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52. First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign

Author

Furniss, A., Noda, K., Boggs, S., Chiang, J., Christensen, F., Craig, W., Giommi, P., Hailey, C., Harisson, F., Madejski, G., Nalewajko, K., PERRI, Matteo, Stern, D., Urry, M., VERRECCHIA, Francesco, Zhang, W., NuSTAR Team, Ahnen, M. L., ANTONELLI, Lucio Angelo, 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., Carmona, E., Carosi, A., Chatterjee, A., Clavero, R., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., COVINO, Stefano, Da Vela, P., Dazzi, F., De Angelis, A., De Caneva, G., De Lotto, B., de Oña Wilhelmi, E., Delgado Mendez, C., Di Pierro, F., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., 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., Guberman, D., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kellermann, H., Kodani, K., Konno, Y., Kubo, H., Kushida, J., LA BARBERA, ANTONINO, Lelas, D., Lewandowska, N., Lindfors, E., LOMBARDI, Saverio, Longo, F., López, M., López-Coto, R., López-Oramas, A., Lorenz, E., 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., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Orito, R., Overkemping, A., PAIANO, Simona, Palacio, J., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Paredes-Fortuny, X., Persic, M., Poutanen, J., Prada Moroni, P. G., PRANDINI, ELISA, Puljak, I., Reinthal, R., Rhode, W., Ribó, M., Rico, J., Rodriguez Garcia, J., Saito, T., Saito, K., Satalecka, K., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpää, A., Sitarek, J., Snidaric, I., Sobczynska, D., STAMERRA, Antonio, Steinbring, T., Strzys, M., Takalo, L., Takami, H., TAVECCHIO, Fabrizio, Temnikov, P., Terzić, T., Tescaro, D., Teshima, M., Thaele, J., Torres, D. F., Toyama, T., Treves, A., Verguilov, V., Vovk, I., Will, M., Zanin, R., MAGIC Collaboration, Archer, A., Benbow, W., Bird, R., Biteau, J., Bugaev, V., Cardenzana, J. V., Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Dickinson, H. J., Dumm, J., Eisch, J. D., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H., Fortin, P., Fortson, L., Gerard, L., Gillanders, G. H., Griffin, S., Griffiths, S. T., Grube, J., Gyuk, G., Håkansson, N., Holder, J., Humensky, T. B., Johnson, C. A., Kaaret, P., Kertzman, M., Kieda, D., Krause, M., Krennrich, F., Lang, M. J., Lin, T. T. Y., Maier, G., McArthur, S., McCann, A., Meagher, K., Moriarty, P., Mukherjee, R., Nieto, D., O'Faoláin de Bhróithe, A., Ong, R. A., Park, N., Petry, D., Pohl, M., Popkow, A., Ragan, K., Ratliff, G., Reyes, L. C., Reynolds, P. T., Richards, G. T., Roache, E., Santander, M., Sembroski, G. H., Shahinyan, K., Staszak, D., Telezhinsky, I., Tucci, J. V., Tyler, J., Vassiliev, V. V., Wakely, S. P., Weiner, O. M., Weinstein, A., Wilhelm, A., Williams, D. A., Zitzer, B., VERITAS Collaboration, Vince, O., Fuhrmann, L., Angelakis, E., Karamanavis, V., Myserlis, I., Krichbaum, T. P., Zensus, J. A., Ungerechts, H., Sievers, A., F-Gamma Consortium, The, Bachev, R., Böttcher, M., Chen, W. P., Damljanovic, G., Eswaraiah, C., Güver, T., Hovatta, T., Hughes, Z., Ibryamov, S. I., Joner, M. D., Jordan, B., Jorstad, S. G., Joshi, M., Kataoka, J., Kurtanidze, O. M., Kurtanidze, S. O., Lähteenmäki, A., Latev, G., Lin, H. C., Larionov, V. M., Mokrushina, A. A., Morozova, D. A., Nikolashvili, M. G., RAITERI, Claudia Maria, Ramakrishnan, V., Readhead, A. C. R., Sadun, A. C., Sigua, L. A., Semkov, E. H., Strigachev, A., Tammi, J., Tornikoski, M., Troitskaya, Y. V., Troitsky, I. S., VILLATA, Massimo, Department of Radio Science and Engineering, Aalto-yliopisto, Aalto University, Universitat de Barcelona, Furniss, A., Noda, K., Boggs, S., Chiang, J., Christensen, F., Craig, W., Giommi, P., Hailey, C., Harisson, F., Madejski, G., Nalewajko, K., Perri, M., Stern, D., Urry, M., Verrecchia, F., Zhang, W., Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., J., A. Barrio, Becerra González, J., Bednarek, W., Bernardini, E., Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., 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 Caneva, G., De Lotto, B., De Oña Wilhelmi, E., Delgado Mendez, C., Di Pierro, F., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., 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., Guberman, D., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kellermann, H., Kodani, K., Konno, Y., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Longo, Francesco, López, M., López Coto, R., López Oramas, A., Lorenz, E., 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., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Orito, R., Overkemping, A., Paiano, S., Palacio, J., 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., Ribó, M., Rico, J., Rodriguez Garcia, J., Saito, T., Saito, K., Satalecka, K., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpä, 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., Will, M., Zanin, R., Archer, A., Benbow, W., Bird, R., Biteau, J., Bugaev, V., Cardenzana, J. V., Cerruti, M., Chen, X., Ciupik, L., Connolly, M. P., Cui, W., Dickinson, H. J., Dumm, J., Eisch, J. D., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H., Fortin, P., Fortson, L., Gerard, L., Gillanders, G. H., Griffin, S., Griffiths, S. T., Grube, J., Gyuk, G., Håkansson, N., Holder, J., Humensky, T. B., Johnson, C. A., Kaaret, P., Kertzman, M., Kieda, D., Krause, M., Krennrich, F., Lang, M. J., Lin, T. T. Y., Maier, G., Mcarthur, S., Mccann, A., Meagher, K., Moriarty, P., Mukherjee, R., Nieto, D., O'Faoláin De Bhróithe, A., Ong, R. A., Park, N., Petry, D., Pohl, M., Popkow, A., Ragan, K., Ratliff, G., Reyes, L. C., Reynolds, P. T., Richards, G. T., Roache, E., Santander, M., Sembroski, G. H., Shahinyan, K., Staszak, D., Telezhinsky, I., Tucci, J. V., Tyler, J., Vassiliev, V. V., Wakely, S. P., Weiner, O. M., Weinstein, A., Wilhelm, A., Williams, D. A., Zitzer, B., Vince, O., Fuhrmann, L., Angelakis, E., Karamanavis, V., Myserlis, I., Krichbaum, T. P., Zensus, J. A., Ungerechts, H., Sievers, A., Bachev, R., Böttcher, M., Chen, W. P., Damljanovic, G., Eswaraiah, C., Güver, T., Hovatta, T., Hughes, Z., Ibryamov, S. I., Joner, M. D., Jordan, B., Jorstad, S. G., Joshi, M., Kataoka, J., Kurtanidze, O. M., Kurtanidze, S. O., Lähteenmäki, A., Latev, G., Lin, H. C., Larionov, V. M., Mokrushina, A. A., Morozova, D. A., Nikolashvili, M. G., Raiteri, C. M., Ramakrishnan, V., A. C., R. Readhead, Sadun, A. C., Sigua, L. A., Semkov, E. H., Strigachev, A., Tammi, J., Tornikoski, M., Troitskaya, Y. V., Troitsky, I. S., Villata, M., ~, and 24420530 - Böttcher, Markus

