Space and Planetary Science, ddc:520, High Energy Astrophysical Phenomena
Abstract: We report on a multiband variability and correlation study of the TeV blazar Mrk 421 during an exceptional flaring activity observed from 2013 April 11 to 19. The study uses, among others, data from GLAST-AGILE Support Program (GASP) of the Whole Earth Blazar Telescope (WEBT), Swift, Nuclear Spectroscopic Telescope Array (NuSTAR), Fermi Large Area Telescope, Very Energetic Radiation Imaging Telescope Array System (VERITAS), and Major Atmospheric Gamma Imaging Cherenkov (MAGIC). The large blazar activity and the 43 hr of simultaneous NuSTAR and MAGIC/VERITAS observations permitted variability studies on 15 minute time bins over three X-ray bands (3-7 keV, 7-30 keV, and 30-80 keV) and three very-high-energy (VHE; >0.1 TeV) gamma-ray bands (0.2-0.4 TeV, 0.4-0.8 TeV, and >0.8 TeV). We detected substantial flux variations on multi-hour and sub-hour timescales in all of the X-ray and VHE gamma-ray bands. The characteristics of the sub-hour flux variations are essentially energy independent, while the multi-hour flux variations can have a strong dependence on the energy of the X-rays and the VHE gamma-rays. The three VHE bands and the three X-ray bands are positively correlated with no time lag, but the strength and characteristics of the correlation change substantially over time and across energy bands. Our findings favor multi-zone scenarios for explaining the achromatic/chromatic variability of the fast/slow components of the light curves, as well as the changes in the flux-flux correlation on day-long timescales. We interpret these results within a magnetic reconnection scenario, where the multi-hour flux variations are dominated by the combined emission from various plasmoids of different sizes and velocities, while the sub-hour flux variations are dominated by the emission from a single small plasmoid moving across the magnetic reconnection layer. © 2020. The American Astronomical Society. All rights reserved., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2017-87859-P, FPA2017-85668-P, FPA2017-82729-C6-2-R, FPA2017-827 29-C6-6-R, FPA2017-82729-C6-5-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2017-87055-C2-2-P, and FPA 201790566REDC), the Indian Department of Atomic Energy, the Japanese JSPS and MEXT, the Bulgarian Ministry of Education and Science, National RI Roadmap Project DO-1153/28.08.2018 and the Academy of Finland grant No. 320045 is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia "Severo Ochoa" SEV-20160588 and SEV-2015-0548, and Unidad de Excelencia "Maria de Maeztu" MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382, and by the Brazilian MCTIC, CNPq and FAPERJ. The Fermi-LAT.Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK), and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K..A..Wallenberg Foundation, the Swedish Research Council, and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This work made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software, and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NuSTARDAS) jointly developed by the ASI Science Data Center (ASDC; Italy) and the California Institute of Technology (USA). D.P. and A.B. are grateful to Amy Furniss and Wystan Benbow for providing the VERITAS VHE gamma-ray fluxes and for useful discussions about them. M.P. acknowledges support from the Lyman Jr. Spitzer Postdoctoral Fellowship and NASA Fermi grant No. 80NSSC18K1745., and J.F. is partially supported by NASA under contract S-15633Y. M.B. acknowledges support from NASA Headquarters under the NASA Earth and Space Science Fellowship Program (grant NNX14AQ07H) and the black hole Initiative at Harvard University, which is funded in part by the Gordon and Betty Moore Foundation (grant GBMF8273) and in part by the John Templeton Foundation. This research was partially supported by the Bulgarian National Science Fund of the Ministry of Education and Science under grants DN 18-13/2017, DN 18-10/2017, KP06-H28/3 (2018), and KP-06-PN38/1 (2019), as well as for the Spanish MIMECO (AYA2016-80889-P, RYC-2013-14511) and the IAA-CSIC "Severo Ochoa" program SEV2017-0709. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. The Abastumani team acknowledges financial support of the project FR/638/6-320/12 by the Shota Rustaveli National Science Foundation under contract 31/77. T.G. acknowledges support from Istanbul University (Project numbers 49429 and 48285), Bilim Akademisi (BAGEP program), and TUBITAK (project numbers 13AT100-431, 13AT100-466, and 13AT60-430). The Boston University effort was supported in part by NASA grants NNX12AO90G and NNX14AQ58G. Data from the Steward Observatory spectropolarimetric monitoring project were used in this paper. This program is supported by Fermi Guest Investigator grants NNX08AW56G, NNX09 AU10G, NNX12AO93G, and NNX15AU81G. The OVRO 40 m monitoring program is supported in part by NASA grants NNX08AW31G and NNX11A043G and NSF grants AST-0808050 and AST-1109911. The Metsahovi team acknowledges the support from the Academy of Finland to our observing projects (numbers 212656, 210338, 121148, and others). W.M. acknowledges support from CONICYT project Basal AFB-170002.
Published: 2020

35. Detection of persistent VHE gamma-ray emission from PKS 1510–089 by the MAGIC telescopes during low states between 2012 and 2017

Author: M. I. Martínez, P. Bangale, Sabrina Einecke, Jae-Young Kim, M. Makariev, Aaron Dominguez, Alicia Fattorini, G. Pedaletti, Ivica Puljak, Stefano Covino, B. De Lotto, Pierre Colin, J. Kushida, Jose Luis Contreras, Walter Max-Moerbeck, J. Becerra González, A. Arbet Engels, A. De Angelis, Vitaly Neustroev, M. Peresano, Chiara Righi, Juan Abel Barrio, D. Elsaesser, J. Palacio, Satoshi Masuda, J. E. Ward, Juan Cortina, Takashi Saito, Wrijupan Bhattacharyya, P. Temnikov, Sidika Merve Colak, Wolfgang Rhode, Giovanni Ceribella, I. Agudo, José L. Gómez, V. A. Acciari, Antonio Stamerra, D. Hadasch, D. Fidalgo, Camilla Maggio, Abelardo Moralejo, A. López-Oramas, P. Munar-Adrover, E. Moretti, Daniela Dorner, Pablo Peñil, Alexander Hahn, Dominik Baack, Gaia Vanzo, G. Maneva, E. Do Souto Espiñera, Joni Tammi, Adrian Biland, Elina Lindfors, Jürgen Besenrieder, C. M. Raiteri, Louis Antonelli, Sol N. Molina, Daniel Mazin, Ievgen Vovk, A. Berti, Francesco Dazzi, A. Fernández-Barral, K. Nishijima, Manuel Delfino, M. Gaug, R. J. García López, Nikola Godinovic, D. Dominis Prester, J. Rico, V. Ramakrishnan, Francesco Longo, Pratik Majumdar, D. Zarić, M. V. Fonseca, J. Herrera, T. Schweizer, Antonio Fuentes, Sebastian Kiehlmann, Marc Ribó, Ana Babić, A. Somero, Koji Noda, L. Maraschi, E. Prandini, Elisa Bernardini, P. Giammaria, V. Fallah Ramazani, John Hoang, Massimo Persic, Stefano Ansoldi, S. Paiano, Efthalia Traianou, Riccardo Paoletti, Tomislav Terzić, Ciro Bigongiari, Clemens Thum, B. Banerjee, P. G. Prada Moroni, Hidetoshi Kubo, C. Arcaro, J. van Scherpenberg, Karl Mannheim, I. Snidaric, Oscar Blanch, D. Kuveždić, Razmik Mirzoyan, U. Barres de Almeida, F. Leone, Carolina Casadio, Kari Nilsson, Damir Lelas, Anne Lähteenmäki, Masahiro Teshima, Stefan Cikota, M. Strzys, M. Will, Markus Garczarczyk, Dorota Sobczyńska, D. Ninci, M. Vazquez Acosta, Angela Sandrinelli, Cosimo Nigro, M. Nievas Rosillo, G. Ferrara, M. Minev, Victoria Moreno, G. Bonnoli, Kazuma Ishio, Yuki Iwamura, Susumu Inoue, Tarek M. Hassan, W. Bednarek, Fabrizio Tavecchio, Dario Hrupec, Luca Foffano, Ll. Font, L. Nogués, M. A. Lopez, Rodolfo Carosi, Mosè Mariotti, J. M. Paredes, J. R. Garcia, V. D'Elia, Saverio Lombardi, A. Rugliancich, Marina Manganaro, Ioannis Myserlis, D. Galindo, Merja Tornikoski, E. Molina, E. Colombo, Konstancja Satalecka, Michele Doro, Lab Saha, A. Niedzwiecki, David Paneque, D. Guberman, Jordi Delgado, F. Di Pierro, Talvikki Hovatta, P. Da Vela, Julian Sitarek, C. Fruck, N. Torres-Albà, Stefano Gallozzi, Jose Miguel Miranda, Alessandra Lamastra, T. Surić, Shimpei Tsujimoto, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Cikota, S., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., DI Pierro, F., Do Souto Espiñera, E., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuveždić, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., López-Oramas, A., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Munar-Adrover, P., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Becerra González, J., Raiteri, C. M., Sandrinelli, A., Hovatta, T., Kiehlmann, S., Max-Moerbeck, W., Tornikoski, M., Lähteenmäki, A., Tammi, J., Ramakrishnan, V., Thum, C., Agudo, I., Molina, S. N., Gómez, J. L., Fuentes, A., Casadio, C., Traianou, E., Myserlis, I., Kim, J. -Y., Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Universitat de Barcelona, Federal Ministry of Education and Research (Germany), Max Planck Society, Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, and Junta de Andalucía
Subjects: galaxies [Gamma rays], Astrophysics, 01 natural sciences, 7. Clean energy, jet [Galaxies], law.invention, Raigs gamma, law, Jets (Astrofísica), Broadband, 010303 astronomy & astrophysics, Physics, galaxies: active, galaxies: jets, gamma rays: galaxies, quasars: individual: PKS 1510-089, galaxie [Gamma rays], Gamma ray, Galaxies: active, 3. Good health, Magnetic field, Gamma rays: galaxies, Spectral energy distribution, Física nuclear, Galaxies: jets, Quasars: individual: PKS 1510-089, Astronomy and Astrophysics, Space and Planetary Science, Flare, Spectral shape analysis, active [Galaxies], astro-ph.GA, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 0103 physical sciences, individual: PKS 1510-089 [Quasars], Quasars, Quàsars, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Gamma rays, Quasar, Plasma, Astronomy and Astrophysic, Astrophysics - Astrophysics of Galaxies, Astrophysical jets, Astrophysics of Galaxies (astro-ph.GA), Galàxies actives, Active galaxies, ddc:520, jets [Galaxies]
Abstract: PKS 1510-089 is a flat spectrum radio quasar strongly variable in the optical and GeV range. To date, very high-energy (VHE, > 100 GeV) emission has been observed from this source either during long high states of optical and GeV activity or during short flares. Aims. We search for low-state VHE gamma-ray emission from PKS 1510-089. We characterize and model the source in a broadband context, which would provide a baseline over which high states and flares could be better understood. Methods. PKS 1510-089 has been monitored by the MAGIC telescopes since 2012. We use daily binned Fermi-LAT flux measurements of PKS 1510-089 to characterize the GeV emission and select the observation periods of MAGIC during low state of activity. For the selected times we compute the average radio, IR, optical, UV, X-ray, and gamma-ray emission to construct a low-state spectral energy distribution of the source. The broadband emission is modeled within an external Compton scenario with a stationary emission region through which plasma and magnetic fields are flowing. We also perform the emission-model-independent calculations of the maximum absorption in the broad line region (BLR) using two different models. Results. The MAGIC telescopes collected 75 hr of data during times when the Fermi-LAT flux measured above 1 GeV was below 3? × 10 -8 ? cm -2 ? s -1 , which is the threshold adopted for the definition of a low gamma-ray activity state. The data show a strongly significant (9.5¿) VHE gamma-ray emission at the level of (4.27 ± 0.61 stat ) × 10 -12 ? cm -2 ? s -1 above 150 GeV, a factor of 80 lower than the highest flare observed so far from this object. Despite the lower flux, the spectral shape is consistent with earlier detections in the VHE band. The broadband emission is compatible with the external Compton scenario assuming a large emission region located beyond the BLR. For the first time the gamma-ray data allow us to place a limit on the location of the emission region during a low gamma-ray state of a FSRQ. For the used model of the BLR, the 95% confidence level on the location of the emission region allows us to place it at a distance > 74% of the outer radius of the BLR. © ESO 2018., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Exce-lencia “Severo Ochoa” SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382, and by the Brazilian MCTIC, CNPq and FAPERJ. IA acknowledges support from a Ramón y Cajal grant of the Ministerio de Economía, Industria, y Competitividad (MINECO) of Spain. Acquisition and reduction of the POLAMI and MAPCAT data was supported in part by MINECO through grants AYA2010-14844, AYA2013-40825-P, and AYA2016-80889-P, and by the Regional Government of Andalucía through grant P09-FQM-4784.
Published: 2018