Subjects
galaxie [X-rays], Astrophysics, galaxies BL Lacs, galaxies individual (Markarian 501), X-rays, 01 natural sciences, Luminosity, law.invention, bl lacertae objects, law, MAGIC (telescope), individual: Markarian 501 [galaxies], 010303 astronomy & astrophysics, astro-ph.HE, High Energy Astrophysical Phenomena (astro-ph.HE), BL Lacertae objects: general, galaxies: individual: Markarian 501, X-rays: galaxies, Physics, Astrophysics::Instrumentation and Methods for Astrophysics, fermi-lat, galaxies [X-rays], large-area telescope, BL Lacertae objects: general, galaxies: individual (Markarian 501), X-rays: galaxies, individual (Markarian 501) [galaxies], Spectral energy distribution, Electrónica, Física nuclear, Individual (Markarian 501), Raigs X, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Nuclear and High Energy Physics, BL Lac object, multiwavelength observations, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Optical telescope, Telescope, 0103 physical sciences, crab-nebula, Blazar, galaxies: individual (markarian 501), particle-acceleration, 010308 nuclear & particles physics, general [BL Lacertae objects], galaxies: individual: Markarian 501, Institut für Physik und Astronomie, Astronomy and Astrophysics, gamma-ray emission, Galaxies, Galàxies, x-ray, Space and Planetary Science, ddc:520, magic telescope, log-parabolic spectra, Fermi Gamma-ray Space Telescope
Abstract

We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby BL Lac object was observed in both a quiescent and an elevated state. The broadband campaign includes observations with NuSTAR, MAGIC, VERITAS, the Fermi Large Area Telescope (LAT), Swift X-ray Telescope and UV Optical Telescope, various ground-based optical instruments, including the GASP-WEBT program, as well as radio observations by OVRO, Mets\"ahovi and the F-Gamma consortium. Some of the MAGIC observations were affected by a sand layer from the Saharan desert, and had to be corrected using event-by-event corrections derived with a LIDAR (LIght Detection And Ranging) facility. This is the first time that LIDAR information is used to produce a physics result with Cherenkov Telescope data taken during adverse atmospheric conditions, and hence sets a precedent for the current and future ground-based gamma-ray instruments. The NuSTAR instrument provides unprecedented sensitivity in hard X-rays, showing the source to display a spectral energy distribution between 3 and 79 keV consistent with a log-parabolic spectrum and hard X-ray variability on hour timescales. None (of the four extended NuSTAR observations) shows evidence of the onset of inverse-Compton emission at hard X-ray energies. We apply a single-zone equilibrium synchrotron self-Compton model to five simultaneous broadband spectral energy distributions. We find that the synchrotron self-Compton model can reproduce the observed broadband states through a decrease in the magnetic field strength coinciding with an increase in the luminosity and hardness of the relativistic leptons responsible for the high-energy emission., Comment: Accepted for publication in ApJ

Published
2015
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53. Probing the very high energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes

Author

MAGIC Collaboration, Fermi-LAT Collaboration, Aleksić, Jelena, Biland, Adrian, Hildebrand, Dorothée, Knoetig, Max L., Prandini, Elisa, and Vogler, Patrick

Subjects
active, BL Lacertae objects: general, BL Lacertae objects: individual: PG1553+113, Cosmic background radiation, Gamma-rays: galaxies, Gamma-rays: general [Galaxies], Galaxies: active, Gamma-rays: general
Abstract

Monthly Notices of the Royal Astronomical Society, 450 (4), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711

Published
2015

54. Discovery of Very High Energy γ-Rays from Markarian 180 Triggered by an Optical Outburst

Author

Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Asensio, M., Baixeras, C., Barrio, J. A., Bartelt, M., Bartko, H., Bastieri, Denis, Bednarek, W., Berger, K., Bigongiari, C., Biland, A., Bisesi, E., Bock, R. K., Bordas, P., BOSCH RAMON, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Ciprini, S., Coarasa, J. A., Commichau, S., Contreras, J. L., Cortina, J., Curtef, V., Danielyan, V., Dazzi, Francesco, DE ANGELIS, A., DE LOS REYES, R., DE LOTTO, B., DOMINGO SANTAMARIA, E., Dorner, D., Doro, Michele, Errando, M., Fagiolini, M., Ferenc, D., Fernandez, E., Firpo, R., Flix, J., Fonseca, M. V., Font, L., Fuchs, M., Galante, N., Garczarczyk, M., Gaug, M., Giller, M., Goebel, F., Hakobyan, D., Hayashida, M., Hengstebeck, T., Hohne, D., Hose, J., Hsu, C. C., Isar, P. G., Jacon, P., Kalekin, O., Kosyra, R., Kranich, D., Laatiaoui, M., Laille, A., Lenisa, T., Liebing, P., Lindfors, E., Lombardi, Saverio, Longo, F., Lopez, J., Lopez, M., Lorenz, E., Majumdar, P., Maneva, G., Mannheim, K., Mansutti, O., Mariotti, Mose', Martinez, M., Mase, K., Daniel, Mazin, Merck, C., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Mizobuchi, S., Moralejo, A., Nilsson, K., Ninkovic, J., ONA WILHELMI, E., Orduna, R., Otte, N., Oya, I., Paneque, D., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, Donatella, Pauss, F., Pavel, N., Pegna, R., Persic, M., Peruzzo, Luigi, Piccioli, A., Poller, M., Prandini, Elisa, Raymers, A., Rhode, W., Ribo, M., Rico, J., Riegel, B., Rissi, M., Robert, A., Rugamer, S., Saggion, Antonio, Sanchez, A., Sartori, Paolo, Scalzotto, VILLI MARIO, Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sillanpaa, A., Sobczynska, D., Stamerra, A., Stark, L. S., Takalo, L., Temnikov, P., Tescaro, D., Teshima, M., Tonello, N., Torres, A., Torres, D. F., Turini, N., Vankov, H., Vitale, V., Wagner, R. M., Wibig, T., Wittek, W., Zanin, R., Zapatero, J., J., Albert, E., Aliu, H., Anderhub, P., Antoranz, A., Armada, M., Asensio, C., Baixera, J. A., Barrio, H., Bartko, D., Bastieri, J., Becker, W., Bednarek, K., Berger, C., Bigongiari, A., Biland, E., Bisesi, R. K., Bock, P., Borda, V., Bosch Ramon, T., Bretz, I., Britvitch, M., Camara, E., Carmona, A., Chilingarian, S., Ciprini, J. A., Coarasa, S., Commichau, J. L., Contrera, J., Cortina, V., Curtef, V., Danielyan, F., Dazzi, Angelis, A., Los, R., Lotto, B., E., Domingo Santamar\ia, D., Dorner, M., Doro, M., Errando, M., Fagiolini, D., Ferenc, E., Fernandez, R., Firpo, J., Flix, M. V., Fonseca, L., Font, M., Fuch, N., Galante, M., Garczarczyk, M., Gaug, M., Giller, F., Goebel, D., Hakobyan, M., Hayashida, T., Hengstebeck, D., H\ohne, J., Hose, C. C., Hsu, P., Jacon, O., Kalekin, R., Kosyra, D., Kranich, M., Laatiaoui, A., Laille, T., Lenisa, P., Liebing, E., Lindfor, S., Lombardi, Longo, Francesco, J., Lopez, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, K., Mannheim, O., Mansutti, M., Mariotti, M., Mart\inez, D., Mazin, C., Merck, M., Meucci, M., Meyer, J. M., Miranda, R., Mirzoyan, S., Mizobuchi, A., Moralejo, K., Nilsson, J., Ninkovic, E., O\~na Wilhelmi, R., Ordu\~na, N., Otte, I., Oya, D., Paneque, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R., Pegna, M., Persic, L., Peruzzo, A., Piccioli, M., Poller, E., Prandini, A., Raymer, W., Rhode, M., Ribo, J., Rico, B., Riegel, M., Rissi, A., Robert, S., R\ugamer, A., Saggion, A., Sanchez, P., Sartori, V., Scalzotto, V., Scapin, R., Schmitt, T., Schweizer, M., Shayduk, K., Shinozaki, S. N., Shore, N., Sidro, A., Sillanp\a\a, D., Sobczynska, A., Stamerra, L. S., Stark, L., Takalo, P., Temnikov, D., Tescaro, M., Teshima, N., Tonello, A., Torre, D. F., Torre, N., Turini, H., Vankov, V., Vitale, R. M., Wagner, T., Wibig, W., Wittek, R., Zanin, and J., Zapatero

Subjects
BL Lacertae objects : individual (Markarian 180), High energy, Photon, Astrophysics::High Energy Astrophysical Phenomena, individual (Markarian 180) [BL Lacertae objects], Flux, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Raigs gamma, Observacions astronòmiques, Target of opportunity, gamma rays : observations, BL Lacertae Objects: Individual: Name: Markarian 180 [Galaxies], Cosmic rays, Astrophysics::Galaxy Astrophysics, Galaxies: BL Lacertae Objects: Individual: Name: Markarian 180, Gamma Rays: Observations, Physics, gamma ray astronomy, IMAGING CHERENKOV DETECTOR, Observations [Gamma Rays], Gamma rays, Gamma ray, Astronomy and Astrophysics, Crab Nebula, Space and Planetary Science, Electrónica, Física nuclear, Astrophysics::Earth and Planetary Astrophysics, Electricidad, Astronomical observations, BL Lac object
Abstract

The high-frequency-peaked BL Lacertae object Markarian~180 (Mrk~180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr and very high energy $\gamma$-ray emission was detected with a significance of 5.5 $\sigma$. An integral flux above 200 GeV of $(2.3\pm0.7)\times10^{-11} {cm}^{-2} {s}^{-1}$ was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of $-3.3\pm0.7$ has been determined. No significant flux variation was found., Comment: Accepted by ApJ Letters, minor revisions

Published
2006
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55. Probing the Diffuse Optical-IR Background with TeV Blazars Detected with the MAGIC Telescopes

Author

Prandini, Elisa, Domínguez Díaz, Alberto, Ramazani, Vandad Fallah, Hassan, Tarek, Mazin, Daniel, Moralejo, Abelardo, Nievas Rosillo, Mireia, Vanzo, Gaia, Vazquez Acosta, Monica, Prandini, Elisa, Domínguez Díaz, Alberto, Ramazani, Vandad Fallah, Hassan, Tarek, Mazin, Daniel, Moralejo, Abelardo, Nievas Rosillo, Mireia, Vanzo, Gaia, and Vazquez Acosta, Monica

Abstract

© Frontiers Media SA 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, 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, SP2015-71662-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., Blazars are radio loud quasars whose jet points toward the observer. The observed emission is mostly non-thermal, dominated by the jet emission, and in some cases extends up to the very high energy gamma rays (VHE; E > 100 GeV). To date, more than 60 blazars have been detected at VHE mainly with ground-based imaging atmospheric Cherenkov telescopes (IACTs) such as MAGIC, H.E.S.S., and VERITAS. Energetic photons from a blazar may interact with the diffuse optical and IR background (the extragalactic background light, EBL) leaving an imprint on the blazar energy spectrum. This effect can be used to constrain the EBL, with basic assumptions on the intrinsic energy spectrum. Current generation of IACTs is providing valuable measurements of the EBL density and energy spectrumfromoptical to infrared frequencies. In this contribution, we present the latest results obtained with the data taken with the MAGIC telescopes: using 32 spectra from 12 blazars, the scale factor of the optical density predicted by the EBL model from Dominguez et al. (2011) is constrained to be 0.95 (+0.11, -0.12)_(stat) (+0.16, -0.07)_(sys), where a value of 1 means the perfect match with the model., Ministerio de Economía y Competitividad (MINECO), Centro de Excelencia “Severo Ochoa”, University of Padova, Depto. de Estructura de la Materia, Física Térmica y Electrónica, Fac. de Ciencias Físicas, TRUE, pub