36. Multi-wavelength characterization of the blazar S5 0716+714 during an unprecedented outburst phase

Author: Mark Gurwell, Max Ludwig Ahnen, Elina Lindfors, D. Gasparrini, Antonio Stamerra, Daniel Mazin, J. Becerra González, Alessandro Carosi, B. De Lotto, Francesco Longo, A. Berti, Ievgen Vovk, G. A. Borman, Rodrigo Reeves, Abelardo Moralejo, M. Peresano, N. Torres-Albà, P. Giammaria, Helen Jermak, V. Fallah Ramazani, Juan Abel Barrio, G. Pedaletti, Adrian Biland, G. Bonnoli, M. Minev, I. Reichardt, T. Schweizer, D. Bastieri, I. Snidaric, Takashi Saito, I. Agudo, Stefano Gallozzi, Jose Miguel Miranda, Satoshi Masuda, R. J. García López, Alexander Hahn, Stefano Covino, Dario Hrupec, J. Kushida, J. Rico, J. Anton Zensus, Arka Chatterjee, Alan P. Marscher, Mosè Mariotti, M. A. Lopez, Dominik Baack, Yu. V. Troitskaya, Mitsunari Takahashi, A. C. S. Readhead, J. E. Ward, K. Mielke, D. Galindo, Aaron Dominguez, Jose Luis Contreras, Svetlana G. Jorstad, J. R. Garcia, D. Fidalgo, Massimo Persic, Pratik Majumdar, M. V. Fonseca, L. Maraschi, D. Kuveždić, K. Nishijima, D. Dominis Prester, J. M. Paredes, Sidika Merve Colak, E. N. Kopatskaya, D. J. Thompson, Juan Cortina, P. G. Prada Moroni, Giovanni Ceribella, Julian Sitarek, Stefano Ansoldi, Oscar Blanch, T. S. Grishina, Emmanouil Angelakis, Wrijupan Bhattacharyya, C. Fruck, Tomislav Terzić, Riccardo Paoletti, Chiara Righi, B. Lott, Jordi Delgado, A. Niedzwiecki, G. M. Madejski, D. Hadasch, F. Di Pierro, Saverio Lombardi, A. De Angelis, M. Strzys, Talvikki Hovatta, M. Vazquez Acosta, A. Treves, Vitaly Neustroev, L. V. Larionova, Ivan S. Troitsky, David Paneque, Yusuke Konno, L. Nogués, P. Temnikov, Andrea Rugliancich, Tarek M. Hassan, Krzysztof Nalewajko, W. Bednarek, Thomas P. Krichbaum, Sergey S. Savchenko, Victoria Moreno, Francesco Dazzi, A. Fernández-Barral, Ryosuke Itoh, P. Da Vela, Alexander Kraus, E. Moretti, Louis Antonelli, Fabrizio Tavecchio, Ll. Font, Bindu Rani, T. J. Pearson, Valeri M. Larionov, T. Nagayoshi, G. Maneva, D. Guberman, Manuel Delfino, Camilla Maggio, Daniela Dorner, Dariusz Gora, Gaia Vanzo, M. Gaug, S. Paiano, T. Surić, J. Herrera, Marina Manganaro, Shimpei Tsujimoto, Koji Noda, Ana Babić, Elisa Bernardini, Emilia Järvelä, Carolina Casadio, Anne Lähteenmäki, Masahiro Teshima, Karl Mannheim, Kari Nilsson, M. Will, Nikola Godinovic, Ioannis Myserlis, Merja Tornikoski, E. Colombo, Markus Garczarczyk, N. P. M. Kuin, L. O. Takalo, P. Cumani, Kazuma Ishio, Konstancja Satalecka, Michele Doro, Cosimo Nigro, M. Nievas Rosillo, Rodolfo Carosi, J. Palacio, V. Ramakrishnan, M. I. Martínez, P. Bangale, Sabrina Einecke, M. Makariev, E. Prandini, Iain A. Steele, Razmik Mirzoyan, U. Barres de Almeida, Damir Lelas, A. A. Vasilyev, Dorota Sobczyńska, Ivica Puljak, Pierre Colin, Sol N. Molina, D. A. Morozova, D. Ninci, A. Y. Lien, J. Hose, D. Elsaesser, Walter Max-Moerbeck, R. Ch. Berse, M. Hayashida, D. Zarić, Wolfgang Rhode, Marc Ribó, Hidetoshi Kubo, B. Banerjee, C. Arcaro, Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), MAGIC, MWL, Fermi-LAT, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Ch Berse, R., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Gallozzi, S., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Treves, A., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Bastieri, D., Gasparrini, D., Lott, B., Rani, B., Thompson, D. J., Agudo, I., Angelakis, E., Borman, G. A., Casadio, C., Grishina, T. S., Gurwell, M., Hovatta, T., Itoh, R., Järvelä, E., Jermak, H., Jorstad, S., Kopatskaya, E. N., Kraus, A., Krichbaum, T. P., Kuin, N. P. M., Lähteenmäki, A., Larionov, V. M., Larionova, L. V., Lien, A. Y., Madejski, G., Marscher, A., Myserlis, I., Max-Moerbeck, W., Molina, S. N., Morozova, D. A., Nalewajko, K., Pearson, T. J., Ramakrishnan, V., Readhead, A. C. S., Reeves, R. A., Savchenko, S. S., Steele, I. A., Tornikoski, M., Troitskaya, Yu. V., Troitsky, I., Vasilyev, A. A., Anton Zensus, J., Japanese Government, Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, Istituto Nazionale di Astrofisica, Federal Ministry of Education and Research (Germany), Croatian Science Foundation, Polish Academy of Sciences, Centre National de la Recherche Scientifique (France), Ministério da Ciência e Tecnologia (Brasil), National Aeronautics and Space Administration (US), Academy of Finland, Smithsonian Institution, Academia Sinica (Taiwan), Russian Science Foundation, Junta de Andalucía, Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: BL Lacertae objects: individual: S5 0716+714, galaxies: active, galaxies: jets, gamma rays: galaxies, galaxies [Gamma rays], active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxies: active, Galaxies: jets, Gamma rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, 7. Clean energy, 01 natural sciences, jet [Galaxies], Radio spectrum, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, QB, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Superluminal motion, galaxie [Gamma rays], 010308 nuclear & particles physics, Spectral density, Astronomy and Astrophysic, Light curve, Redshift, ddc:520, jets [Galaxies], Física nuclear, individual: S5 0716+714 [BL Lacertae objects], gamma-rays: galaxies, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], BL Lac object, Fermi Gamma-ray Space Telescope
Abstract: Context. The BL Lac object S5 0716+714, a highly variable blazar, underwent an impressive outburst in January 2015 (Phase A), followed by minor activity in February (Phase B). The MAGIC observations were triggered by the optical flux observed in Phase A, corresponding to the brightest ever reported state of the source in the R-band. Aims.The comprehensive dataset collected is investigated in order to shed light on the mechanism of the broadband emission. Methods. Multi-wavelength light curves have been studied together with the broadband spectral energy distributions (SEDs). The sample includes data from Effelsberg, OVRO, Metsähovi, VLBI, CARMA, IRAM, SMA, Swift-UVOT, KVA, Tuorla, Steward, RINGO3, KANATA, AZT-8+ST7, Perkins, LX-200, Swift-XRT, NuSTAR, Fermi-LAT and MAGIC. Results. The flaring state of Phase A was detected in all the energy bands, providing for the first time a multi-wavelength sample of simultaneous data from the radio band to the very-high-energy (VHE, E > 100 GeV). In the constructed SED, the Swift-XRT+NuSTAR data constrain the transition between the synchrotron and inverse Compton components very accurately, while the second peak is constrained from 0.1 GeV to 600 GeV by Fermi+MAGIC data. The broadband SED cannot be described with a one-zone synchrotron self-Compton model as it severely underestimates the optical flux in order to reproduce the X-ray to -ray data. Instead we use a two-zone model. The electric vector position angle (EVPA) shows an unprecedented fast rotation. An estimation of the redshift of the source by combined high-energy (HE, 0.1 GeV < E < 100 GeV) and VHE data provides a value of z = 0:31 ± 0:02 ± 0:05, confirming the literature value. Conclusions. The data show the VHE emission originating in the entrance and exit of a superluminal knot in and out of a recollimation shock in the inner jet. A shock-shock interaction in the jet seems responsible for the observed flares and EVPA swing. This scenario is also consistent with the SED modeling. © ESO 2018., We would like to thank the Instituto de Astrofisica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia "Severo Ochoa" SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia "Maria de Maeztu" MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq and FAPERJ. The Fermi-LAT Collaboration acknowledges generous ongoing support from a number of agencies and institutes that have supported both the development and the operation of the LAT as well as scientific data analysis. These include the National Aeronautics and Space Administration and the Department of Energy in the United States, the Commissariat a l'Energie Atomique and the Centre National de la Recherche Scientifique/Institut National de Physique Nucleaire et de Physique des Particules in France, the Agenzia Spaziale Italiana and the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of Education, Culture, Sports, Science and Technology (MEXT), High Energy Accelerator Research Organization (KEK) and Japan Aerospace Exploration Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish Research Council and the Swedish National Space Board in Sweden. Additional support for science analysis during the operations phase is gratefully acknowledged from the Istituto Nazionale di Astrofisica in Italy and the Centre National d'Etudes Spatiales in France. This research was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by Universities Space Research Association through a contract with NASA. We thank the Swift team duty scientists and science planners., The Metsahovi team acknowledges the support from the Academy of Finland to our observing projects (numbers 212656, 210338, 121148, and others). The VLBA is an instrument of the Long Baseline Observatory. The Long Baseline Observatory is a facility of the National Science Foundation operated by Associated Universities, Inc. The Sub-millimeter Array is a joint project between the Smithsonian Astrophysical Observatory and the Academia Sinica Institute of Astronomy and Astrophysics and is funded by the Smithsonian Institution and the Academia Sinica. The OVRO 40-m monitoring program is supported in part by NASA grants NNX08AW31G, NNX11A043G and NNX14AQ89G, and NSF grants AST-0808050 and AST-1109911. The St. Petersburg University team acknowledges support from Russian Science Foundation grant 17-12-01029. The BU group acknowledges support by NASA under Fermi Guest Investigator grant NNX14AQ58G and by NSF under grant AST-1615796. Part of this work was done with funding by the UK Space Agency. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The PRISM (Perkins Re-Imaging SysteM) camera at Lowell Observatory was developed by K. Janes et al. at BU and Lowell Observatory, with funding from the NSF, BU, and Lowell Observatory. This paper makes use of data obtained with the 100m Effelsberg radio-telescope, which is operated by the Max-Planck-Institut fur Radioastronomy (MPIfR) in Bonn (Germany). Part of this work is based on archival data, software or online services provided by the ASI Science Data Center (ASDC). PYRAF is a product of the Space Telescope Science Institute, which is operated by AURA for NASA. This paper is partly based on observations carried out with the IRAM 30 m. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain). IA acknowledges support by a Ramon y Cajal grant of the Ministerio de Economia, Industria y Competitividad (MINECO) of Spain. The research at the IAA-CSIC was supported in part by the MINECO through grants AYA2016-80889-P, AYA2013-40825-P, and AYA2010-14844, and by the regional government of Andalucia through grant P09-FQM-4784. The Liverpool Telescope is operated by JMU with financial support from the UK-STFC.
Published: 2018

37. Limits on the flux of tau neutrinos from 1 PeV to 3 EeV with the MAGIC telescopes

Author: Christian Fruck, L. Nogués, E. Moretti, Francesco Longo, Alba Fernández-Barral, Kazuma Ishio, Satoshi Masuda, Arka Chatterjee, D. Fidalgo, Yusuke Konno, M. Garczarczyk, L. Maraschi, Elina Lindfors, Ievgen Vovk, Ivica Puljak, Pierre Colin, J. R. Garcia, Daniel Mazin, A. Berti, M. I. Martínez, Rodolfo Carosi, Mosè Mariotti, Louis Antonelli, T. Schweizer, K. Mielke, Alessandro Carosi, B. De Lotto, Aaron Dominguez, Cosimo Nigro, M. Nievas Rosillo, T. Nagayoshi, Martin Makariev, N. Torres-Albà, M. Minev, Sabrina Einecke, Pratik Majumdar, M. V. Fonseca, Nikola Godinovic, J. E. Ward, J. Becerra González, Stefano Ansoldi, Riccardo Paoletti, Jose Miguel Miranda, Saverio Lombardi, Andrea Rugliancich, Abelardo Moralejo, Sidika Merve Colak, Stefano Covino, Tomislav Terzić, Oscar Blanch, P. G. Prada Moroni, G. Pedaletti, E. Colombo, Marcel Strzys, Masahiro Teshima, Wrijupan Bhattacharyya, J. Palacio, Julian Sitarek, J. Hose, K. Nishijima, Daniela Hadasch, R. Mirzoyan, Adrian Biland, Martin Will, J. M. Paredes, U. Barres de Almeida, I. Reichardt, L. O. Takalo, Antonio Stamerra, Tomoki Saito, Giovanni Ceribella, D. Elsaesser, R. Ch. Berse, Damir Lelas, M. Peresano, Marina Manganaro, D. Galindo, Shimpei Tsujimoto, Dominik Baack, Tihomir Surić, J. Rico, Dorota Sobczyńska, Wolfgang Rhode, S. Paiano, Chiara Righi, P. Cumani, Konstancja Satalecka, Michele Doro, Karl Mannheim, P. Temnikov, Dario Hrupec, Francesco Dazzi, M. Vazquez Acosta, Juan Abel Barrio, M. A. Lopez, Mitsunari Takahashi, Victoria Moreno, A. Niedzwiecki, R. J. García López, David Paneque, B. Banerjee, C. Arcaro, D. Guberman, E. Prandini, A. De Angelis, A. Treves, Vitaly Neustroev, Massimo Persic, D. Kuveždić, Jordi Delgado, G. Bonnoli, F. Di Pierro, Manuel Delfino, Camilla Maggio, Daniela Dorner, Dariusz Gora, Gaia Vanzo, M. Gaug, J. Herrera, G. Maneva, Koji Noda, Elisa Bernardini, P. Da Vela, Ana Babić, Kari Nilsson, J. Kushida, Jose Luis Contreras, Juan Cortina, Tarek M. Hassan, W. Bednarek, Fabrizio Tavecchio, Ll. Font, Max Ludwig Ahnen, P. Giammaria, I. Snidaric, M. Hayashida, D. Zarić, Marc Ribó, P. Bangale, Hidetoshi Kubo, D. Ninci, Alexander Hahn, D. Dominis Prester, V. Fallah Ramazani, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berse, R. Ch., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Vela, P. Da, Dazzi, F., Angelis, A. De, Lotto, B. De, Delfino, M., Delgado, J., Pierro, F. Di, Domínguez, A., Prester, D. Domini, Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Góra, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Treves, A., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., and Zarić, D.
Subjects: Point source, Astrophysics::High Energy Astrophysical Phenomena, Tau neutrinos, FOS: Physical sciences, Astrophysics, Cherenkov telescopes, 01 natural sciences, law.invention, law, Tau neutrino, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Gamma-ray astronomy, tau neutrinos, Spectral index, ta115, 010308 nuclear & particles physics, Horizon, High Energy Physics::Phenomenology, Astronomy and Astrophysics, Cherenkov telescope, ddc:540, High Energy Physics::Experiment, Neutrino, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Lepton, Flare
Abstract: Astroparticle physics 102, 77 - 88 (2018). doi:10.1016/j.astropartphys.2018.05.002, A search for tau neutrino induced showers with the MAGIC telescopes is presented. The MAGIC telescopes located at an altitude of 2200 m a.s.l. in the Canary Island of La Palma, can point towards the horizon or a few degrees below across an azimuthal range of about 80°. This provides a possibility to search for air showers induced by tau leptons arising from interactions of tau neutrinos in the Earth crust or the surrounding ocean. In this paper we show how such air showers can be discriminated from the background of very inclined hadronic showers by using Monte Carlo simulations. Taking into account the orography of the site, the point source acceptance and the event rates expected have been calculated for a sample of generic neutrino fluxes from photo-hadronic interactions in AGNs. The analysis of about 30 h of data taken towards the sea leads to a 90% C.L. point source limit for tau neutrinos in the energy range from 1.0 × 10$^{15}$ eV to 3.0 × 10$^{18}$ eV of about $E^{2}_{\nu_{\tau}} \times \phi (E_{\nu_{\tau}}) < 2.0 \times 10^{-4}$ GeV cm$^{-2} s^{-1}$ for an assumed power-law neutrino spectrum with spectral index $\gamma =−2$. However, with 300 h and in case of an optimistic neutrino flare model, limits of the level down to $E^{2}_{\nu_{\tau}} \times \phi (E_{\nu_{\tau}}) < 8.4 \times 10^{-6}$ GeV cm$^{-2} s^{-1}$ can be expected., Published by Elsevier Science, Amsterdam [u.a.]
Published: 2018

38. The broad-band properties of the intermediate synchrotron peaked BL Lac S2 0109+22 from radio to VHE gamma rays

Author: F. Wierda, M. Peresano, Cosimo Nigro, Alexander Hahn, M. Nievas Rosillo, R. Reinthal, M. Hayashida, M. Minev, N. Mankuzhiyil, Julian Sitarek, Razmik Mirzoyan, U. Barres de Almeida, Nikola Godinovic, Damir Lelas, J. M. Paredes, Tomislav Terzić, Marc Ribó, Kazuma Ishio, Antonio Stamerra, Ievgen Vovk, Dorota Sobczyńska, M. Delfino, Wrijupan Bhattacharyya, Juan Abel Barrio, P. Bangale, Francesco Longo, D. Dominis Prester, Hidetoshi Kubo, B. De Lotto, J. E. Ward, Rodolfo Carosi, Camilla Maggio, Jenni Jormanainen, S. Paiano, M. Lopez, Karl Mannheim, P. G. Prada Moroni, Marcel Strzys, Ivica Puljak, John Hoang, Stefano Ciprini, Pierre Colin, Daniela Dorner, Gaia Vanzo, Dominik Baack, R. Desiante, Jordi Delgado, T. Schweizer, Fallah Ramazani, F. Di Pierro, M. Gaug, G. Ferrara, Anthony C. S. Readhead, D. Elsaesser, J. Becerra González, J. Herrera, G. Bonnoli, M. Vazquez Acosta, Talvikki Hovatta, Neustroev, L. Nogués, R. J. García López, Martin Makariev, Koji Noda, Elisa Bernardini, L. Maraschi, A. Niedzwiecki, Francesco Dazzi, A. Fernández-Barral, Elina Lindfors, K. Pfrang, Oscar Blanch, E. Moretti, Dario Hrupec, P. Da Vela, Pratik Majumdar, M. V. Fonseca, Darko Zarić, Aaron Dominguez, Daniel Mazin, A. Berti, Ciro Bigongiari, J. Palacio, Massimo Persic, F. Leone, Anne Lähteenmäki, Stefano Ansoldi, S Barcewicz, M. Garczarczyk, David Paneque, Masahiro Teshima, Martin Will, Riccardo Paoletti, Stefano Covino, Walter Max-Moerbeck, R. Ch. Berse, Sidika Merve Colak, Yuki Iwamura, Kyoshi Nishijima, D. Ninci, Abelardo Moralejo, J. R. Garcia, Susumu Inoue, D. Guberman, E. Prandini, Louis Antonelli, R. J. C. Vera, Alessandra Lamastra, M. I. Martínez, Tomoki Saito, Giovanni Ceribella, Marina Manganaro, Merja Tornikoski, Joni Tammi, Sabrina Einecke, P. Cumani, Chiara Righi, Konstancja Satalecka, Wolfgang Rhode, Michele Doro, P. Temnikov, K. Mielke, Iva Šnidarić, Sebastian Kiehlmann, B. Banerjee, Alicia Fattorini, C. Arcaro, Pablo Peñil, Shimpei Tsujimoto, Jürgen Besenrieder, Adrian Biland, Moreno, Tihomir Surić, J. Rico, Satoshi Masuda, Arka Chatterjee, P. Giammaria, D. Fidalgo, N. Torres-Albà, Tarek M. Hassan, G. Pedaletti, Yusuke Konno, W. Bednarek, Fabrizio Tavecchio, Ll. Font, A. De Angelis, Stefano Gallozzi, Jose Miguel Miranda, G. Maneva, Ana Babić, J. Kushida, Jose Luis Contreras, Juan Cortina, Kari Nilsson, E. Colombo, Lab Saha, Luca Foffano, L. O. Takalo, D. Hadasch, Mosè Mariotti, Saverio Lombardi, Andrea Rugliancich, D’Elia, Christian Fruck, Department of Electronics and Nanoengineering, Metsähovi Radio Observatory, Aalto-yliopisto, Aalto University, Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., de Almeida, U. Barre, Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berse, R. Ch., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Prester, D. Domini, Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Ramazani, V. Fallah, Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Gallozzi, S., García Łópez, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Konno, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., Łópez, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Pfrang, K., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Ciprini, S., Desiante, R., Barcewicz, S., Hovatta, T., Jormanainen, J., Takalo, L., Reinthal, R., Mankuzhiyil, N., Wierda, F., Lähteenmäki, A., Tammi, J., Tornikoski, M., Vera, R. J. C., Kiehlmann, S., Max-Moerbeck, W., Readhead, A. C. S., Ciprini , S., and Desiante , R.
Subjects: galaxie [Gamma-rays], active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, jet [Galaxies], Luminosity, 0103 physical sciences, BL Lacertae objects: individual: S2 0109+22, Galaxies: active, Galaxies: jets, Gamma-rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, MAGIC (telescope), Blazar, education, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, education.field_of_study, ta115, 010308 nuclear & particles physics, galaxies: active, galaxies: jets, gamma-rays: galaxies, Optical polarization, individual: S2 0109+22 [BL Lacertae objects], Astronomy and Astrophysic, Redshift, 13. Climate action, ddc:520, Spectral energy distribution, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, BL Lac object
Abstract: The MAGIC telescopes observed S2 0109+22 in 2015 July during its flaring activity in high energy gamma rays observed by Fermi-LAT. We analyse the MAGIC data to characterise the very high energy (VHE) gamma-ray emission of S2 0109+22, which belongs to the subclass of intermediate synchrotron peak (ISP) BL Lac objects. We study the multi-frequency emission in order to investigate the source classification. Finally, we compare the source long-term behaviour to other VHE gamma-ray emitting (TeV) blazars. We performed a temporal and spectral analysis of the data centred around the MAGIC interval of observation (MJD 57225-57231). Long-term radio and optical data have also been investigated using the discrete correlation function. The redshift of the source is estimated through optical host-galaxy imaging and also using the amount of VHE gamma-ray absorption. The quasi-simultaneous multi-frequency spectral energy distribution (SED) is modelled with the conventional one-zone synchrotron self-Compton (SSC) model. MAGIC observations resulted in the detection of the source at a significance level of $5.3\,\sigma$. The VHE gamma-ray emission of S2 0109+22 is variable on a daily time scale. VHE gamma-ray luminosity of the source is lower than the average of TeV BL Lacs. The optical polarization, and long-term optical/radio behaviour of the source are different from the general population of TeV blazars. All these findings agree with the classification of the source as an ISP BL Lac object. We estimate the source redshift as $z = 0.36 \pm 0.07$. The SSC parameters describing the SED are rather typical for blazars., Comment: 15 pages, 10 figures, Corresponding authors: Fallah Ramazani, V. (vafara@utu.fi), Hovatta, T. (talvikki.hovatta@utu.fi), Lindfors, E. (elilin@utu.fi) and Nilsson, K. (kani@utu.fi)
Published: 2018
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39. Constraining very-high-energy and optical emission from FRB 121102 with the MAGIC telescopes