Published
2017

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

Author

Aleksić, Jelena, Ansoldi, Stefano, Antonelli, Lucio A., Antoranz, Pedro, Babić, Ana, Bangale, Priyadarshini, Barrio, Juan A., Becerra González, Josefa, Bednarek, Włodzimierz, Bernardini, Elisa, Biasuzzi, Barbara, Biland, Adrian, Blanch, Oscar, Bonnefoy, Simon, Bonnoli, Giacomo, Borracci, F., Bretz, Thomas, Carmona, Emiliano, Carosi, Alessandro, Colin, Pierre, Colombo, E., Contreras, José L., Covino, Stefano, Da Vela, Paolo, Dazzi, Francesco, De Angelis, Alessandro, De Caneva, Gessica, De Lotto, Barbara, de Ona Wilhelmi, Emma, Delgado Mendez, C., Di Pierro, Federico, Dominis Prester, D., Dorner, Daniela, Doro, Michele, Einecke, Sabrina, Eisenacher, Dorit, Elsäesser, Dominik, Fernández Barral, Alba, Fidalgo, David Carreto, Fonseca Gonzalez, María Victoria, Font, Lluís, Frantzen, Katharina, Fruck, Christian, García Łópez, Ramón J., Garczarczyk, Markus, Garrido Terrats, D., Gaug, Markus, Godinović, Nikola, González Muñoz, A., Gozzini, Sara R., Hadasch, Daniela, Hanabata, Yoshitaka, Hayashida, Masaaki, Hose, Juergen, Hrupec, Dario, Idec, W., Kadenius, Ville, Kellermann, Hanna, Knoetig, Max L., Kodani, Kazuhito, Konno, Yusuke, Krause, Julian, Kubo, Hidetoshi, Kushida, J., La Barbera, Antonino, Lelas, Damir, Lewandowska, Natalia, Lindfors, Elina, Lombardi, Saverio, Longo, Francesco, López Moya, Marcos, López-Coto, Rubén, López-Oramas, Alicia, Lorenz, Eckhart, Lozano, I., Makariev, M., Mallot, K., Maneva, Galina, Mannheim, Karl, Maraschi, Laura, Maríotti, Mosé, Martínez, Manel I., Mazin, Daniel, Menzel, Uta, Miranda, José M., Mirzoyan, Razmik, Moralejo, Abelardo, Munar-Adrover, Pere, Nakajima, Daisuke, Neustroev, Vitaly, Niedźwiecki, Andrzej, Nievas Rosillo, Mireia, Nilsson, Kari, Nishijima, Kyoshi, Noda, Koji, Orito, Reiko, Overkemping, A.K., Paiano, Simona, Palatiello, Michele, Paneque, David, Paoletti, Riccardo, Paredes, Josep M., Paredes-Fortuny, Xavier, Persic, Massimo, Poutanen, Juri, Prada Moroni, Pier G., Prandini, Elisa, Puljak, Ivica, Reinthal, Riho, Rhode, Wolfgang, Ribó, Marc, Rico, Javier, Rodriguez Garcia, J., Saito, Takayuki Y., Saito, Koji, Satalecka, Konstancja, Scalzotto, Villi, Scapin, Valeria, Schultz, Cornelia, Schweizer, Thomas, Shore, Steven N., Sillanpää, Aimo K., Sitarek, Julian, Šnidarić, I., Sobczyńska, Dorota, Stamerra, Antonio, Steinbring, T., Strzys, Marcel C., Takalo, Leo, Takami, Hajime, Tavecchio, Fabrizio, Terzić, Tomislav, Tescaro, Diego, Teshima, Masahiro, Thaele, Julia, Torres, Diego F., Toyama, Takeshi, Treves, Aldo, Vogler, Patrick, Will, Martin, Zanin, Roberta, Berger, Karsten, Buson, Sara, D'Ammando, Filippo, Gasparrini, Dario, Hovatta, Talvikki, Max-Moerbeck, Walter, and Readhead, Anthony C.S.

Subjects
Radiation mechanisms: non-thermal, Galaxies: jets, BL Lacertae objects: individual: 1ES 0806+524, Galaxies: active, non-thermal, Gamma-rays: galaxies [Radiation mechanisms], Gamma-rays: galaxies
Abstract

Monthly Notices of the Royal Astronomical Society, 451 (1), ISSN:0035-8711, ISSN:1365-2966, ISSN:1365-8711

Published
2015
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57. The VHE gamma-ray periodicity of PG1553+113: a possible probe of a system of binary supermassive black hole

Author

Prandini, Elisa, primary, Stamerra, Antonio, additional, Da Vela, Paolo, additional, Becerra Gonzalez, Josefa, additional, Hughes, Gareth, additional, Lindfors, Elina, additional, Barres de Almeida, Ulisses, additional, Covino, Stefano, additional, Bonnoli, Giacomo, additional, Antonelli, A., additional, Paiano, Simona, additional, and Sandrinelli, Angela, additional

Published
2016
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61. Flat Spectrum Radio Quasars through the MAGIC glasses

Author

Becerra Gonzalez, Josefa, primary, Lindfors, Elina, additional, Prandini, Elisa, additional, Satalecka, Konstancja, additional, Sitarek, Julian, additional, De Caneva, Gessica, additional, Fallah Ramazani, Vandad, additional, Tavecchio, Fabrizio, additional, McEnery, Julie, additional, Hovatta, Talvikki, additional, Tornikoski, Merja, additional, Lahteenmaki, Anne, additional, Jorstad, Svetlana G., additional, and Marscher, Alan, additional

Published
2016
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62. Bruno Benedetto Rossi

Author

Busetto, Giovanni, Peruzzi, Giulio, Prandini, Elisa, Talas, Sofia, and Tibaldo, Luigi

Subjects
Bruno Benedetto Rossi, Raggi cosmici, Storia della fisica
Published
2012

63. Very high energy gamma-radiation from the radio quasar 4C 21.35

Author

Becerra González, Josefa, Maraschi, Laura, Mazin, Daniel, Prandini, Elisa, Saito, Koji, Sitarek, Julian, Stamerra, Antonio, Tavecchio, Fabrizio, Terzić, Tomislav, Treves, Aldo, Tuffs, Richard J., and Popescu, Cristina C.

Subjects
4C 21.35, PKS 1222+216, MAGIC, gamma-rays
Abstract

A very high energy (VHE) γ-radiation was detected from a flat spectrum radio quasar (FSRQ) 4C 21.35 (PKS1222+21) by MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes on June 17 th 2010. 4C 21.35 is only the 3rd FSRQ detected in VHE γ-rays. With its hard spectrum (Γ = 2.72±0.34) with no apparent cut-off at energies below 130 GeV and an extremely fast variation of flux (doubling in 8.6+1.1−0.9 minutes), this detection poses a challenge to existing models of VHE γ-radiation from FSRQs. The most important results of observations performed by MAGIC telescopes are presented here, as well as some possible explanations of those results.