Author: D. Elsaesser, Satoshi Masuda, Alessandra Lamastra, A. Hahn, Stefano Covino, K. Nishijima, Francesco Longo, Kazumi Kashiyama, Arka Chatterjee, Marc Ribó, Pierre Colin, D. Hadasch, J. Becerra González, Oscar Blanch, Julian Sitarek, P. Bangale, Abelardo Moralejo, Hidetoshi Kubo, W. Bhattacharyya, W. Rhode, J. Kushida, Jose Luis Contreras, J. Rico, P. Giammaria, Laura Spitler, F. Leone, M. Minev, L. Maraschi, E. Colombo, Juan Cortina, I. Puljak, Masahiro Teshima, G. Ferrara, Jordi Delgado, M. Vazquez Acosta, M. López, G. Bonnoli, J. Palacio, T. Schweizer, E. Molina, Victoria Moreno, Chiara Righi, J. M. Paredes, Antonio Stamerra, M. Delfino, Francesco Dazzi, A. Fernández-Barral, Jason W. T. Hessels, N. Torres-Albà, B. Banerjee, C. Arcaro, J. R. Garcia, Darko Zarić, P. Da Vela, Iva Šnidarić, D. Baack, D. Ninci, Jürgen Besenrieder, Alicia Fattorini, D. Dominis Prester, F. Di Pierro, M. Peresano, M. Makariev, A. Arbet Engels, Vitaly Neustroev, Lab Saha, Luca Foffano, Pablo Peñil, R. J. García López, Stefano Gallozzi, Jose Miguel Miranda, A. Somero, V. D'Elia, Aaron Dominguez, A. Niedzwiecki, J. E. Ward, C. Fruck, Ciro Bigongiari, Kari Nilsson, P. Majumdar, C. Nigro, G. Ceribella, Elina Lindfors, Juan Abel Barrio, L. Nogués, D. Dorner, M. Nievas Rosillo, M. Mariotti, S. M. Colak, M. Garczarczyk, D. Guberman, Kohta Murase, A. Rugliancich, Marina Manganaro, V. Fallah Ramazani, C. Maggio, G. Maneva, Daniel Mazin, Tomislav Terzić, Dario Hrupec, R. Paoletti, A. Berti, M. Will, A. López-Oramas, D. Paneque, N. Godinović, B. De Lotto, K. Mannheim, Tarek M. Hassan, W. Bednarek, Andrew Seymour, G. Pedaletti, Shimpei Tsujimoto, P. Cumani, Konstancja Satalecka, Michele Doro, Fabrizio Tavecchio, M. I. Martínez, Massimo Persic, V. A. Acciari, Ll. Font, Razmik Mirzoyan, P G Prada Moroni, Adrian Biland, Louis Antonelli, D. Lelas, G. Vanzo, E. Moretti, Ana Babić, Sabrina Einecke, A. De Angelis, Tihomir Surić, S. Paiano, K. Ishio, Dorota Sobczyńska, Benito Marcote, Stefano Ansoldi, D. Fidalgo, Markus Gaug, M. V. Fonseca, Saverio Lombardi, John Hoang, Takashi Saito, U. Barres de Almeida, Elisa Prandini, Rodolfo Carosi, Susumu Inoue, Daniele Michilli, Y. Iwamura, M. Strzys, D. Kuveždić, I. Vovk, Valentí Bosch-Ramon, Jose Carlos Herrera, Petar Temnikov, Koji Noda, Elisa Bernardini, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., de Almeida, U. Barre, Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Prester, D. Domini, Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Ramazani, V. Fallah, Fattorini, A., Fernández-Barral, A., Ferrara, G., Fidalgo, D., Foffano, L., Fonseca, M. V., Font, L., Fruck, C., Gallozzi, S., López, R. J. García, Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Herrera, J., Hoang, J., Hrupec, D., Inoue, S., Ishio, K., Iwamura, Y., Kubo, H., Kushida, J., Kuveždić, D., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., López, M., López-Oramas, A., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nieva, Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peñil, P., Peresano, M., Persic, M., Moroni, P. G. Prada, Prandini, E., Puljak, I., Garcia, J. R., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Somero, A., Stamerra, A., Strzys, M., Surić, T., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Tsujimoto, S., Vanzo, G., Acosta, M. Vazquez, Vovk, I., Ward, J. E., Will, M., Zarić, D., Marcote, B., Spitler, L. G., Hessels, J. W. T., Kashiyama, K., Murase, K., Bosch-Ramon, V., Michilli, D., Seymour, A., Universitat de Barcelona, and ITA
Subjects: High energy, Photon, Radiation mechanisms: non-thermal, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Radiació, Raigs gamma, radiation mechanisms: non-thermal, methods: data analysis, methods: observational, gamma-rays: general, Methods: observational, Methods: data analysis, 0103 physical sciences, Gamma ray astronomy, Astronomia de raigs gamma, observational [Methods], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Millisecond, general [Gamma-rays], ta115, Radiation, non-thermal [Radiation mechanisms], 010308 nuclear & particles physics, Gamma rays, Gamma ray, Astronomy and Astrophysics, Astronomy and Astrophysic, Galaxy, Redshift, data analysi [Methods], Wavelength, 13. Climate action, Space and Planetary Science, Gamma-rays: general, ddc:520, Física nuclear, Optical emission spectroscopy, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Fast radio bursts (FRBs) are bright flashes observed typically at GHz frequencies with millisecond duration, whose origin is likely extragalactic. Their nature remains mysterious, motivating searches for counterparts at other wavelengths. FRB 121102 is so far the only source known to repeatedly emit FRBs and is associated with a host galaxy at redshift $z \simeq 0.193$. We conducted simultaneous observations of FRB 121102 with the Arecibo and MAGIC telescopes during several epochs in 2016--2017. This allowed searches for millisecond-timescale burst emission in very-high-energy (VHE) gamma rays as well as the optical band. While a total of five FRBs were detected during these observations, no VHE emission was detected, neither of a persistent nature nor burst-like associated with the FRBs. The average integral flux upper limits above 100 GeV at 95% confidence level are $6.6 \times 10^{-12}~\mathrm{photons\ cm^{-2}\ s^{-1}}$ (corresponding to luminosity $L_{\rm VHE} \lesssim 10^{45}~\mathrm{erg\ s^{-1}}$) over the entire observation period, and $1.2 \times 10^{-7}~ \mathrm{photons\ cm^{-2}\ s^{-1}}$ ($L_{\rm VHE} \lesssim 10^{49}~\mathrm{erg\ s^{-1}}$) over the total duration of the five FRBs. We constrain the optical U-band flux to be below 8.6 mJy at 5-$\sigma$ level for 1-ms intervals around the FRB arrival times. A bright burst with U-band flux $29~\mathrm{mJy}$ and duration $\sim 12$ ms was detected 4.3 s before the arrival of one FRB. However, the probability of spuriously detecting such a signal within the sampled time space is 1.5% (2.2 $\sigma$, post-trial), i.e. consistent with the expected background. We discuss the implications of the obtained upper limits for constraining FRB models., Comment: 9 pages, 3 figures. Accepted for publication in MNRAS the 2nd September 2018
Published: 2018

40. Detection of the blazar S4 0954+65 at very-high-energy with the MAGIC telescopes during an exceptionally high optical state

Author: M. Hayashida, Satoshi Masuda, Arka Chatterjee, Juan Abel Barrio, D. Fidalgo, Yu. V. Troitskaya, Svetlana G. Jorstad, Emilia Järvelä, Marc Ribó, J. A. Acosta Pulido, Wrijupan Bhattacharyya, L. Maraschi, Kari Nilsson, P. Bangale, Hidetoshi Kubo, J. Hose, Stefano Ansoldi, Yusuke Konno, D. Elsaesser, Riccardo Paoletti, Tomislav Terzić, Francesco Longo, Elina Lindfors, P. G. Prada Moroni, Daniel Mazin, G. A. Borman, Alessandro Carosi, V. Fallah Ramazani, J. Palacio, D. Ninci, Kazuma Ishio, Pratik Majumdar, A. Berti, J. M. Paredes, Antonio Stamerra, N. Torres-Albà, J. Kushida, M. V. Fonseca, Jose Luis Contreras, M. Peresano, M. Makariev, G. Bonnoli, D. Kuveždić, Tarek M. Hassan, W. Bednarek, G. Pedaletti, Juan Cortina, Fabrizio Tavecchio, Martin Will, Chiara Righi, R. Ch. Berse, Ll. Font, Razmik Mirzoyan, Rodolfo Carosi, Dario Hrupec, Jose Miguel Miranda, J. Becerra González, M. A. Lopez, J. R. Garcia, Marina Manganaro, U. Barres de Almeida, P. Temnikov, E. Colombo, Oscar Blanch, T. S. Grishina, Mitsunari Takahashi, Stefano Covino, Louis Antonelli, Damir Lelas, Valeri M. Larionov, Aaron Dominguez, D. Galindo, Merja Tornikoski, Sergey S. Savchenko, Francesco Dazzi, Manuel Delfino, D. Dominis Prester, Wolfgang Rhode, Nikola Godinovic, Shimpei Tsujimoto, Tomoki Saito, Giovanni Ceribella, A. A. Vasilyev, Ana Babić, P. Cumani, L. O. Takalo, Konstancja Satalecka, L. Nogués, Michele Doro, Max Ludwig Ahnen, Dorota Sobczyńska, R. Ojha, K. Mielke, J. Finke, E. Moretti, Ievgen Vovk, P. Giammaria, Jordi Delgado, F. Di Pierro, Camilla Maggio, Daniela Dorner, Dariusz Gora, M. Gaug, G. Vanzo, C. Protasio, J. Herrera, D. Hadasch, Alba Fernández-Barral, Carolina Casadio, Anne Lähteenmäki, Mosè Mariotti, Masahiro Teshima, Alexander Hahn, E. Prandini, Cosimo Nigro, M. Nievas Rosillo, T. Nagayoshi, Kyoshi Nishijima, M. Minev, Iva Šnidarić, T. Schweizer, J. E. Ward, Sidika Merve Colak, E. N. Kopatskaya, A. Niedzwiecki, Koji Noda, Elisa Bernardini, Ivan S. Troitsky, David Paneque, D. Guberman, Saverio Lombardi, Andrea Rugliancich, V. Ramakrishnan, M. I. Martínez, Sabrina Einecke, Ivica Puljak, Pierre Colin, Markus Garczarczyk, M. I. Carnerero, Talvikki Hovatta, Sol N. Molina, P. Da Vela, Julian Sitarek, S. Paiano, Karl Mannheim, D. A. Morozova, A. De Angelis, A. Treves, Vitaly Neustroev, M. Vazquez Acosta, L. V. Larionova, G. Maneva, I. Agudo, Adrian Biland, Tihomir Surić, J. Rico, Dominik Baack, Alan P. Marscher, Christian Fruck, Victoria Moreno, Darko Zarić, B. De Lotto, Abelardo Moralejo, I. Reichardt, Mark Gurwell, B. Banerjee, Marcel Strzys, C. Arcaro, R. J. García López, Massimo Persic, Yasuyuki T. Tanaka, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Baack, D., Babić, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Bednarek, W., Bernardini, E., Berse, R. Ch., Berti, A., Bhattacharyya, W., Biland, A., Blanch, O., Bonnoli, G., Carosi, R., Carosi, A., Ceribella, G., Chatterjee, A., Colak, S. M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Di Pierro, F., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Elsaesser, D., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Masuda, S., Mazin, D., Mielke, K., Minev, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Nagayoshi, T., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nigro, C., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Saito, T., Satalecka, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takahashi, M., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Torres-Albà, N., Treves, A., Tsujimoto, S., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Becerra González, J., Tanaka, Y., Ojha, R., Finke, J., Lähteenmäki, A., Järvelä, E., Tornikoski, M., Ramakrishnan, V., Hovatta, T., Jorstad, S. G., Marscher, A. P., Larionov, V. M., Borman, G. A., Grishina, T. S., Kopatskaya, E. N., Larionova, L. V., Morozova, D. A., Savchenko, S. S., Troitskaya, Yu. V., Troitsky, I. S., Vasilyev, A. A., Agudo, I., Molina, S. N., Casadio, C., Gurwell, M., Carnerero, M. I., Protasio, C., Acosta Pulido, J. A., Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, Federal Ministry of Education and Research (Germany), Junta de Andalucía, Max Planck Society, Universitat de Barcelona, Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: individual: S4 0954+65 [BL Lacertae objects], Active galactic nucleus, active [Galaxies], BL Lacertae objects: individual: S4 0954+65, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Galaxies: active, Gamma rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, 0103 physical sciences, Gamma ray astronomy, Astronomia de raigs gamma, gamma rays:galaxies, galaxies:active, BL Lacertae objects:individual:S40954+65, Blazar, 010303 astronomy & astrophysics, Quasars, Astrophysics::Galaxy Astrophysics, Quàsars, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, gamma rays: galaxies, galaxies: active, galaxie [Gamma rays], 010308 nuclear & particles physics, Compton scattering, Optical polarization, Quasar, Astronomy and Astrophysic, Galaxies, Redshift, Galàxies, galaxies [gamma rays], ddc:520, Spectral energy distribution, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, Radio wave
Abstract: The very high energy (VHE ¿ 100 GeV) -ray MAGIC observations of the blazar S4 0954+65, were triggered by an exceptionally high flux state of emission in the optical. This blazar has a disputed redshift of z = 0.368 or z ¿ 0.45 and an uncertain classification among blazar subclasses. The exceptional source state described here makes for an excellent opportunity to understand physical processes in the jet of S4 0954+65 and thus contribute to its classification. Methods. We investigated the multiwavelength (MWL) light curve and spectral energy distribution (SED) of the S4 0954+65 blazar during an enhanced state in February 2015 and have put it in context with possible emission scenarios. We collected photometric data in radio, optical, X-ray, and ¿-ray. We studied both the optical polarization and the inner parsec-scale jet behavior with 43 GHz data. Results. Observations with the MAGIC telescopes led to the first detection of S4 0954+65 at VHE. Simultaneous data with Fermi-LAT at high energy ¿-ray(HE, 100 MeV < E < 100 GeV) also show a period of increased activity. Imaging at 43 GHz reveals the emergence of a new feature in the radio jet in coincidence with the VHE flare. Simultaneous monitoring of the optical polarization angle reveals a rotation of approximately 100. Conclusions. The high emission state during the flare allows us to compile the simultaneous broadband SED and to characterize it in the scope of blazar jet emission models. The broadband spectrum can be modeled with an emission mechanism commonly invoked for flat spectrum radio quasars (FSRQs), that is, inverse Compton scattering on an external soft photon field from the dust torus, also known as external Compton. The light curve and SED phenomenology is consistent with an interpretation of a blob propagating through a helical structured magnetic field and eventually crossing a standing shock in the jet, a scenario typically applied to FSRQs and low-frequency peaked BL Lac objects (LBL). © ESO 2018., The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia “Severo Ochoa” SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia “María de Maeztu” MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project IP-2016-06-9782 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, the Polish National Research Centre grant UMO-2016/22/M/ST9/00382 and by the Brazilian MCTIC, CNPq, and FAPERJ. IA acknowledges support by a Ramón y Cajal grant of the Ministerio de Economía, Industria y Competitividad (MINECO) of Spain. The research at the IAA–CSIC was supported in part by the MINECO through grants AYA2016–80889–P, AYA2013–40825–P, and AYA2010–14844, and by the regional government of Andalucía through grant P09–FQM–4784.
Published: 2018

41. The THESEUS space mission concept: science case, design and expected performances

Author: Martino Marisaldi, Enrico Bozzo, Valerie Connaughton, Dorottya Szécsi, D. Malesani, L. Maraschi, B. Cordier, P. D'Avanzo, Salvatore Capozziello, Darach Watson, C. Contini, Maryam Modjaz, Pierluigi Bellutti, M. de Pasquale, C. Guidorzi, Colleen A. Wilson-Hodge, O. Boulade, C. Adami, Y. Evangelista, A. Argan, Johan P. U. Fynbo, Y.-W. Dong, Poshak Gandhi, Allan Hornstrup, Eliana Palazzi, Andrea Bulgarelli, Andrea Comastri, E. Geza, Luciano Burderi, Giuseppe Malaguti, D. de Martino, Irfan Kuvvetli, S.-N. Zhang, Claudio Labanti, Fiamma Capitanio, Luca Izzo, Bradley Cenko, A. Melandri, Umberto Maio, Nicola Omodei, Stefano Ettori, C. Butler, S. D. Vergani, S. Zhang, Lajos G. Balázs, Patricia Schady, Federica B. Bianco, M. Branchesi, Jens Hjorth, Jochen Greiner, Felix Ryde, Jean-Gabriel Cuby, Piero Malcovati, Lorraine Hanlon, Peter G. Jonker, M. Della Valle, Elena Pian, Piotr Orleanski, Etienne Renotte, W. Skidmore, L. Sabau-Graziati, Mauro Dadina, Carl Budtz-Jørgensen, Tomaz Rodic, Giancarlo Ghirlanda, Luigi Piro, Sheila McBreen, M. Fiorini, M. Topinka, Jan Harms, Riccardo Ciolfi, Yi Chen, Giacomo Vianello, Ester Piedipalumbo, Zsolt Bagoly, Aniello Grado, Yuki Kaneko, Vito Sguera, B. Morelli, E. Le Floc'h, Luciano Rezzolla, K. Wiersema, Remo Ruffini, E. Del Monte, J. P. Osborne, M. G. Bernardini, A. Gomboc, A. De Luca, Stefano Covino, Ian Hutchinson, A. Antonelli, Enzo Brocato, Mark R. Sims, M. Razzano, Elisabetta Maiorano, Jean-Luc Atteia, J. Zicha, S. Korpela, Eros Vanzella, V. D'Elia, M. H. P. M. van Putten, Marco Feroci, Carole Mundell, A. V. Penacchioni, J. Soomin, Gabriele Ghisellini, Sandra Savaglio, N. Shigehiro, Andrea Santangelo, Antonio Martin-Carrillo, Avishay Gal-Yam, A. M. Read, Piergiorgio Casella, Giuseppe Baldazzi, B. Ciardi, Pawan Kumar, Li Song, V. Lebrun, G. Zampa, Daisuke Yonetoku, S. Vojtech, Gregor Rauw, Piero Rosati, A. J. Castro-Tirado, Bruce Gendre, Tsvi Piran, A. Rachevski, S. Basa, T. Li, Michela Uslenghi, Gianluca Morgante, Michèle Lavagna, Pascal Chardonnet, Andrew MacFadyen, Asaf Pe'er, Sandro Mereghetti, Alessandro Drago, M. Hafizi, Richard Willingale, D. Morris, Bing Zhang, Paolo Giommi, Andrea Ferrara, Mauro Orlandini, Maria Giovanna Dainotti, N. Masetti, Yuji Urata, Maxim Lyutikov, A. Vacchi, László L. Kiss, E. Campolongo, M. Boer, Lorenzo Amati, Diego Götz, Andrew Blain, M. T. Botticella, C. Tenzer, Monica Colpi, Victor Reglero, Roberto Mignani, Michael S. Briggs, Joseph Caruana, Elizabeth R. Stanway, S. Colafrancesco, Francesca Panessa, H. U. Nargaard-Nielsen, F. Lu, Giuseppe Bertuccio, A. Paizis, P. Romano, S. Vercellone, Luciano Nicastro, S. Paltani, G. Pareschi, G. Stratta, V. Petrosian, João Braga, N. Zampa, Nial Tanvir, James E. Rhoads, Raffaella Margutti, Luca Valenziano, Søren Brandt, S. Boci, Andrea Rossi, Paul J. Callanan, Annalisa Celotti, N. Kawai, René Hudec, Francesco Longo, Primo Attina, G. L. Israel, F. Fuschino, Fabio Finelli, M. Hernanz, Ruben Salvaterra, F. Frontera, P. T. O'Brien, Sergio Campana, Rupal Basak, Riccardo Campana, Eleonora Troja, Jordan Camp, Petr Páta, S. Piranomonte, G. Tagliaferri, Sylvain Guiriec, R. L. C. Starling, B. B. Zhang, Natalia Auricchio, Serena Vinciguerra, Département d'Astrophysique (ex SAP) (DAP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Galaxies, Etoiles, Physique, Instrumentation (GEPI), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux (ARTEMIS), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Agenzia Spaziale Italiana, European Commission, Czech Grant Agency, ITA, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), THESEUS, Amati, L, O'Brien, P, Götz, D, Bozzo, E, Tenzer, C, Frontera, F, Ghirlanda, G, Labanti, C, Osborne, J, Stratta, G, Tanvir, N, Willingale, R, Attina, P, Campana, R, Castro-Tirado, A, Contini, C, Fuschino, F, Gomboc, A, Hudec, R, Orleanski, P, Renotte, E, Rodic, T, Bagoly, Z, Blain, A, Callanan, P, Covino, S, Ferrara, A, Le Floch, E, Marisaldi, M, Mereghetti, S, Rosati, P, Vacchi, A, D'Avanzo, P, Giommi, P, Piranomonte, S, Piro, L, Reglero, V, Rossi, A, Santangelo, A, Salvaterra, R, Tagliaferri, G, Vergani, S, Vinciguerra, S, Briggs, M, Campolongo, E, Ciolfi, R, Connaughton, V, Cordier, B, Morelli, B, Orlandini, M, Adami, C, Argan, A, Atteia, J, Auricchio, N, Balazs, L, Baldazzi, G, Basa, S, Basak, R, Bellutti, P, Bernardini, M, Bertuccio, G, Braga, J, Branchesi, M, Brandt, S, Brocato, E, Budtz-Jorgensen, C, Bulgarelli, A, Burderi, L, Camp, J, Capozziello, S, Caruana, J, Casella, P, Cenko, B, Chardonnet, P, Ciardi, B, Colafrancesco, S, Dainotti, M, D'Elia, V, De Martino, D, De Pasquale, M, Del Monte, E, Della Valle, M, Drago, A, Evangelista, Y, Feroci, M, Finelli, F, Fiorini, M, Fynbo, J, Gal-Yam, A, Gendre, B, Ghisellini, G, Grado, A, Guidorzi, C, Hafizi, M, Hanlon, L, Hjorth, J, Izzo, L, Kiss, L, Kumar, P, Kuvvetli, I, Lavagna, M, Li, T, Longo, F, Lyutikov, M, Maio, U, Maiorano, E, Malcovati, P, Malesani, D, Margutti, R, Martin-Carrillo, A, Masetti, N, Mcbreen, S, Mignani, R, Morgante, G, Mundell, C, Nargaard-Nielsen, H, Nicastro, L, Palazzi, E, Paltani, S, Panessa, F, Pareschi, G, Pe'Er, A, Penacchioni, A, Pian, E, Piedipalumbo, E, Piran, T, Rauw, G, Razzano, M, Read, A, Rezzolla, L, Romano, P, Ruffini, R, Savaglio, S, Sguera, V, Schady, P, Skidmore, W, Song, L, Stanway, E, Starling, R, Topinka, M, Troja, E, van Putten, M, Vanzella, E, Vercellone, S, Wilson-Hodge, C, Yonetoku, D, Zampa, G, Zampa, N, Zhang, B, Zhang, S, Antonelli, A, Bianco, F, Boci, S, Boer, M, Botticella, M, Boulade, O, Butler, C, Campana, S, Capitanio, F, Celotti, A, Chen, Y, Colpi, M, Comastri, A, Cuby, J, Dadina, M, De Luca, A, Dong, Y, Ettori, S, Gandhi, P, Geza, E, Greiner, J, Guiriec, S, Harms, J, Hernanz, M, Hornstrup, A, Hutchinson, I, Israel, G, Jonker, P, Kaneko, Y, Kawai, N, Wiersema, K, Korpela, S, Lebrun, V, Lu, F, Macfadyen, A, Malaguti, G, Maraschi, L, Melandri, A, Modjaz, M, Morris, D, Omodei, N, Paizis, A, Páta, P, Petrosian, V, Rachevski, A, Rhoads, J, Ryde, F, Sabau-Graziati, L, Shigehiro, N, Sims, M, Soomin, J, Szécsi, D, Urata, Y, Uslenghi, M, Valenziano, L, Vianello, G, Vojtech, S, Watson, D, Zicha, J, Amati, L., O'Brien, P., Götz, D., Bozzo, E., Tenzer, C., Frontera, F., Ghirlanda, G., Labanti, C., Osborne, J. P., Stratta, G., Tanvir, N., Willingale, R., Attina, P., Campana, R., Castro-Tirado, A. J., Contini, C., Fuschino, F., Gomboc, A., Hudec, R., Orleanski, P., Renotte, E., Rodic, T., Bagoly, Z., Blain, A., Callanan, P., Covino, S., Ferrara, A., Le Floch, E., Marisaldi, M., Mereghetti, S., Rosati, P., Vacchi, A., D'Avanzo, P., Giommi, P., Piranomonte, S., Piro, L., Reglero, V., Rossi, A., Santangelo, A., Salvaterra, R., Tagliaferri, G., Vergani, S., Vinciguerra, S., Briggs, M., Campolongo, E., Ciolfi, R., Connaughton, V., Cordier, B., Morelli, B., Orlandini, M., Adami, C., Argan, A., Atteia, J. -L., Auricchio, N., Balazs, L., Baldazzi, G., Basa, S., Basak, R., Gian Luca, Israel, Bellutti, P., Bernardini, M. G., Bertuccio, G., Braga, J., Branchesi, M., Brandt, S., Brocato, E., Budtz-Jorgensen, C., Bulgarelli, A., Burderi, L., Camp, J., Capozziello, S., Caruana, J., Casella, P., Cenko, B., Chardonnet, P., Ciardi, B., Colafrancesco, S., Dainotti, M. G., D'Elia, V., De Martino, D., De Pasquale, M., Del Monte, E., Della Valle, M., Drago, A., Evangelista, Y., Feroci, M., Finelli, F., Fiorini, M., Fynbo, J., Gal-Yam, A., Gendre, B., Ghisellini, G., Grado, A., Guidorzi, C., Hafizi, M., Hanlon, L., Hjorth, J., Izzo, L., Kiss, L., Kumar, P., Kuvvetli, I., Lavagna, M., Li, T., Longo, F., Lyutikov, M., Maio, U., Maiorano, E., Malcovati, P., Malesani, D., Margutti, R., Martin-Carrillo, A., Masetti, N., Mcbreen, S., Mignani, R., Morgante, G., Mundell, C., Nargaard-Nielsen, H. U., Nicastro, L., Palazzi, E., Paltani, S., Panessa, F., Pareschi, G., Pe'Er, A., Penacchioni, A. V., Pian, E., Piedipalumbo, E., Piran, T., Rauw, G., Razzano, M., Read, A., Rezzolla, L., Romano, P., Ruffini, R., Savaglio, S., Sguera, V., Schady, P., Skidmore, W., Song, L., Stanway, E., Starling, R., Topinka, M., Troja, E., van Putten, M., Vanzella, E., Vercellone, S., Wilson-Hodge, C., Yonetoku, D., Zampa, G., Zampa, N., Zhang, B., Zhang, B. B., Zhang, S., Zhang, S. -N., Antonelli, A., Bianco, F., Boci, S., Boer, M., Botticella, M. T., Boulade, O., Butler, C., Campana, S., Capitanio, F., Celotti, A., Chen, Y., Colpi, M., Comastri, A., Cuby, J. -G., Dadina, M., De Luca, A., Dong, Y. -W., Ettori, S., Gandhi, P., Geza, E., Greiner, J., Guiriec, S., Harms, J., Hernanz, M., Hornstrup, A., Hutchinson, I., Israel, G., Jonker, P., Kaneko, Y., Kawai, N., Wiersema, K., Korpela, S., Lebrun, V., Lu, F., Macfadyen, A., Malaguti, G., Maraschi, L., Melandri, A., Modjaz, M., Morris, D., Omodei, N., Paizis, A., Páta, P., Petrosian, V., Rachevski, A., Rhoads, J., Ryde, F., Sabau-Graziati, L., Shigehiro, N., Sims, M., Soomin, J., Szécsi, D., Urata, Y., Uslenghi, M., Valenziano, L., Vianello, G., Vojtech, S., Watson, D., Zicha, J., Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE31-0003,BEaPro,Using the most powerful explosion as probes of the high-redshift Universe(2016), Galaxies, Etoiles, Physique, Instrumentation ( GEPI ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Marseille ( LAM ), Aix Marseille Université ( AMU ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National d'Etudes Spatiales ( CNES ) -Centre National de la Recherche Scientifique ( CNRS ), Institut de recherche en astrophysique et planétologie ( IRAP ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Annecy-le-Vieux de Physique Théorique ( LAPTH ), Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux ( ARTEMIS ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de la Côte d'Azur, Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Gotz, D., Pata, P., Szecsi, D., Department of Physics, and Amati, L. and O'Brien, P. and Götz, D. and Bozzo, E. and Tenzer, C. and Frontera, F. and Ghirlanda, G. and Labanti, C. and Osborne, J.P. and Stratta, G. and Tanvir, N. and Willingale, R. and Attina, P. and Campana, R. and Castro-Tirado, A.J. and Contini, C. and Fuschino, F. and Gomboc, A. and Hudec, R. and Orleanski, P. and Renotte, E. and Rodic, T. and Bagoly, Z. and Blain, A. and Callanan, P. and Covino, S. and Ferrara, A. and Le Floch, E. and Marisaldi, M. and Mereghetti, S. and Rosati, P. and Vacchi, A. and D'Avanzo, P. and Giommi, P. and Piranomonte, S. and Piro, L. and Reglero, V. and Rossi, A. and Santangelo, A. and Salvaterra, R. and Tagliaferri, G. and Vergani, S. and Vinciguerra, S. and Briggs, M. and Campolongo, E. and Ciolfi, R. and Connaughton, V. and Cordier, B. and Morelli, B. and Orlandini, M. and Adami, C. and Argan, A. and Atteia, J.-L. and Auricchio, N. and Balazs, L. and Baldazzi, G. and Basa, S. and Basak, R. and Bellutti, P. and Bernardini, M.G. and Bertuccio, G. and Braga, J. and Branchesi, M. and Brandt, S. and Brocato, E. and Budtz-Jorgensen, C. and Bulgarelli, A. and Burderi, L. and Camp, J. and Capozziello, S. and Caruana, J. and Casella, P. and Cenko, B. and Chardonnet, P. and Ciardi, B. and Colafrancesco, S. and Dainotti, M.G. and D'Elia, V. and De Martino, D. and De Pasquale, M. and Del Monte, E. and Della Valle, M. and Drago, A. and Evangelista, Y. and Feroci, M. and Finelli, F. and Fiorini, M. and Fynbo, J. and Gal-Yam, A. and Gendre, B. and Ghisellini, G. and Grado, A. and Guidorzi, C. and Hafizi, M. and Hanlon, L. and Hjorth, J. and Izzo, L. and Kiss, L. and Kumar, P. and Kuvvetli, I. and Lavagna, M. and Li, T. and Longo, F. and Lyutikov, M. and Maio, U. and Maiorano, E. and Malcovati, P. and Malesani, D. and Margutti, R. and Martin-Carrillo, A. and Masetti, N. and McBreen, S. and Mignani, R. and Morgante, G. and Mundell, C. and Nargaard-Nielsen, H.U. and Nicastro, L. and Palazzi, E. and Paltani, S. and Panessa, F. and Pareschi, G. and Pe'er, A. and Penacchioni, A.V. and Pian, E. and Piedipalumbo, E. and Piran, T. and Rauw, G. and Razzano, M. and Read, A. and Rezzolla, L. and Romano, P. and Ruffini, R. and Savaglio, S. and Sguera, V. and Schady, P. and Skidmore, W. and Song, L. and Stanway, E. and Starling, R. and Topinka, M. and Troja, E. and van Putten, M. and Vanzella, E. and Vercellone, S. and Wilson-Hodge, C. and Yonetoku, D. and Zampa, G. and Zampa, N. and Zhang, B. and Zhang, B.B. and Zhang, S. and Zhang, S.-N. and Antonelli, A. and Bianco, F. and Boci, S. and Boer, M. and Botticella, M.T. and Boulade, O. and Butler, C. and Campana, S. and Capitanio, F. and Celotti, A. and Chen, Y. and Colpi, M. and Comastri, A. and Cuby, J.-G. and Dadina, M. and De Luca, A. and Dong, Y.-W. and Ettori, S. and Gandhi, P. and Geza, E. and Greiner, J. and Guiriec, S. and Harms, J. and Hernanz, M. and Hornstrup, A. and Hutchinson, I. and Israel, G. and Jonker, P. and Kaneko, Y. and Kawai, N. and Wiersema, K. and Korpela, S. and Lebrun, V. and Lu, F. and MacFadyen, A. and Malaguti, G. and Maraschi, L. and Melandri, A. and Modjaz, M. and Morris, D. and Omodei, N. and Paizis, A. and Páta, P. and Petrosian, V. and Rachevski, A. and Rhoads, J. and Ryde, F. and Sabau-Graziati, L. and Shigehiro, N. and Sims, M. and Soomin, J. and Szécsi, D. and Urata, Y. and Uslenghi, M. and Valenziano, L. and Vianello, G. and Vojtech, S. and Watson, D. and Zicha, J.
Subjects: Ionization, Atmospheric Science, cosmological model, Cherenkov Telescope Array, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Astronomy, Dark age, MASSIVE SINGLE STARS, Star formation rates, Gamma ray, 01 natural sciences, Cosmology: observation, localization, law.invention, Astrophysic, Einstein Telescope, observational cosmology, law, Observational cosmology, Re-ionization, Cosmology: observations, Dark ages, First stars, Gamma-ray: bursts, LIGO, observations [Cosmology], Telescope, 010303 astronomy & astrophysics, High sensitivity, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Multi-wavelength, energy: high, sezele, gamma-ray bursts, Aerospace Engineering, Space and Planetary Science, Astrophysics::Instrumentation and Methods for Astrophysics, imaging, star: formation, burst [Gamma-ray], observatory, Geophysics, X rays, Cosmology: observation, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, signature, Star, TIDAL DISRUPTION, Gamma-ray: burst, Astrophysics::High Energy Astrophysical Phenomena, SIMILAR-TO 6, Socio-culturale, FOS: Physical sciences, observation [Cosmology], galaxy: luminosity, X-ray astronomy: instrumentation, 7 CANDIDATE GALAXIES, Astrophysics::Cosmology and Extragalactic Astrophysics, gamma ray: burst, 114 Physical sciences, Settore FIS/03 - Fisica della Materia, X-ray, bursts [Gamma-ray], FIS/05 - ASTRONOMIA E ASTROFISICA, Settore FIS/05 - Astronomia e Astrofisica, First star, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], KAGRA, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, LIGHT CURVES, 010308 nuclear & particles physics, Gravitational wave, gravitational radiation, Astronomy and Astrophysics, 115 Astronomy, Space science, redshift, sensitivity, Redshift, NEUTRON-STAR MERGER, messenger, VIRGO, electromagnetic, LUMINOSITY FUNCTION, BLACK-HOLE, General Earth and Planetary Sciences, Gamma-ray burst, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: THESEUS is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. These goals will be achieved through a unique combination of instruments allowing GRB and X-ray transient detection over a broad field of view (more than 1sr) with 0.5¿1 arcmin localization, an energy band extending from several MeV down to 0.3¿keV and high sensitivity to transient sources in the soft X-ray domain, as well as on-board prompt (few minutes) follow-up with a 0.7¿m class IR telescope with both imaging and spectroscopic capabilities. THESEUS will be perfectly suited for addressing the main open issues in cosmology such as, e.g., star formation rate and metallicity evolution of the inter-stellar and intra-galactic medium up to redshift 10, signatures of Pop III stars, sources and physics of re-ionization, and the faint end of the galaxy luminosity function. In addition, it will provide unprecedented capability to monitor the X-ray variable sky, thus detecting, localizing, and identifying the electromagnetic counterparts to sources of gravitational radiation, which may be routinely detected in the late ¿20s/early ¿30s by next generation facilities like aLIGO/ aVirgo, eLISA, KAGRA, and Einstein Telescope. THESEUS will also provide powerful synergies with the next generation of multi-wavelength observatories (e.g., LSST, ELT, SKA, CTA, ATHENA).© 2018 COSPAR, S.E. acknowledges the financial support from contracts ASI-INAF 1/009/10/0, NARO15 ASI-INAF 1/037/12/0 and ASI 2015-046-R.0. R.H. acknowledges GACR grant 13-33324S. S.V. research leading to these results has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 606176. D.S. was supported by the Czech grant 1601116S GA CR. Maria Giovanna Dainotti acknowledges funding from the European Union through the Marie Curie Action FP7-PEOPLE-2013-IOF, under grant agreement No. 626267 (>Cosmological Candles>).
Published: 2018