Published
2012

64. Camera calibration strategy of the SST-1M prototype of the Cherenokov Telescope Array

Author

Prandini, Elisa, Toscano, Simona, Prandini, Elisa, and Toscano, Simona

Abstract

The SST-1M telescope is one of the prototypes under construction proposed to be part of the future Cherenkov Telescope Array. It uses a standard Davis-Cotton design for the optics and telescope structure, with a dish diameter of 4 meters and a large field-of-view of 9 degrees. The innovative camera design is composed of a photo-detection plane with 1296 pixels including entrance window, light concentrators, Silicon Photomultipliers (SiPMs), and pre-amplifier stages together with a fully digital readout and trigger electronics, DigiCam. In this contribution we give a general description of the analysis chain designed for the SST-1M prototype. In particular we focus on the calibration strategy used to convert the SiPM signals registered by DigiCam to the quantities needed for Cherenkov image analysis. The calibration is based on an online feedback system to stabilize the gain of the SiPMs, as well as dedicated events (dark count, pedestal, and light flasher events) to be taken during the normal operation of the prototype., 0, SCOPUS: cp.p, info:eu-repo/semantics/published

Published
2015

65. Magic Constraints on γ-ray Emission from Cygnus X-3

Author

Aleksic, J, Antonelli, La, Antoranz, P, Backes, M, Baixeras, C, Barrio, Ja, Bastieri, Denis, Gonzalez, Jb, Bednarek, W, Berdyugin, A, Berger, K, Bernardini, E, Biland, A, Blanch, O, Bock, Rk, Boller, A, Bonnoli, G, Bordas, P, Tridon, Db, BOSCH RAMON, V, Bose, D, Braun, I, Bretz, T, Britzger, D, Camara, M, Carmona, E, Carosi, A, Colin, P, Contreras, Jl, Cortina, J, Costado, Mt, Covino, S, Dazzi, F, DE ANGELIS, A, DEL POZO EDC, DE LOTTO, B, DE MARIA, M, DE SABATA, F, Mendez, Cd, Doert, M, Dominguez, A, Prester, Dd, Dorner, D, Doro, Michele, Elsaesser, D, Errando, M, Ferenc, D, Fonseca, Mv, Font, L, Lopez, Rjg, Garczarczyk, M, Gaug, M, Godinovic, N, Goebel, F, Hadasch, D, Herrero, A, Hildebrand, D, HOHNE MONCH, D, Hose, J, Hrupec, D, Hsu, Cc, Jogler, T, Klepser, S, Krahenbuhl, T, Kranich, D, LA BARBERA, A, Laille, A, Leonardo, E, Lindfors, E, Lombardi, S, Longo, F, Lopez, M, Lorenz, E, Majumdar, P, Maneva, G, Mankuzhiyil, N, Mannheim, K, Maraschi, L, Mariotti, Mose', Martinez, M, Mazin, D, Meucci, M, Miranda, Jm, Mirzoyan, R, Miyamoto, H, Moldon, J, Moles, M, Moralejo, A, Nieto, D, Nilsson, K, Ninkovic, J, Orito, R, Oya, I, Paiano, S, Paoletti, R, Paredes, Jm, Partini, S, Pasanen, M, Pascoli, Donatella, Pauss, F, Pegna, Rg, PEREZ TORRES MA, Persic, M, Peruzzo, L, Prada, F, Prandini, Elisa, Puchades, N, Puljak, I, Reichardt, I, Rhode, W, Ribo, M, Rico, J, Rissi, M, Rugamer, S, Saggion, Antonio, Saito, K, Saito, Ty, Salvati, M, SANCHEZ CONDE, M, Satalecka, K, Scalzotto, VILLI MARIO, Scapin, V, Schultz, C, Schweizer, T, Shayduk, M, Shore, Sn, SIERPOWSKA BARTOSIK, A, Sillanpaa, A, Sitarek, J, Sobczynska, D, Spanier, F, Spiro, S, Stamerra, A, Steinke, B, Struebig, Jc, Suric, T, Takalo, L, Tavecchio, F, Temnikov, P, Terzic, T, Tescaro, D, Teshima, M, Torres, Df, Vankov, H, Wagner, Rm, Weitzel, Q, Zabalza, V, Zandanel, F, Zanin, R, Bulgarelli, A, MAX MOERBECK, W, Piano, G, Pooley, G, Readhead, Acs, Richards, Jl, Sabatini, S, Striani, E, Tavani, M, Trushkin, S., J., Aleksic, L. A., Antonelli, P., Antoranz, M., Backe, C., Baixera, J. A., Barrio, D., Bastieri, J. B., Gonzalez, W., Bednarek, A., Berdyugin, K., Berger, E., Bernardini, A., Biland, O., Blanch, R. K., Bock, A., Boller, G., Bonnoli, P., Borda, D. B., Tridon, V., Bosch Ramon, D., Bose, I., Braun, T., Bretz, D., Britzger, M., Camara, E., Carmona, A., Carosi, P., Colin, J. L., Contrera, J., Cortina, M. T., Costado, S., Covino, F., Dazzi, A. D., Angeli, E. D. C., Del Pozo, B. D., Lotto, M. D., Maria, F. D., Sabata, C. D., Mendez, M., Doert, A., Dominguez, D. D., Prester, D., Dorner, M., Doro, D., Elsaesser, M., Errando, D., Ferenc, M. V., Fonseca, L., Font, R. J. G., Lopez, M., Garczarczyk, M., Gaug, N., Godinovic, F., Goebel, D., Hadasch, A., Herrero, D., Hildebrand, D., Hohne Monch, J., Hose, D., Hrupec, C. C., Hsu, T., Jogler, S., Klepser, T., Krahenbuhl, D., Kranich, A. L., Barbera, A., Laille, E., Leonardo, E., Lindfor, S., Lombardi, Longo, Francesco, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, N., Mankuzhiyil, K., Mannheim, L., Maraschi, M., Mariotti, M., Martinez, D., Mazin, M., Meucci, J. M., Miranda, R., Mirzoyan, H., Miyamoto, J., Moldon, M., Mole, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, R., Orito, I., Oya, S., Paiano, R., Paoletti, J. M., Parede, S., Partini, M., Pasanen, D., Pascoli, F., Pau, R. G., Pegna, M. A., Perez Torre, M., Persic, L., Peruzzo, F., Prada, E., Prandini, N., Puchade, I., Puljak, I., Reichardt, W., Rhode, M., Ribo, J., Rico, M., Rissi, S., Rugamer, A., Saggion, K., Saito, T. Y., Saito, M., Salvati, M., Sanchez Conde, K., Satalecka, V., Scalzotto, V., Scapin, C., Schultz, T., Schweizer, M., Shayduk, S. N., Shore, A., Sierpowska Bartosik, A., Sillanpaa, J., Sitarek, D., Sobczynska, F., Spanier, S., Spiro, A., Stamerra, B., Steinke, J. C., Struebig, T., Suric, L., Takalo, F., Tavecchio, P., Temnikov, T., Terzic, D., Tescaro, M., Teshima, D. F., Torre, H., Vankov, R. M., Wagner, Q., Weitzel, V., Zabalza, F., Zandanel, R., Zanin, A., Bulgarelli, W., Max Moerbeck, G., Piano, G., Pooley, A. C. S., Readhead, J. L., Richard, S., Sabatini, E., Striani, M., Tavani, and S., Trushkin