42. MAGIC detection of short-term variability of the high-peaked BL Lac object 1ES 0806+524

Author: A. De Angelis, A. Treves, Vitaly Neustroev, R. Zanin, Adrian Biland, J. Rico, G. Maneva, Dario Hrupec, Thomas Bretz, M. Palatiello, Dario Gasparrini, I. Lozano, M. A. Lopez, A. González Muñoz, Louis Antonelli, Walter Max-Moerbeck, Diego F. Torres, Jelena Aleksić, R. López-Coto, X. Paredes-Fortuny, A. Niedzwiecki, D. Nakajima, Julian Sitarek, Francesco Dazzi, A. Fernández-Barral, Patrick Vogler, P. Munar-Adrover, J. M. Paredes, J. Kushida, Jose Luis Contreras, Masahiro Teshima, Ivica Puljak, Filippo D'Ammando, Daniela Dorner, K. Mallot, Wolfgang Rhode, Pierre Colin, R. J. García López, Elina Lindfors, A. Sillanpää, Juan Abel Barrio, David Paneque, Juan Cortina, C. Fruck, M. Gaug, D. Fidalgo, T. Toyama, Antonio Stamerra, Daniel Mazin, Takashi Saito, J. Krause, W. Bednarek, J. Herrera, B. De Lotto, Fabrizio Tavecchio, Julia Thaele, S. N. Shore, K. Berger, Ll. Font, Koji Noda, Reiko Orito, Elisa Bernardini, J. Hose, I. Snidaric, J. L. Richards, D. Elsaesser, E. de Oña Wilhelmi, Francesco Longo, H. Takami, Abelardo Moralejo, K. Nishijima, F. Di Pierro, C. Delgado Mendez, D. Dominis Prester, T. Steinbring, Massimo Persic, Yusuke Konno, Juri Poutanen, E. Lorenz, M. Hayashida, Stefano Covino, G. De Caneva, M. V. Fonseca, Kari Nilsson, K. Kodani, Y. Hanabata, K. Saito, G. Bonnoli, Talvikki Hovatta, M. Will, Marc Ribó, D. Tescaro, P. Antoranz, Konstancja Satalecka, R. Reinthal, P. Temnikov, Michele Doro, M. L. Knoetig, S. Buson, Razmik Mirzoyan, Hidetoshi Kubo, P. G. Prada Moroni, D. Garrido Terrats, Damir Lelas, V. Scalzotto, Nikola Godinovic, Benito Marcote, Dorota Sobczyńska, Oscar Blanch, Ana Babić, P. Da Vela, Stefano Ansoldi, T. Schweizer, Riccardo Paoletti, E. Prandini, F. Borracci, Alessandro Carosi, D. Hadasch, Jose Miguel Miranda, C. Schultz, V. Scapin, Anthony C. S. Readhead, M. Strzys, L. Maraschi, B. Biasuzzi, Tomislav Terzić, D. Galindo, M. I. Martínez, P. Bangale, Sabrina Einecke, S. R. Gozzini, J. Rodriguez Garcia, M. Makariev, U. Menzel, W. Idec, E. Colombo, L. O. Takalo, Mosè Mariotti, A.-K. Overkemping, Saverio Lombardi, Hanna Kellermann, K. Frantzen, V. Kadenius, S. Bonnefoy, S. Paiano, Karl Mannheim, D. Eisenacher, E. Carmona, Markus Garczarczyk, Alicia López-Oramas, Natalia Lewandowska, A. La Barbera, M. Nievas Rosillo, J. Becerra González, Aalto-yliopisto, Aalto University, Aleksi , J., Ansoldi, Stefano, Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., Barrio, J. A., Becerra Gonzalez, J., Bednarek, W., Bernardini, E., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., de Ona Wilhelmi, E., Delgado Mendez, C., Di Pierro, F., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher, D., Elsaesser, D., Fernandez Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Galindo, D., Garcia Lopez, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Godinovi , N., Gonzalez Munoz, A., Gozzini, S. R., Hadasch, D., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Knoetig, M. L., Kodani, K., Konno, Y., Krause, J., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Longo, Francesco, Lopez, M., Lopez Coto, R., Lopez Oramas, A., Lorenz, E., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar Adrover, P., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Persic, M., Poutanen, J., Prada Moroni, P. G., Prandini, E., Puljak, I., Reinthal, R., Rhode, W., Ribo, M., Rico, J., Rodriguez Garcia, J., Saito, T., Saito, K., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Steinbring, T., Strzys, M., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzi , T., Tescaro, D., Teshima, M., Thaele, J., Torres, D. F., Toyama, T., Treves, A., Vogler, P., Will, M., Zanin, R., Berger, K., Buson, S., D'Ammando, F., Gasparrini, D., Hovatta, T., Max Moerbeck, W., Readhead, A., and Richards, J.
Subjects: radiation mechanisms: non-thermal, galaxies: active, BL Lacertae objects: individual: 1ES 0806+524, galaxies: jets, gamma rays: galaxies, Astrophysics::High Energy Astrophysical Phenomena, astro-ph.GA, galaxies: active, jets [galaxies], Flux, FOS: Physical sciences, radiation mechanisms: non-thermal, BL Lacertae objects: individual: 1ES 0806+524, galaxies: jets, gamma rays: galaxies, individual: 1ES 0806+524 [BL Lacertae objects], Astrophysics, law.invention, law, MAGIC (telescope), Blazar, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), astro-ph.HE, ta115, ta213, Compton scattering, Astronomy, Astronomy and Astrophysics, non-thermal [radiation mechanisms], non-thermal, galaxies: active, BL Lacertae objects: individual: 1ES 0806+524, galaxies: jets, gamma rays: galaxies [radiation mechanisms], Astrophysics - Astrophysics of Galaxies, Galaxies: active, Galaxies: jets, Gamma rays: galaxies, Radiation mechanisms: non-thermal, Space and Planetary Science, Crab Nebula, Astrophysics of Galaxies (astro-ph.GA), active [galaxies], galaxies [gamma rays], ddc:520, Spectral energy distribution, Astrophysics - High Energy Astrophysical Phenomena, BL Lac object, Flare
Abstract: Monthly notices of the Royal Astronomical Society 451(1), 739 - 750 (2015). doi:10.1093/mnras/stv895, The high-frequency-peaked BL Lac (HBL) 1ES 0806+524 (z = 0.138) was discovered in very high energy (VHE) γ-rays in 2008. Until now, the broad-band spectrum of 1ES 0806+524 has been only poorly characterized, in particular at high energies. We analysed multiwavelength observations from γ-rays to radio performed from 2011 January to March, which were triggered by the high activity detected at optical frequencies. These observations constitute the most precise determination of the broad-band emission of 1ES 0806+524 to date. The stereoscopic Major Atmospheric Gamma-Ray Imaging Cherenkov (MAGIC) observations yielded a γ-ray signal above 250 GeV of (3.7 ± 0.7) per cent of the Crab Nebula flux with a statistical significance of 9.9σ. The multiwavelength observations showed significant variability in essentially all energy bands, including a VHE γ-ray flare that lasted less than one night, which provided unprecedented evidence for short-term variability in 1ES 0806+524. The spectrum of this flare is well described by a power law with a photon index of 2.97 ± 0.29 between ∼150 GeV and 1 TeV and an integral flux of (9.3 ± 1.9) per cent of the Crab nebula flux above 250 GeV. The spectrum during the non-flaring VHE activity is compatible with the only available VHE observation performed in 2008 with VERITAS when the source was in a low optical state. The broad-band spectral energy distribution can be described with a one-zone synchrotron self-Compton model with parameters typical for HBLs, indicating that 1ES 0806+524 is not substantially different from the HBLs previously detected., Published by Oxford Univ. Press, Oxford
Published: 2015