Subjects
Photon, HIGH-ENERGY EMISSION, MICROQUASAR GRS 1915+105, X-RAY, RELATIVISTIC JET, CYG X-3, RADIO OUTBURST, CRAB-NEBULA, BINARY, TELESCOPE, PULSAR, Astrophysics, 01 natural sciences, law.invention, Raigs gamma, law, Observacions astronòmiques, 010303 astronomy & astrophysics, Estels binaris de raigs X, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Very High Energy Gamma-ray Astronomy, MAGIC telescope, Black Holes, Gamma ray, X-ray binaries, Electrónica, Física nuclear, Radio frequency, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Astronomical observations, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Compact star, Radiation, gamma ray astronomy, Cosmic rays, IMAGING CHERENKOV DETECTOR, Telescope, 0103 physical sciences, acceleration of particles, binaries: general, gamma rays: observations, X-rays: bina- ries — X-rays: individual (Cygnus X-3), Cherenkov radiation, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Gamma rays, Magic (programming), Astronomy, Astronomy and Astrophysics, Space and Planetary Science
Abstract

Cygnus X-3 is a microquasar consisting of an accreting compact object orbiting around a Wolf-Rayet star. It has been detected at radio frequencies and up to high-energy gamma rays (above 100 MeV). However, many models also predict a very high energy (VHE) emission (above hundreds of GeV) when the source displays relativistic persistent jets or transient ejections. Therefore, detecting such emission would improve the understanding of the jet physics. The imaging atmospheric Cherenkov telescope MAGIC observed Cygnus X-3 for about 70 hours between 2006 March and 2009 August in different X-ray/radio spectral states and also during a period of enhanced gamma-ray emission. MAGIC found no evidence for a VHE signal from the direction of the microquasar. An upper limit to the integral flux for energies higher than 250 GeV has been set to 2.2 x 10-12 photons cm-2 s-1 (95% confidence level). This is the best limit so far to the VHE emission from this source. The non-detection of a VHE signal during the period of activity in the high-energy band sheds light on the location of the possible VHE radiation favoring the emission from the innermost region of the jets, where absorption is significant. The current and future generations of Cherenkov telescopes may detect a signal under precise spectral conditions., 14 pages, 11 figures, This manuscript has been accepted by ApJ (2010)

Published
2010
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66. Very high energy gamma-ray radiation from the stellar mass black hole binary Cygnus X-1

Author

Albert, J., Aliu, E., Anderhub, H., Antoranz, P., Armada, A., Baixeras, C., Barrio, J. A., Bartko, H., Bastieri, Denis, Becker, J. K., Bednarek, W., Berger, K., Bigongiari, Ciro, Biland, A., Bock, R. K., Bordas, P., Bosch Ramon, V., Bretz, T., Britvitch, I., Camara, M., Carmona, E., Chilingarian, A., Coarasa, J. A., Commichau, S., Contreras, J. L., Cortina, J., Costado, M. T., Curtef, V., Danielyan, V., Dazzi, Francesco, De Angelis, A., Delgado, C., de los Reyes, R., De Lotto, B., Domingo Santamaría, E., Dorner, D., Doro, Michele, Errando, M., Fagiolini, M., Ferenc, D., Fernández, E., Firpo, R., Flix, J., Fonseca, M. V., Font, L., Fuchs, M., Galante, N., García López, R. J., Garczarczyk, M., Gaug, M., Giller, M., Goebel, F., Hakobyan, D., Hayashida, M., Hengstebeck, T., Herrero, A., Höhne, D., Hose, J., Hsu, C. C., Jacon, P., Jogler, T., Kosyra, R., Kranich, D., Kritzer, R., Laille, A., Lindfors, E., Lombardi, Saverio, Longo, F., López, J., López, M., Lorenz, E., Majumdar, P., Maneva, G., Mannheim, K., Mansutti, O., Mariotti, Mose', Martínez, M., Mazin, D., Merck, C., Meucci, M., Meyer, M., Miranda, J. M., Mirzoyan, R., Mizobuchi, S., Moralejo, A., Nieto, D., Nilsson, K., Ninkovic, J., Oña Wilhelmi, E., Otte, N., Oya, I., Panniello, M., Paoletti, R., Paredes, J. M., Pasanen, M., Pascoli, Donatella, Pauss, F., Pegna, R., Persic, M., Peruzzo, Luigi, Piccioli, A., Prandini, Elisa, Puchades, N., Raymers, A., Rhode, W., Ribó, M., Rico, J., Rissi, M., Robert, A., Rügamer, S., Saggion, Antonio, Saito, T., Sánchez, A., Sartori, Paolo, Scalzotto, VILLI MARIO, Scapin, V., Schmitt, R., Schweizer, T., Shayduk, M., Shinozaki, K., Shore, S. N., Sidro, N., Sillanpää, A., Sobczynska, D., Stamerra, A., Stark, L. S., Takalo, L., Temnikov, P., Tescaro, D., Teshima, M., Torres, D. F., Turini, N., Vankov, H., Vitale, V., Wagner, R. M., Wibig, T., Wittek, W., Zandanel, F., Zanin, R., Zapatero, J., J., Albert, E., Aliu, H., Anderhub, P., Antoranz, A., Armada, C., Baixera, J. A., Barrio, H., Bartko, D., Bastieri, J. K., Becker, W., Bednarek, K., Berger, C., Bigongiari, A., Biland, R. K., Bock, P., Borda, V., Bosch Ramon, T., Bretz, I., Britvitch, M., Camara, E., Carmona, A., Chilingarian, J. A., Coarasa, S., Commichau, J. L., Contrera, J., Cortina, M. T., Costado, V., Curtef, V., Danielyan, F., Dazzi, A. D., Angeli, C., Delgado, R., Reye, B. D., Lotto, E., Domingo SantamariA, D., Dorner, M., Doro, M., Errando, M., Fagiolini, D., Ferenc, E., Fernandez, R., Firpo, J., Flix, M. V., Fonseca, L., Font, M., Fuch, N., Galante, R. J., Garcia Lopez, M., Garczarczyk, M., Gaug, M., Giller, F., Goebel, D., Hakobyan, M., Hayashida, T., Hengstebeck, A., Herrero, D., Hohne, J., Hose, C. C., Hsu, P., Jacon, T., Jogler, R., Kosyra, D., Kranich, R., Kritzer, A., Laille, E., Lindfor, S., Lombardi, Longo, Francesco, J., Lopez, M., Lopez, E., Lorenz, P., Majumdar, G., Maneva, K., Mannheim, O., Mansutti, M., Mariotti, M., Martinez, D., Mazin, C., Merck, M., Meucci, M., Meyer, J. M., Miranda, R., Mirzoyan, S., Mizobuchi, A., Moralejo, D., Nieto, K., Nilsson, J., Ninkovic, E., Ona Wilhelmi, N., Otte, I., Oya, M., Panniello, R., Paoletti, J. M., Parede, M., Pasanen, D., Pascoli, F., Pau, R., Pegna, M., Persic, L., Peruzzo, A., Piccioli, E., Prandini, N., Puchade, A., Raymer, W., Rhode, M., Ribo, J., Rico, M., Rissi, A., Robert, S., Rugamer, A., Saggion, T., Saito, A., Sanchez, P., Sartori, V., Scalzotto, V., Scapin, R., Schmitt, T., Schweizer, M., Shayduk, K., Shinozaki, S. N., Shore, N., Sidro, A., Sillanpaa, D., Sobczynska, A., Stamerra, L. S., Stark, L., Takalo, P., Temnikov, D., Tescaro, M., Teshima, D. F., Torre, N., Turini, H., Vankov, V., Vitale, R. M., Wagner, T., Wibig, W., Wittek, F., Zandanel, R., Zanin, and J., Zapatero

Subjects
Black Holes, Stellar mass, Flux, FOS: Physical sciences, Astrophysics, law.invention, X-ray astronomy, law, Gamma ray astronomy, Astronomia de raigs gamma, Physics, Nebula, Acceleradors de partícules, Astrophysics (astro-ph), Gamma ray, Sigma, Astronomy and Astrophysics, Black Hole, Very High Energy Gamma-ray Astronomy, MAGIC telescope, Particle accelerators, Astronomia de raigs X, Black hole, Crab Nebula, Space and Planetary Science, Electrónica, Física nuclear, Electricidad, Flare
Abstract

We report on the results from the observations in very high energy band (VHE, E_gamma > 100 GeV) of the black hole X-ray binary (BHXB) Cygnus X-1. The observations were performed with the MAGIC telescope, for a total of 40 hours during 26 nights, spanning the period between June and November 2006. Searches for steady gamma-ray signals yielded no positive result and upper limits to the integral flux ranging between 1 and 2% of the Crab nebula flux, depending on the energy, have been established. We also analyzed each observation night independently, obtaining evidence of gamma-ray signals at the 4.0 standard deviations (sigma) significance level (3.2 sigma after trial correction) for 154 minutes effective on-time (EOT) on September 24 between 20h58 and 23h41 UTC, coinciding with an X-ray flare seen by RXTE, Swift and INTEGRAL. A search for faster-varying signals within a night resulted in an excess with a significance of 4.9 sigma (4.1 sigma after trial correction) for 79 minutes EOT between 22h17 and 23h41 UTC. The measured excess is compatible with a point-like source at the position of Cygnus X-1, and excludes the nearby radio nebula powered by its relativistic jet. The differential energy spectrum is well fitted by an unbroken power-law described by dN/(dA dt dE) = (2.3+- 0.6) x 10^{-12} (E/1 TeV)^{-3.2 +- 0.6}. This is the first experimental evidence of VHE emission from a stellar-mass black hole, and therefore from a confirmed accreting X-ray binary., 4 ApJL-formatted pages, 4 figures. Revised version accepted for publication at ApJL (26-06-2007)