43. Very-high-energy gamma-ray observations of the Type Ia Supernova SN 2014J with the MAGIC telescopes

Author: K. Mallot, F. Di Pierro, Francesco Longo, R. J. García López, D. Hadasch, Daniela Dorner, U. Barres de Almeida, Damir Lelas, S. Paiano, Karl Mannheim, W. Idec, Mosè Mariotti, Dariusz Gora, Gaia Vanzo, D. Nakajima, D. Elsaesser, Dorota Sobczyńska, P. Da Vela, M. Gaug, Arka Chatterjee, R. Zanin, Adrian Biland, Saverio Lombardi, Abelardo Moralejo, Wlodek Bednarek, Alessandro Carosi, Max Ludwig Ahnen, J. Becerra González, M. Palatiello, M. Hayashida, Ruben Lopez-Coto, J. Herrera, D. Fidalgo, Martin Makariev, Pratik Majumdar, M. V. Fonseca, Massimo Persic, Alessio Berti, Marc Ribó, P. Bangale, Hidetoshi Kubo, E. Moretti, Alexander Hahn, Dario Hrupec, M. A. Lopez, Francesco Dazzi, A. Fernández-Barral, M. Vazquez Acosta, J. Rico, I. Reichardt, Rodolfo Carosi, Oscar Blanch, E. Colombo, P. Giammaria, P. Temnikov, Gareth Hughes, J. M. Paredes, L. Nogués, B. Biasuzzi, Koji Noda, Stefano Covino, U. Menzel, Antonio Stamerra, K. Kodani, L. O. Takalo, Elisa Bernardini, Kyoshi Nishijima, Nikola Godinovic, Benito Marcote, Jose Miguel Miranda, E. Prandini, L. Perri, Yusuke Konno, Diego F. Torres, M. Doert, M. H. Wu, L. A. Antonelli, M. I. Martínez, M. Garczarczyk, A. La Barbera, Marcel Strzys, S. Bonnefoy, Julian Sitarek, D. Eisenacher Glawion, X. Paredes-Fortuny, M. Peresano, D. Dominis Prester, Sabrina Einecke, B. De Lotto, Kari Nilsson, D. Tescaro, J. Hose, A. Niedzwiecki, C. Fruck, M. Engelkemeier, F. Borracci, M. Nievas Rosillo, M. Will, A. De Angelis, A. Treves, Vitaly Neustroev, R. Mirzoyan, T. Toyama, Fabrizio Tavecchio, T. Surić, J. R. Garcia, David Paneque, A. Sillanpää, Ll. Font, S. Schroeder, Giacomo Bonnoli, L. Maraschi, D. Guberman, D. Garrido Terrats, Ivica Puljak, Pierre Colin, I. Snidaric, V. Fallah Ramazani, Elina Lindfors, Takashi Saito, G. Maneva, J. Palacio, J. E. Ward, Masahiro Teshima, Daniel Mazin, Juan Abel Barrio, E. de Oña Wilhelmi, Ievgen Vovk, Aaron Dominguez, Stefano Ansoldi, P. G. Prada Moroni, T. Schweizer, Riccardo Paoletti, Tomislav Terzić, Marina Manganaro, Ana Babić, D. Galindo, B. Banerjee, C. Arcaro, Juri Poutanen, J. Kushida, G. Pedaletti, Thomas Bretz, Jose Luis Contreras, P. Antoranz, P. Cumani, Konstancja Satalecka, Michele Doro, Juan Cortina, Wolfgang Rhode, K. Frantzen, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Antoranz, P., Arcaro, C., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra GonzÃ¡lez, J., Bednarek, W., Bernardini, E., Berti, Alessio, Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carosi, R., Carosi, A., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., De OnÃ£ Wilhelmi, E., DI Pierro, F., Doert, M., Domãnguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., FernÃ¡ndez Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C, Galindo, D., GarciÃ¡ LÃ³pez, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giammaria, P., Godinoviä , N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kodani, K., Konno, Y., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, Lã³pez, M., LÃ³pez Coto, R., Majumdar, P., Makariev, M., Mallot, K., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martãnez, M., Mazin, D., Menzel, U., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Noguã©s, L., Paiano, S., Palacio, J., Palatiello, Michele, Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Poutanen, J., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribã³, M., Rico, J., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Sillanpaã¤, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Strzys, M., Suriä , T., Takalo, L., Tavecchio, F., Temnikov, P., Terziä , T., Tescaro, D., Teshima, M., Torres, D. F., Toyama, T., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Wu, M. H., and Zanin, R.
Subjects: Individual: SN 2014J [Supernovae], Gamma rays: General, Supernovae: Individual: SN 2014J, Astronomy and Astrophysics, Space and Planetary Science, air, Astrophysics::High Energy Astrophysical Phenomena, Hadron, VHE [gamma ray], FOS: Physical sciences, Astrophysics, Type (model theory), power spectrum, 01 natural sciences, 0103 physical sciences, supernova, MAGIC (telescope), 010303 astronomy & astrophysics, Cherenkov radiation, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Spectral index, 010308 nuclear & particles physics, photon, Gamma ray, imaging, General [Gamma rays], Astronomy and Astrophysic, MAGIC, gamma rays: general, supernovae: individual (SN 2014J), flux, Supernova, Cherenkov counter, ddc:520, high [energy], Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract: In this work we present data from observations with the MAGIC telescopes of SN 2014J detected in January 21 2014, the closest Type Ia supernova since Imaging Air Cherenkov Telescopes started to operate. We probe the possibility of very-high-energy (VHE; $E\geq100$ GeV) gamma rays produced in the early stages of Type Ia supernova explosions. We performed follow-up observations after this supernova explosion for 5 days, between January 27 and February 2 in 2014. We search for gamma-ray signal in the energy range between 100 GeV and several TeV from the location of SN 2014J using data from a total of $\sim5.5$ hours of observations. Prospects for observing gamma-rays of hadronic origin from SN 2014J in the near future are also being addressed. No significant excess was detected from the direction of SN 2014J. Upper limits at 95$\%$ confidence level on the integral flux, assuming a power-law spectrum, d$F/$d$E\propto E^{-\Gamma}$, with a spectral index of $\Gamma=2.6$, for energies higher than 300 GeV and 700 GeV, are established at $1.3\times10^{-12}$ and $4.1\times10^{-13}$ photons~cm$^{-2}$s$^{-1}$, respectively. For the first time, upper limits on the VHE emission of a Type Ia supernova are established. The energy fraction isotropically emitted into TeV gamma rays during the first $\sim10$ days after the supernova explosion for energies greater than 300 GeV is limited to $10^{-6}$ of the total available energy budget ($\sim 10^{51}$ erg). Within the assumed theoretical scenario, the MAGIC upper limits on the VHE emission suggest that SN 2014J will not be detectable in the future by any current or planned generation of Imaging Atmospheric Cherenkov Telescopes., Comment: 5 pages, 2 figures. Accepted for publication in A&A
Published: 2017

44. Observation of the black widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes

Author: M. I. Martínez, Sabrina Einecke, G. Pedaletti, S. R. Gozzini, Thomas Bretz, L. Nogués, E. Moretti, J. Becerra González, Giacomo Bonnoli, F. Di Pierro, M. Engelkemeier, E. Prandini, Francesco Longo, I. Snidaric, Stefano Covino, B. De Lotto, Alessio Berti, S. Bonnefoy, A. Sillanpää, Arka Chatterjee, M. Vazquez Acosta, Ana Babić, Wolfgang Rhode, Alexander Hahn, Nikola Godinovic, Gareth Hughes, B. Biasuzzi, U. Barres de Almeida, D. Elsaesser, Juan Abel Barrio, R. Mirzoyan, Damir Lelas, Victoria Moreno, Tomoki Saito, D. Tescaro, Dario Hrupec, L. Perri, A. De Angelis, A. Treves, Vitaly Neustroev, Stefano Ansoldi, P. Da Vela, M. A. Lopez, Kari Nilsson, D. Dominis Prester, Riccardo Paoletti, Daniela Dorner, S. Griffiths, Dorota Sobczyńska, Dariusz Gora, J. Palacio, M. Will, D. Eisenacher Glawion, Abelardo Moralejo, Gaia Vanzo, Marcel Strzys, X. Paredes-Fortuny, Mosè Mariotti, M. Nievas Rosillo, J. M. Paredes, Antonio Stamerra, Yusuke Konno, S. Schroeder, Ivica Puljak, Pierre Colin, M. Gaug, Tomislav Terzić, L. Maraschi, V. Fallah Ramazani, J. Kushida, Martin Makariev, Elina Lindfors, Jose Luis Contreras, Oscar Blanch, Saverio Lombardi, Christian Fruck, Daniel Mazin, B. Banerjee, C. Arcaro, G. Maneva, Juan Cortina, E. de Oña Wilhelmi, S. Paiano, Kazuma Ishio, Karl Mannheim, J. Herrera, M. Doert, E. Colombo, Adrian Biland, M. H. Wu, L. A. Antonelli, J. R. Garcia, Lucas Guillemot, L. O. Takalo, Koji Noda, Aaron Dominguez, F. Borracci, Elisa Bernardini, J. Rico, Pratik Majumdar, M. V. Fonseca, T. Surić, Masahiro Teshima, Tarek M. Hassan, R. J. García López, J. E. Ward, Fabrizio Tavecchio, Ismaël Cognard, Rodolfo Carosi, Ll. Font, Wlodek Bednarek, Alessandro Carosi, D. Kuveždić, N. Torres-Albà, Max Ludwig Ahnen, I. Reichardt, P. Temnikov, P. Giammaria, Massimo Persic, U. Menzel, Diego F. Torres, M. Garczarczyk, Ievgen Vovk, M. Peresano, T. Schweizer, D. Fidalgo, Juri Poutanen, Julian Sitarek, J. Hose, K. Nishijima, Daniela Hadasch, Francesco Dazzi, A. Fernández-Barral, A. Niedzwiecki, P. G. Prada Moroni, David Paneque, M. Hayashida, D. Guberman, D. Zarić, Marina Manganaro, Marc Ribó, D. Galindo, P. Bangale, Hidetoshi Kubo, P. Cumani, Konstancja Satalecka, Michele Doro, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babić, A., Banerjee, B., Bangale, P., de Almeida, U. Barre, Barrio, J. A., González, J. Becerra, Bednarek, W., Bernardini, E., Berti, Alessio, Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carosi, R., Carosi, A., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Wilhelmi, E. de Oña, Pierro, F. Di, Doert, M., Domínguez, A., Prester, D. Domini, Dorner, D., Doro, M., Einecke, S., Glawion, D. Eisenacher, Elsaesser, D., Engelkemeier, M., Ramazani, V. Fallah, Fernández Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., López, R. J. García, Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Gozzini, S. R., Griffiths, S., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, López, M., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nieva, Nilsson, K., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Poutanen, J., Moroni, P. G. Prada, Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Sillanpää, A., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Torres Albà, N., Treves, A., Vanzo, G., Acosta, M. Vazquez, Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zarić, D., Collaboration), (MAGIC, Cognard, I., Guillemot, L., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Nuclear Physics Division, Bhabha Atomic Research Centre (BARC), Government of India, Department of Atomic Energy-Government of India, Department of Atomic Energy, Politecnico di Milano [Milan] (POLIMI), INAF - Osservatorio Astronomico di Brera (OAB), Istituto Nazionale di Astrofisica (INAF), Technische Universität Dortmund [Dortmund] (TU), Institut de Física d’Altes Energies [Barcelone] (IFAE), Universitat Autònoma de Barcelona (UAB), IEEC-CSIC, Institut de Física d'Altes Energies, Institut d'Estudis Espacials de Catalunya (IEEC-CSIC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Università degli Studi di Udine - University of Udine [Italie], Universita degli Studi di Padova, Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) (MPI-P), Institute for Physical Research (IPR), National Academy of Sciences of the Republic of Armenia [Yerevan] (NAS RA), Universitat de Barcelona (UB), INAF - Osservatorio Astronomico di Trieste (OAT), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Dept. of Physics, Institut de Ciencies del Cosmos (ICCUB), Department of Environment and Energy [Sendai], Tohoku University [Sendai], Optoelectronic Research Centre, University of Southampton, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National d’Études Spatiales [Paris] (CNES), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Padova = University of Padua (Unipd), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)
Subjects: non-thermal, pulsars: general, binaries: close, pulsars: individual: B1957+20, gamma-rays: general [radiation mechanisms], Radiation mechanisms: non-thermal, VHE [gamma ray], Astrophysics, spin, 01 natural sciences, 7. Clean energy, star, emission [pulsar], Millisecond pulsar, Pulsars: general, radiation mechanisms: non-thermal, gamma rays: general, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, High Energy Astrophysical Phenomena (astro-ph.HE), acceleration [electron], Physics, radio wave, Superluminal motion, efficiency [acceleration], non-thermal, binaries: close, pulsars: general, pulsars: individual: B1957+20, gamma-rays: general [radiation mechanisms], inverse [Compton scattering], frequency, compact [binary], symbols, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, upper limit, Active galactic nucleus, Pulsars: individual: B1957+20, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Lorentz covariance, GLAST, Binary pulsar, symbols.namesake, Pulsar, Binaries: close, 0103 physical sciences, interaction [pulsar], plasma, radiation mechanisms: non-thermal, binaries: close, pulsars: general, pulsars: individual: B1957+20, gamma-rays: general, Astrophysics::Galaxy Astrophysics, Gamma-rays: general, Planck energy, ta115, 010308 nuclear & particles physics, Crab Pulsar, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], binary [pulsar], Astronomy and Astrophysics, injection [electron], MAGIC, 13. Climate action, Space and Planetary Science, ddc:520, mass
Abstract: B1957+20 is a millisecond pulsar located in a black-widow-type compact binary system with a low-mass stellar companion. The interaction of the pulsar wind with the companion star wind and/or the interstellar plasma is expected to create plausible conditions for acceleration of electrons to TeV energies and subsequent production of very high-energy γ-rays in the inverse Compton process. We performed extensive observations with the Major Atmospheric Gamma Imaging Cherenkov Telescopes (MAGIC) telescopes of B1957+20. We interpret results in the framework of a few different models, namely emission from the vicinity of the millisecond pulsar, the interaction of the pulsar and stellar companion wind region or bow shock nebula. No significant steady very high-energy γ-ray emission was found. We derived a 95 per cent confidence level upper limit of 3.0 × 10−12 cm−2 s−1 on the average γ-ray emission from the binary system above 200 GeV. The upper limits obtained with the MAGIC constrain, for the first time, different models of the high-energy emission in B1957+20. In particular, in the inner mixed wind nebula model with mono-energetic injection of electrons, the acceleration efficiency of electrons is constrained to be below ∼2–10 per cent of the pulsar spin-down power. For the pulsar emission, the obtained upper limits for each emission peak are well above the exponential cut-off fits to the Fermi-LAT data, extrapolated to energies above 50 GeV. The MAGIC upper limits can rule out a simple power-law tail extension through the sub-TeV energy range for the main peak seen at radio frequencies., Monthly Notices of the Royal Astronomical Society, 470 (4), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711
Published: 2017

45. MAGIC observations of the microquasar V404 Cygni during the 2015 outburst

Author: M. I. Martínez, Sabrina Einecke, Daniela Dorner, Dariusz Gora, A. Sillanpää, R. J. García López, Kazuma Ishio, Gaia Vanzo, A. Loh, Francesco Dazzi, A. Fernández-Barral, A. Niedzwiecki, U. Barres de Almeida, F. Di Pierro, A. De Angelis, Massimo Persic, Damir Lelas, M. Gaug, A. Treves, Vitaly Neustroev, L. Maraschi, Elina Lindfors, B. De Lotto, D. Hadasch, Stefano Ansoldi, David Paneque, Riccardo Paoletti, Dorota Sobczyńska, Daniel Mazin, J. Becerra González, Marcel Strzys, D. Guberman, J. Herrera, M. Vazquez Acosta, Pratik Majumdar, J. Palacio, Marina Manganaro, M. V. Fonseca, Rodolfo Carosi, Jerome Rodriguez, D. Galindo, J. M. Paredes, Christian Fruck, Antonio Stamerra, Giacomo Bonnoli, Koji Noda, B. Biasuzzi, Elisa Bernardini, Stefano Covino, E. Prandini, E. Colombo, Victoria Moreno, P. Cumani, Konstancja Satalecka, Michele Doro, G. Maneva, Tomoki Saito, D. Tescaro, U. Menzel, D. Kuveždić, Alessio Berti, Mosè Mariotti, Adrian Biland, D. Ninci, P. G. Prada Moroni, P. Da Vela, J. Rico, M. Hayashida, S. Schroeder, Ivica Puljak, D. Elsaesser, Diego F. Torres, Juan Abel Barrio, Pierre Colin, Nikola Godinovic, M. Peresano, D. Zarić, M. Garczarczyk, Dario Hrupec, M. Doert, P. Temnikov, Marc Ribó, P. Bangale, M. A. Lopez, Hidetoshi Kubo, Saverio Lombardi, Tomislav Terzić, S. Bonnefoy, Abelardo Moralejo, L. Nogués, M. Engelkemeier, E. Moretti, L. Perri, R. Mirzoyan, Arka Chatterjee, E. de Oña Wilhelmi, S. Griffiths, Ievgen Vovk, D. Fidalgo, J. R. Garcia, Alexander Hahn, Masahiro Teshima, Aaron Dominguez, T. Schweizer, Kyoshi Nishijima, Yusuke Konno, Gareth Hughes, Francesco Longo, D. Eisenacher Glawion, D. Dominis Prester, M. Minev, X. Paredes-Fortuny, Camilla Maggio, M. Nievas Rosillo, I. Reichardt, J. E. Ward, Julian Sitarek, V. Fallah Ramazani, J. Hose, Martin Makariev, Oscar Blanch, Wlodek Bednarek, Alessandro Carosi, S. Paiano, Karl Mannheim, N. Torres-Albà, G. Pedaletti, Wolfgang Rhode, T. Surić, B. Banerjee, C. Arcaro, L. A. Antonelli, Tarek M. Hassan, Fabrizio Tavecchio, Ll. Font, Ana Babić, Max Ludwig Ahnen, J. Kushida, Jose Luis Contreras, P. Giammaria, Juan Cortina, I. Snidaric, L. Takalo, Kari Nilsson, M. Will, Institut de Física d’Altes Energies [Barcelone] (IFAE), Universitat Autònoma de Barcelona (UAB), Max-Planck-Institut für Physik (Werner-Heisenberg-Institut) (MPI-P), Département d'Astrophysique (ex SAP) (DAP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, The German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO (FPA2015-69818-P, FPA2012-36668, FPA2015-68378-P, FPA2015-69210-C6-2-R, FPA2015-69210-C6-4-R, FPA2015-69210-C6-6-R, AYA2015-71042-P, AYA2016-76012-C3-1-P, ESP2015-71662-C2-2-P, CSD2009-00064), and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Spanish Centro de Excelencia \Severo Ochoa' SEV-2012-0234 and SEV-2015-0548, and Unidad de Excelencia \Mara de Maeztu'MDM-2014-0369, by the Croatian Science Foundation (HrZZ) Project 09/176 and the University of Rijeka Project 13.12.1.3.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 2016/22/M/ST9/00382., Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berti, Alessio, Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Carosi, R., Carosi, A., Chatterjee, A., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., de Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Griffiths, S., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Minev, M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Sillanpää, A., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres, D. F., Torres Albà, N., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Zarić, D., Collaboration), (The MAGIC, Loh, A., and Rodriguez, J.
Subjects: Flux, Astrophysics, 7. Clean energy, 01 natural sciences, law.invention, general [, gamma-rays], law, Astrophysics::Solar and Stellar Astrophysics, MAGIC (telescope), 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), radio wave, Gamma-rays: general, Stars: individual: V404 Cygni (V404 Cyg), X-rays: binaries, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, burst, Flare, Radio wave, exceptional, Opacity, gamma-rays: general, stars: individual: V404 Cygni (V404 Cyg), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Compact star, GLAST, VHE, X-ray, 0103 physical sciences, upper limit [flux], quasar, ta115, 010308 nuclear & particles physics, Astronomy, opacity, Astronomy and Astrophysics, Quasar, acceleration, MAGIC, Crab Nebula, 13. Climate action, Space and Planetary Science, gamma ray, [SDU]Sciences of the Universe [physics], ddc:520, binaries [X-rays], individual: V404 Cygni (V404 Cyg) [stars]
Abstract: The microquasar V404 Cygni underwent a series of outbursts in 2015, June 15-31, during which its flux in hard X-rays (20-40 keV) reached about 40 times the Crab Nebula flux. Because of the exceptional interest of the flaring activity from this source, observations at several wavelengths were conducted. The MAGIC telescopes, triggered by the INTEGRAL alerts, followed-up the flaring source for several nights during the period June 18-27, for more than 10 hours. One hour of observation was conducted simultaneously to a giant 22 GHz radio flare and a hint of signal at GeV energies seen by Fermi-LAT. The MAGIC observations did not show significant emission in any of the analysed time intervals. The derived flux upper limit, in the energy range 200--1250 GeV, is 4.8$\times 10^{-12}$ ph cm$^{-2}$ s$^{-1}$. We estimate the gamma-ray opacity during the flaring period, which along with our non-detection, points to an inefficient acceleration in the V404\,Cyg jets if VHE emitter is located further than $1\times 10^{10}$ cm from the compact object., Comment: 7 pages, accepted by MNRAS
Published: 2017

46. OUP accepted manuscript

Author: Kazuma Ishio, Rodolfo Carosi, L. Nogués, E. Moretti, Max Ludwig Ahnen, Giacomo Bonnoli, Adrian Biland, M. Peresano, S. Bonnefoy, R. Mirzoyan, Masahiro Teshima, Marcel Strzys, J. Rico, Abelardo Moralejo, E. Prandini, M. Hayashida, Aaron Dominguez, Valentí Bosch-Ramon, S. Paiano, M. Engelkemeier, Karl Mannheim, Wrijupan Bhattacharyya, Dario Hrupec, M. A. Lopez, A. Niedzwiecki, Ana Babić, P. Giammaria, Stefano Covino, Juan Abel Barrio, D. Zarić, J. Kushida, Jose Luis Contreras, R. Zanin, J. Becerra González, Kyoshi Nishijima, Juan Cortina, R. J. García López, J. E. Ward, David Paneque, Camilla Maggio, U. Barres de Almeida, Wlodek Bednarek, Alessandro Carosi, M. Minev, Nikola Godinovic, I. Reichardt, Tomoki Saito, D. Tescaro, Marc Ribó, Damir Lelas, Josep M. Paredes, Alessio Berti, D. Kuveždić, N. Torres-Albà, Arka Chatterjee, D. Guberman, U. Menzel, L. A. Antonelli, S. A. Trushkin, P. Bangale, L. Perri, Kari Nilsson, L. Maraschi, Massimo Persic, Elina Lindfors, Diego F. Torres, Hidetoshi Kubo, Daniela Dorner, A. De Angelis, Dariusz Gora, M. Vazquez Acosta, D. Fidalgo, M. Will, Dorota Sobczyńska, Gaia Vanzo, D. Eisenacher Glawion, X. Paredes-Fortuny, Daniel Mazin, M. Nievas Rosillo, B. Biasuzzi, A. Treves, Vitaly Neustroev, M. Garczarczyk, G. Pedaletti, Victoria Moreno, M. Gaug, Francesco Dazzi, A. Fernández-Barral, Chiara Righi, M. I. Martínez, T. Surić, Yusuke Konno, J. Herrera, B. De Lotto, Koji Noda, Elisa Bernardini, Pratik Majumdar, P. Temnikov, M. V. Fonseca, S. Schroeder, Ivica Puljak, Guy G. Pooley, Pierre Colin, Sabrina Einecke, Christian Fruck, Marina Manganaro, Tarek M. Hassan, G. Maneva, D. Ninci, Wolfgang Rhode, D. Galindo, E. de Oña Wilhelmi, Fabrizio Tavecchio, Ievgen Vovk, Ll. Font, P. Cumani, T. Schweizer, Konstancja Satalecka, Michele Doro, D. Elsaesser, B. Banerjee, I. Snidaric, C. Arcaro, Stefano Ansoldi, P. G. Prada Moroni, Riccardo Paoletti, Tomislav Terzić, J. Palacio, Antonio Stamerra, Julian Sitarek, J. Hose, F. Di Pierro, D. Dominis Prester, P. Da Vela, V. Fallah Ramazani, Alexander Hahn, Mosè Mariotti, Francesco Longo, Saverio Lombardi, E. Colombo, Martin Makariev, L. O. Takalo, Oscar Blanch, D. Hadasch, M. Doert, and J. R. Garcia
Subjects: Physics, Photon, 010308 nuclear & particles physics, Gamma ray, Flux, Astronomy, Astronomy and Astrophysics, Quasar, Context (language use), Astrophysics, 01 natural sciences, Black hole, 13. Climate action, Space and Planetary Science, 0103 physical sciences, MAGIC (telescope), 010303 astronomy & astrophysics, Radio wave
Abstract: The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black hole transient. During the latter, Cygnus X-1 shows a one-sided relativistic radio-jet. Recent detection of the system in the high energy (HE; E greater than or similar to 60 MeV) gamma-ray range with FermiLAT associates this emission with the outflow. Former MAGIC observations revealed a hint of flaring activity in the very high-energy (VHE; E greater than or similar to 100 GeV) regime during this X-ray state. We analyse ~ to 97 h of Cygnus X-1 data taken with the MAGIC telescopes between July 2007 and October 2014. To shed light on the correlation between hard X-ray and VHE gamma rays as previously suggested, we study each main X-ray state separately. We perform an orbital phase-folded analysis to look for variability in the VHE band. Additionally, to place this variability behaviour in a multiwavelength context, we compare our results with Fermi-LAT, AGILE, Swift-BAT, MAXI, RXTE-ASM, AMI and RATAN-600 data. We do not detect Cygnus X-1 in the VHE regime. We establish upper limits for each X-ray state, assuming a power-law distribution with photon index Γ = 3.2. For steady emission in the hard and soft X-ray states, we set integral upper limits at 95 %per cent confidence level for energies above 200 GeV at 2.6 x 10⁻¹² photons cm⁻² s⁻¹ and 1.0 x 10⁻¹¹ photons cm⁻² s ⁻¹, respectively. We rule out steady VHE gamma-ray emission above this energy range, at the level of theMAGIC sensitivity, originating in the interaction between the relativistic jet and the surrounding medium, while the emission above this flux level produced inside the binary still remains a valid possibility.
Published: 2017

47. Performance of the MAGIC telescopes under moonlight

Author: L. Maraschi, Elina Lindfors, Daniel Mazin, S. Schroeder, Ivica Puljak, U. Menzel, Alexander Hahn, Gareth Hughes, Pierre Colin, M. Doert, M. Vazquez Acosta, E. de Oña Wilhelmi, D. Dominis Prester, Diego F. Torres, J. Palacio, B. Biasuzzi, J. M. Paredes, M. Garczarczyk, Victoria Moreno, V. Fallah Ramazani, S. Paiano, Antonio Stamerra, Stefano Covino, L. Nogués, Karl Mannheim, D. Ninci, A. Niedzwiecki, Kazuma Ishio, A. De Angelis, U. Barres de Almeida, A. Treves, Vitaly Neustroev, R. J. García López, E. Moretti, Damir Lelas, Abelardo Moralejo, Christian Fruck, Dario Hrupec, David Paneque, Dorota Sobczyńska, Francesco Longo, J. Becerra González, Ievgen Vovk, Mosè Mariotti, M. A. Lopez, G. Maneva, Adrian Biland, B. Banerjee, C. Arcaro, G. Pedaletti, T. Surić, J. R. Garcia, E. Prandini, Max Ludwig Ahnen, Louis Antonelli, D. Guberman, Marina Manganaro, Alessio Berti, Aaron Dominguez, M. I. Martínez, Ana Babić, Tomoki Saito, D. Tescaro, J. Kushida, T. Schweizer, P. Temnikov, D. Galindo, J. Rico, Massimo Persic, Arka Chatterjee, M. Minev, I. Reichardt, P. Cumani, Jose Luis Contreras, Konstancja Satalecka, Sabrina Einecke, Michele Doro, Juan Cortina, P. Giammaria, D. Kuveždić, Martin Makariev, J. E. Ward, D. Fidalgo, Giacomo Bonnoli, Julian Sitarek, Rodolfo Carosi, M. Hayashida, Saverio Lombardi, Oscar Blanch, Kyoshi Nishijima, B. De Lotto, L. Perri, J. Hose, Wolfgang Rhode, I. Snidaric, Wrijupan Bhattacharyya, Andrea Rugliancich, Yusuke Konno, D. Zarić, D. Eisenacher Glawion, Marc Ribó, Nikola Godinovic, X. Paredes-Fortuny, D. Elsaesser, Marcel Strzys, M. Nievas Rosillo, P. Bangale, D. Hadasch, Daniela Dorner, F. Di Pierro, Hidetoshi Kubo, Stefano Ansoldi, Riccardo Paoletti, Kari Nilsson, Dariusz Gora, Gaia Vanzo, M. Will, Wlodek Bednarek, Alessandro Carosi, N. Torres-Albà, M. Gaug, P. Da Vela, A. Sillanpää, E. Colombo, J. Herrera, L. O. Takalo, Koji Noda, S. Bonnefoy, Elisa Bernardini, M. Engelkemeier, Tarek M. Hassan, Camilla Maggio, R. Mirzoyan, S. Griffiths, Masahiro Teshima, Fabrizio Tavecchio, Ll. Font, Tomislav Terzić, Juan Abel Barrio, Francesco Dazzi, A. Fernández-Barral, Pratik Majumdar, M. V. Fonseca, M. Peresano, P. G. Prada Moroni, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babiä , A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra GonzÃ¡lez, J., Bednarek, W., Bernardini, E., Berti, Alessio, Bhattacharyya, W., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Carosi, R., Carosi, A., Chatterjee, A., Colin, P, Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., de OÃ±a Wilhelmi, E., Di Pierro, F., Doert, M., Domãnguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., FernÃ¡ndez Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., GarcÃa LÃ³pez, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinoviä , N., Gora, D., Griffiths, S., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveå¾diä , D., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, Lã³pez, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martãnez, M., Mazin, D., Menzel, U., Minev, M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Noguã©s, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribã³, M., Rico, J., Rugliancich, A., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Sillanpã¤ã¤, A., Sitarek, J., Å nidariä , I., Sobczynska, D., Stamerra, A., Strzys, M., Suriä , T., Takalo, L., Tavecchio, F., Temnikov, P., Terziä , T., Tescaro, D., Teshima, M., Torres, D. F., Torres AlbÃ , N., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., and Zariä , D.
Subjects: Moonlight, Photomultiplier, Twilight, media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Cherenkov telescopes, 01 natural sciences, Gamma-ray astronomy, Crab Nebula, Optics, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Cherenkov radiation, media_common, Physics, ta115, 010308 nuclear & particles physics, business.industry, Crab nebula, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Cherenkov telescope, Sky, Duty cycle, ddc:540, Electrónica, Física nuclear, Electricidad, business, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: MAGIC, a system of two imaging atmospheric Cherenkov telescopes, achieves its best performance under dark conditions, i.e. in absence of moonlight or twilight. Since operating the telescopes only during dark time would severely limit the duty cycle, observations are also performed when the Moon is present in the sky. Here we develop a dedicated Moon-adapted analysis to characterize the performance of MAGIC under moonlight. We evaluate energy threshold, angular resolution and sensitivity of MAGIC under different background light levels, based on Crab Nebula observations and tuned Monte Carlo simulations. This study includes observations taken under non-standard hardware configurations, such as reducing the camera photomultiplier tubes gain by a factor ~1.7 (Reduced HV settings) with respect to standard settings (Nominal HV) or using UV-pass filters to strongly reduce the amount of moonlight reaching the cameras of the telescopes. The Crab Nebula spectrum is correctly reconstructed in all the studied illumination levels, that reach up to 30 times brighter than under dark conditions. The main effect of moonlight is an increase in the analysis energy threshold and in the systematic uncertainties on the flux normalization. The sensitivity degradation is constrained to be below 10%, within 15-30% and between 60 and 80% for Nominal HV, Reduced HV and UV-pass filter observations, respectively. No worsening of the angular resolution was found. Thanks to observations during moonlight, the maximal duty cycle of MAGIC can be increased from ~18%, under dark nights only, to up to ~40% in total with only moderate performance degradation., 14 pages, 13 figures, accepted in Astroparticle Physics. Corresponding authors: Daniel Guberman (dguberman@ifae.es) and Pierre Colin (colin@mppmu.mpg.de)
Published: 2017

48. A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A

Author: G. Pedaletti, E. Prandini, Stefano Ansoldi, Riccardo Paoletti, Wolfgang Rhode, A. De Angelis, A. Treves, Vitaly Neustroev, T. Surić, M. I. Martínez, Juan Abel Barrio, M. Engelkemeier, B. De Lotto, S. Bonnefoy, Sabrina Einecke, L. Maraschi, Kazuma Ishio, Elina Lindfors, G. Maneva, J. Kushida, Razmik Mirzoyan, U. Barres de Almeida, Damir Lelas, Rodolfo Carosi, Daniel Mazin, A. Berti, Wlodek Bednarek, Alessandro Carosi, Jose Luis Contreras, Adrian Biland, Chiara Righi, Dorota Sobczyńska, M. Colak, N. Torres-Albà, J. Palacio, M. Hayashida, J. Rico, Camilla Maggio, J. M. Paredes, Antonio Stamerra, B. Banerjee, Daniela Dorner, C. Arcaro, Dariusz Gora, Juan Cortina, Gaia Vanzo, D. Zarić, Arka Chatterjee, S. Schroeder, Marc Ribó, Stefano Covino, Ivica Puljak, Pierre Colin, M. Gaug, Pratik Majumdar, L. Nogués, D. Fidalgo, P. Bangale, M. V. Fonseca, Abelardo Moralejo, E. Moretti, Hidetoshi Kubo, Tomohiro Inada, L. A. Antonelli, J. Herrera, S. N. Shore, E. de Oña Wilhelmi, Martin Will, Petar Temnikov, Koji Noda, Tomoki Saito, D. Tescaro, Marcel Strzys, Elisa Bernardini, Masahiro Teshima, Yusuke Konno, P. G. Prada Moroni, Kyoshi Nishijima, Nikola Godinovic, D. Ninci, D. Kuveždić, Tomislav Terzić, Ievgen Vovk, M. Minev, Tarek M. Hassan, T. Schweizer, I. Reichardt, Fabrizio Tavecchio, A. Niedzwiecki, Ll. Font, I. Snidaric, U. Menzel, M. Peresano, David Paneque, Max Ludwig Ahnen, P. Giammaria, D. Guberman, Marina Manganaro, Ana Babić, D. Galindo, M. Garczarczyk, P. Cumani, Konstancja Satalecka, Michele Doro, Francesco Dazzi, Dario Hrupec, A. Fernández-Barral, M. A. Lopez, R. J. García López, Kari Nilsson, Massimo Persic, F. Di Pierro, D. Dominis Prester, V. Fallah Ramazani, P. Da Vela, Alexander Hahn, Julian Sitarek, J. Hose, M. Vazquez Acosta, B. Biasuzzi, Victoria Moreno, E. Colombo, L. O. Takalo, Aaron Dominguez, D. Hadasch, Francesco Longo, J. E. Ward, Mosè Mariotti, Saverio Lombardi, Martin Makariev, Oscar Blanch, M. Doert, J. R. Garcia, J. Becerra González, Christian Fruck, L. Perri, Giacomo Bonnoli, Wrijupan Bhattacharyya, D. Eisenacher Glawion, D. Elsaesser, M. Nievas Rosillo, S. Paiano, Karl Mannheim, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babić, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berti, A., Bhattacharyya, W., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Carosi, R., Carosi, A., Chatterjee, A., Colak, M., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Cumani, P., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., de Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Gaug, M., Giammaria, P., Godinović, N., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hassan, T., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Inada, T., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuveždić, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., López, M., Maggio, C., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Minev, M., Mirzoyan, R., Moralejo, A., Moreno, V., Moretti, E., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Ninci, D., Nishijima, K., Noda, K., Nogués, L., Paiano, S., Palacio, J., Paneque, D., Paoletti, R., Paredes, J. M., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Prada Moroni, P. G., Prandini, E., Puljak, I., Garcia, J. R., Reichardt, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Shore, S. N., Sitarek, J., Šnidarić, I., Sobczynska, D., Stamerra, A., Strzys, M., Surić, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Torres-Albà, N., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., and Zarić, D.
Subjects: lepton, Astrophysics, power spectrum, 01 natural sciences, Spectral line, Astrophysics::Solar and Stellar Astrophysics, MAGIC (telescope), 010303 astronomy & astrophysics, acceleration of particle, cosmic ray, energy spectrum [gamma ray], acceleration of particles, ISM: supernova remnants, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Spectral index, education.field_of_study, Gamma ray, cosmic rays, gamma rays: general, high [energy], Spectral energy distribution, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::High Energy Astrophysical Phenomena, low [magnetic field], Population, energy spectrum, FOS: Physical sciences, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, GLAST, leptonic [model], emission [gamma ray], supernova, 0103 physical sciences, education, Astrophysics::Galaxy Astrophysics, Computer Science::Information Theory, ta115, 010308 nuclear & particles physics, Astronomy, cosmic ray physics, stars: supernovae: individual: Cassiopeia A, supernova remnants, Astronomy and Astrophysics, acceleration, MAGIC, moment, flux, Cassiopeia A, Space and Planetary Science, ddc:520, galaxy [cosmic radiation], spectral, High Energy Physics::Experiment, supernova remnant [ISM], general [gamma rays]
Abstract: It is widely believed that the bulk of the Galactic cosmic rays are accelerated in supernova remnants (SNRs). However, no observational evidence of the presence of particles of PeV energies in SNRs has yet been found. The young historical SNR Cassiopeia A (Cas A) appears as one of the best candidates to study acceleration processes. Between December 2014 and October 2016 we observed Cas A with the MAGIC telescopes, accumulating 158 hours of good-quality data. We derived the spectrum of the source from 100 GeV to 10 TeV. We also analysed $\sim$8 years of $Fermi$-LAT to obtain the spectral shape between 60 MeV and 500 GeV. The spectra measured by the LAT and MAGIC telescopes are compatible within the errors and show a clear turn off (4.6 $\sigma$) at the highest energies, which can be described with an exponential cut-off at $E_c = 3.5\left(^{+1.6}_{-1.0}\right)_{\textit{stat}} \left(^{+0.8}_{-0.9}\right)_{\textit{sys}}$ TeV. The gamma-ray emission from 60 MeV to 10 TeV can be attributed to a population of high-energy protons with spectral index $\sim$2.2 and energy cut-off at $\sim$10 TeV. This result indicates that Cas A is not contributing to the high energy ($\sim$PeV) cosmic-ray sea in a significant manner at the present moment. A one-zone leptonic model fails to reproduce by itself the multi-wavelength spectral energy distribution. Besides, if a non-negligible fraction of the flux seen by MAGIC is produced by leptons, the radiation should be emitted in a region with a low magnetic field (B$\lessapprox$100$\mu$G) like in the reverse shock.), Comment: 8 pages, 3 figures, submitted to MNRAS. Corresponding authors: Daniel Guberman (dguberman@ifae.es), Emma de O\~na Wilhelmi (wilhelmi@ice.csic.es) and Daniel Galindo (dgalindo@am.ub.es)
Published: 2017

49. Erratum: A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A

Author: MAGIC Collaboration: M L Ahnen, S Ansoldi, L A Antonelli, C Arcaro, A Babić, B Banerjee, P Bangale, U Barres de Almeida, J A Barrio, J Becerra González, W Bednarek, E Bernardini, A Berti, W Bhattacharyya, B Biasuzzi, A Biland, O Blanch, S Bonnefoy, G Bonnoli, R Carosi, A Carosi, A Chatterjee, M Colak, P Colin, E Colombo, J L Contreras, J Cortina, S Covino, P Cumani, P Da Vela, F Dazzi, A De Angelis, B De Lotto, E de Oña Wilhelmi, F Di Pierro, M Doert, A Domínguez, D Dominis Prester, D Dorner, M Doro, S Einecke, D Eisenacher Glawion, D Elsaesser, M Engelkemeier, V Fallah Ramazani, A Fernández-Barral, D Fidalgo, M V Fonseca, L Font, C Fruck, D Galindo, R J García López, M Garczarczyk, M Gaug, P Giammaria, N Godinović, D Gora, D Guberman, D Hadasch, A Hahn, T Hassan, M Hayashida, J Herrera, J Hose, D Hrupec, T Inada, K Ishio, Y Konno, H Kubo, J Kushida, D Kuveždić, D Lelas, E Lindfors, S Lombardi, F Longo, M López, C Maggio, P Majumdar, M Makariev, G Maneva, M Manganaro, K Mannheim, L Maraschi, M Mariotti, M Martínez, D Mazin, U Menzel, M Minev, R Mirzoyan, A Moralejo, V Moreno, E Moretti, V Neustroev, A Niedzwiecki, M Nievas Rosillo, K Nilsson, D Ninci, K Nishijima, K Noda, L Nogués, S Paiano, J Palacio, D Paneque, R Paoletti, J M Paredes, G Pedaletti, M Peresano, L Perri, M Persic, P G Prada Moroni, E Prandini, I Puljak, J R Garcia, I Reichardt, W Rhode, M Ribó, J Rico, C Righi, T Saito, K Satalecka, S Schroeder, T Schweizer, S N Shore, J Sitarek, I Šnidarić, D Sobczynska, A Stamerra, M Strzys, T Surić, L Takalo, F Tavecchio, P Temnikov, T Terzić, D Tescaro, M Teshima, D F Torres, N Torres-Albà, A Treves, G Vanzo, M Vazquez Acosta, I Vovk, J E Ward, M Will, and D Zarić
Subjects: Physics, Cassiopeia A, 010308 nuclear & particles physics, Space and Planetary Science, 0103 physical sciences, Gamma ray, ddc:520, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 010303 astronomy & astrophysics, 01 natural sciences, Spectrum (topology)
Published: 2018

50. Investigating the peculiar emission from the new VHE gamma-ray source H1722+119

Author: M. Hayashida, M. Makariev, B. Biasuzzi, K. Mallot, R. J. García López, Louis Antonelli, D. Dominis Prester, E. Prandini, M. Doert, M. H. Wu, Massimo Persic, F. D'Ammando, Marc Ribó, G. Bonnoli, Abelardo Moralejo, Juri Poutanen, R. Reinthal, V. Fallah Ramazani, P. Bangale, Y. Hanabata, Razmik Mirzoyan, U. Barres de Almeida, Damir Lelas, T. Steinbring, Marina Manganaro, P. G. Prada Moroni, Stefano Covino, Hidetoshi Kubo, P. Antoranz, D. Galindo, J. Becerra González, G. Pedaletti, Dorota Sobczyńska, D. Nakajima, Thomas Bretz, J. Hose, Andrei Berdyugin, Pratik Majumdar, M. V. Fonseca, S. Bonnefoy, A. Sillanpää, Arka Chatterjee, Francesco Longo, D. Elsaesser, F. Di Pierro, K. Kodani, Alexander Hahn, Konstancja Satalecka, Walter Max-Moerbeck, Tomoki Saito, D. Tescaro, Ivica Puljak, Pierre Colin, H. Takami, L. Nogués, U. Menzel, Michele Doro, M. I. Martínez, Gareth Hughes, Talvikki Hovatta, C. Schultz, E. Moretti, Marcel Strzys, D. Fidalgo, Vassil Verguilov, Aaron Dominguez, Diego F. Torres, Julia Thaele, E. de Oña Wilhelmi, Reiko Orito, F. Verrecchia, Sabrina Einecke, Junko Kushida, P. Da Vela, R. López-Coto, J. Rodriguez Garcia, J. E. Ward, M. Palatiello, Elina Lindfors, A. Niedzwiecki, Kyoshi Nishijima, Ievgen Vovk, Wolfgang Rhode, Daniel Mazin, Oscar Blanch, Julian Sitarek, Juan Abel Barrio, L. Maraschi, Francesco Dazzi, David Paneque, A. Fernández-Barral, Markus Garczarczyk, Yusuke Konno, C. Fruck, B. De Lotto, M. Villata, T. Schweizer, T. Toyama, D. Guberman, Tomislav Terzić, K. Frantzen, J. L. Richards, Mosè Mariotti, A.-K. Overkemping, S. Paiano, Saverio Lombardi, Karl Mannheim, D. Hadasch, L. Perri, A. La Barbera, D. Eisenacher Glawion, X. Paredes-Fortuny, P. Temnikov, M. Nievas Rosillo, W. Idec, A. González Muñoz, E. Colombo, B. Banerjee, S. Buson, L. O. Takalo, Masahiro Teshima, Daniela Dorner, R. Zanin, Dariusz Gora, Adrian Biland, M. Gaug, J. Rico, J. Herrera, Koji Noda, Elisa Bernardini, A. De Angelis, A. Treves, Vitaly Neustroev, Jose Luis Contreras, Juan Cortina, G. Maneva, C. M. Raiteri, Nikola Godinovic, Benito Marcote, Max Ludwig Ahnen, Kari Nilsson, P. Giammaria, M. Will, Dario Hrupec, M. A. Lopez, R. Clavero, D. Garrido Terrats, W. Bednarek, Fabrizio Tavecchio, Ll. Font, I. Snidaric, Ana Babić, Stefano Ansoldi, Riccardo Paoletti, J. Palacio, J. M. Paredes, Antonio Stamerra, Alessandro Carosi, Jose Miguel Miranda, F. Borracci, Anthony C. S. Readhead, Universitat de Barcelona, Aalto-yliopisto, Aalto University, Ahnen ML, Ansoldi S, Antonelli LA, Antoranz P, Babic A, Banerjee B, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bernardini E, Biasuzzi B, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bretz T, Buson S, Carosi A, Chatterjee A, Clavero R, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Da Vela P, Dazzi F, De Angelis A, De Lotto B, Wilhelmi ED, Di Pierro F, Doert M, Dominguez A, Prester DD, Dorner D, Doro M, Einecke S, Glawion DE, Elsaesser D, Ramazani VF, Fernandez-Barral A, Fidalgo D, Fonseca MV, Font L, Frantzen K, Fruck C, Galindo D, Lopez RJG, Garczarczyk M, Terrats DG, Gaug M, Giammaria P, Godinovic N, Munoz AG, Gora D, Guberman D, Hadasch D, Hahn A, Hanabata Y, Hayashida M, Herrera J, Hose J, Hrupec D, Hughes G, Idec W, Kodani K, Konno Y, Kubo H, Kushida J, La Barbera A, Lelas D, Lindfors E, Lombardi S, Longo F, Lopez M, Lopez-Coto R, Majumdar P, Makariev M, Mallot K, Maneva G, Manganaro M, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martinez M, Mazin D, Menzel U, Miranda JM, Mirzoyan R, Moralejo A, Moretti E, Nakajima D, Neustroev V, Niedzwiecki A, Rosillo MN, Nilsson K, Nishijima K, Noda K, Nogues L, Orito R, Overkemping A, Paiano S, Palacio J, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Pedaletti G, Perri L, Persic M, Poutanen J, Moroni PGP, Prandini E, Puljak I, Rhode W, Ribo M, Rico J, Garcia JR, Saito T, Satalecka K, Schultz C, Schweizer T, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Stamerra A, Steinbring T, Strzys M, Takalo L, Takami H, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Thaele J, Torres DF, Toyama T, Treves A, Verguilov V, Vovk I, Ward JE, Will M, Wu MH, Zanin R, DAmmando F, Berdyugin A, Hovatta T, Max-Moerbeck W, Raiteri CM, Readhead ACS, Reinthal R, Richards JL, Verrecchia F, Villata M, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Buson, S., Carosi, A., Chatterjee, A., Clavero, R., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., De Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domínguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Fallah Ramazani, V., Fernández Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giammaria, P., Godinović, N., González Muñoz, A., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kodani, K., Konno, Y., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, López, M., López Coto, R., Majumdar, P., Makariev, M., Mallot, K., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martínez, M., Mazin, D., Menzel, U., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Nogués, L., Orito, R., Overkemping, A., Paiano, S., Palacio, J., Palatiello, Michele, Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Perri, L., Persic, M., Poutanen, J., Prada Moroni, P. G., Prandini, E., Puljak, I., Rhode, W., Ribó, M., Rico, J., Rodriguez Garcia, J., Saito, T., Satalecka, K., Schultz, C., Schweizer, T., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Steinbring, T., Strzys, M., Takalo, L., Takami, H., Tavecchio, F., Temnikov, P., Terzić, T, Tescaro, D., Teshima, M., Thaele, J., Torres, D. F., Toyama, T., Treves, A., Verguilov, V., Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zanin, R., D'Ammando, F., Berdyugin, A., Hovatta, T., Max Moerbeck, W., Raiteri, C. M., Readhead, A. C. S., Reinthal, R., Richards, J. L., Verrecchia, F., and Villata, M.
Subjects: galaxie [Gamma-rays], gamma-rays: galaxies, UPGRADE, Astrophysics, DETECTED BLAZARS, 01 natural sciences, LARGE-AREA TELESCOPE, law.invention, Raigs gamma, law, galaxies: active, BL Lacertae objects: individual: H1722+119, galaxies, distances and redshifts, BL LACERTAE OBJECTS, ALL-SKY SURVEY, MAGIC, TELESCOPES, LAC OBJECTS, SOURCE CATALOG, MAJOR, HELICAL JETS, CRAB-NEBULA, MAGIC (telescope), 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), distances and redshift [Galaxies], active BL Lacertae objects, individual, H1722+119 galaxies, distances and redshifts gamma-rays, Galaxies: active, Galaxies: distances and redshifts, Gamma-rays: galaxies, Astronomy and Astrophysics, Space and Planetary Science, galaxies [Gamma-rays], Extragalactic background light, Spectral energy distribution, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, BL Lac object, active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Owens Valley Radio Observatory, Astrophysics::Cosmology and Extragalactic Astrophysics, Telescope, galaxies: active, BL Lacertae objects: individual: H1722+119, galaxies: distances and redshifts, gamma-rays: galaxies, 0103 physical sciences, individual: H1722+119 [BL Lacertae objects], distances and redshifts [Galaxies], ta115, 010308 nuclear & particles physics, Gamma rays, Astronomy, Astronomy and Astrophysic, Redshift, Crab Nebula, 13. Climate action, Galàxies actives, Active galaxies, ddc:520
Abstract: The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescopes observed the BL Lac object H1722+119 (redshift unknown) for six consecutive nights between 2013 May 17 and 22, for a total of 12.5 h. The observations were triggered by high activity in the optical band measured by the KVA (Kungliga Vetenskapsakademien) telescope. The source was for the first time detected in the very high energy (VHE, $E > 100$ GeV) $\gamma$-ray band with a statistical significance of 5.9 $\sigma$. The integral flux above 150 GeV is estimated to be $(2.0\pm 0.5)$ per cent of the Crab Nebula flux. We used contemporaneous high energy (HE, 100 MeV $ < E < 100$ GeV) $\gamma$-ray observations from Fermi-LAT (Large Area Telescope) to estimate the redshift of the source. Within the framework of the current extragalactic background light models, we estimate the redshift to be $z = 0.34 \pm 0.15$. Additionally, we used contemporaneous X-ray to radio data collected by the instruments on board the Swift satellite, the KVA, and the OVRO (Owens Valley Radio Observatory) telescope to study multifrequency characteristics of the source. We found no significant temporal variability of the flux in the HE and VHE bands. The flux in the optical and radio wavebands, on the other hand, did vary with different patterns. The spectral energy distribution (SED) of H1722+119 shows surprising behaviour in the $\sim 3\times10^{14} - 10^{18}$ Hz frequency range. It can be modelled using an inhomogeneous helical jet synchrotron self-Compton model., Comment: 12 pages, 5 figures, 2 tables
Published: 2016

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