Published
2007

69. Suzaku and Multi-Wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007

Author

Seta, Hiromi, primary, Isobe, Naoki, additional, Tashiro, Makoto S., additional, Yaji, Yuichi, additional, Arai, Akira, additional, Fukuhara, Masayuki, additional, Kohno, Kotaro, additional, Nakanishi, Kouichiro, additional, Sasada, Mahito, additional, Shimajiri, Yoshito, additional, Tosaki, Tomoka, additional, Uemura, Makoto, additional, Anderhub, Hans, additional, Antonelli, Lucio Angelo, additional, Antoranz, Pedro, additional, Backes, Michael, additional, Baixeras, Carmen, additional, Balestra, Silvia, additional, Barrio, Juan Abel, additional, Bastieri, Denis, additional, González, Josefa Becerra, additional, Becker, Julia K., additional, Bednarek, Wodzimierz, additional, Berger, Karsten, additional, Bernardini, Elisa, additional, Biland, Adrian, additional, Bock, Rudolf K., additional, Bonnoli, Giacomo, additional, Bordas, Pol, additional, Tridon, Daniela Borla, additional, Bosch-Ramon, Valenti, additional, Bose, Debanjan, additional, Braun, Isabel, additional, Bretz, Thomas, additional, Britvitch, Ilia, additional, Camara, Miguel, additional, Carmona, Emiliano, additional, Commichau, Sebastian, additional, Contreras, José Luis, additional, Cortina, Juan, additional, Dios, Ma Teresa Costado, additional, Covino, Stefano, additional, Curtef, Valentin, additional, Dazzi, Francesco, additional, DeAngelis, Alessandro, additional, DelPozo, Elsa De Cea, additional, DelosReyes, Raquel, additional, DeLotto, Barbara, additional, DeMaria, Michela, additional, DeSabata, Francesco, additional, Méndez, Carlos Delgado, additional, Domínguez, Alberto, additional, Dorner, Daniela, additional, Doro, Michele, additional, Elsaesser, Dominik, additional, Errando, Manel, additional, Ferenc, Daniela, additional, Fernández, Enrique, additional, Firpo, Roger, additional, Fonseca, Maria Victoria, additional, Font, Lluis, additional, Galante, Nicola, additional, GarcíaLópez, Ramon J., additional, Garczarczyk, Markus, additional, Gaug, Markus, additional, Goebel, Florian, additional, Hadasch, Daniela, additional, Hayashida, Masaaki, additional, Herrero, Artemio, additional, Hildebrand, Dorothée, additional, Höhne-Mönch, Daniel, additional, Hose, Jürgen, additional, Hsu, Ching Cheng, additional, Jogler, Tobias, additional, Kranich, Daniel, additional, Barbera, Antonio La, additional, Laille, Alvin, additional, Leonardo, Elvira, additional, Lindfors, Elina, additional, Lombardi, Saverio, additional, Longo, Francesco, additional, López, Donatella, additional, Lorenz, Eckart, additional, Majumdar, Pratik, additional, Maneva, Galina, additional, Mankuzhiyil, Nijil, additional, Mannheim, Karl, additional, Maraschi, Laura, additional, Mariotti, Mosé, additional, Martínez, Manel, additional, Mazin, Daniel, additional, Meucci, Mario, additional, Meyer, Markus, additional, Miranda, Jose Miguel, additional, Mirzoyan, Razmick, additional, Miyamoto, Hiroko, additional, Moldón, Javier, additional, Moles, Mariano, additional, Moralejo, Abelardo, additional, Nieto, Daniel, additional, Nilsson, Kari, additional, Ninkovic, Jelena, additional, Otte, Nepomuk, additional, Oya, Igor, additional, Paoletti, Riccardo, additional, Paredes, Josep M., additional, Pasanen, Mikko, additional, Pascoli, Donatella, additional, Pauss, Felicitas, additional, Pegna, Raffaello G., additional, Perez-Torres, Miguel A., additional, Persic, Massimo, additional, Peruzzo, Luigi, additional, Prada, Francisco, additional, Prandini, Elisa, additional, Puchades, Neus, additional, Reichardt, Ignasi, additional, Rhode, Wolfgang, additional, Ribó, Marc, additional, Rico, Javier, additional, Rissi, Michael, additional, Robert, Arnau, additional, Rügamer, Stefan, additional, Saggion, Antonio, additional, Saito, Takayuki Y., additional, Salvati, Marco, additional, Sánchez-Conde, Miguel, additional, Satalecka, Konstancja, additional, Scalzotto, Villi, additional, Scapin, Valeria, additional, Schweizer, Thomas, additional, Shayduk, Maxim, additional, Shore, Steve N., additional, Sidro, Nuria, additional, Sierpowska-Bartosik, Agnieszka, additional, Sillanpää, Aimo, additional, Sitarek, Julian, additional, Sobczynska, Dorota, additional, Spanier, Felix, additional, Stamerra, Antonio, additional, Schneebeli, Luisa Sabrina Stark, additional, Takalo, Leo, additional, Tavecchio, Fabrizio, additional, Temnikov, Petar, additional, Tescaro, Diego, additional, Teshima, Masahiro, additional, Tluczykont, Martin, additional, Torres, Diego F., additional, Turini, Nicola, additional, Vankov, Hristofor, additional, Wagner, Robert M., additional, Wittek, Wolfgang, additional, Zabalza, Victor, additional, Zandanel, Fabio, additional, Zanin, Roberta, additional, and Zapatero, Jordi, additional

Published
2009
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70. Very high energy γ-radiation from the radio quasar 4C 21.35.

Author

González, Josefa Becerra, Maraschi, Laura, Mazin, Daniel, Prandini, Elisa, Saito, Koji, Sitarek, Julian, Stamerra, Antonio, Tavecchio, Fabrizio, Terzić, Tomislav, and Treves, Aldo

Abstract

A very high energy (VHE) γ-radiation was detected from a flat spectrum radio quasar (FSRQ) 4C 21.35 (PKS1222+21) by MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes on June 17th 2010. 4C 21.35 is only the 3rd FSRQ detected in VHE γ-rays. With its hard spectrum (Γ = 2.72±0.34) with no apparent cut-off at energies below 130 GeV and an extremely fast variation of flux (doubling in 8.6+1.1−0.9 minutes), this detection poses a challenge to existing models of VHE γ-radiation from FSRQs. The most important results of observations performed by MAGIC telescopes are presented here, as well as some possible explanations of those results. [ABSTRACT FROM PUBLISHER]

Published
2011
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71. Suzaku and Multi-Wavelength Observations of OJ 287 during the Periodic Optical Outburst in 2007

Author

Seta, Hiromi, Isobe, Naoki, Tashiro, Makoto S., Yaji, Yuichi, Arai, Akira, Fukuhara, Masayuki, Kohno, Kotaro, Nakanishi, Kouichiro, Sasada, Mahito, Shimajiri, Yoshito, Tosaki, Tomoka, Uemura, Makoto, Anderhub, Hans, Antonelli, Lucio Angelo, Antoranz, Pedro, Backes, Michael, Baixeras, Carmen, Balestra, Silvia, Abel Barrio, Juan, Bastieri, Denis, Becerra Gonzalez, Josefa, Becker, Julia K., Bednarek, Wlodzimierz, Berger, Karsten, Bernardini, Elisa, Biland, Adrian, Bock, Rudolf K., Bonnoli, Giacomo, Bordas, Pol, Tridon, Daniela Borla, Bosch-Ramon, Valenti, Bose, Debanjan, Braun, Isabel, Bretz, Thomas, Britvitch, Ilia, Camara, Miguel, Carmona, Emiliano, Commichau, Sebastian, Luis Contreras, Jose, Cortina, Juan, Costado Dios, Ma Teresa, Covino, Stefano, Curtef, Valentin, Dazzi, Francesco, Angelis, Alessandro, Cea Del Pozo, Elsa, Los Reyes, Raquel, Lotto, Barbara, Maria, Michela, Sabata, Francesco, Delgado Mendez, Carlos, Dominguez, Alberto, Dorner, Daniela, Doro, Michele, Elsaesser, Dominik, Errando, Manel, Ferenc, Daniela, Fernandez, Enrique, Firpo, Roger, Victoria Fonseca, Maria, Font, Lluis, Galante, Nicola, Garcia Lopez, Ramon J., Garczarczyk, Markus, Gaug, Markus, Goebel, Florian, Hadasch, Daniela, Hayashida, Masaaki, Herrero, Artemio, Hildebrand, Dorothee, Hoehne-Moench, Daniel, Hose, Juergen, Hsu, Ching Cheng, Jogler, Tobias, Kranich, Daniel, La Barbera, Antonio, Laille, Alvin, Leonardo, Elvira, Lindfors, Elina, Lombardi, Saverio, Longo, Francesco, Lopez, Donatella, Lorenz, Eckart, Majumdar, Pratik, Maneva, Galina, Mankuzhiyil, Nijil, Mannheim, Karl, Maraschi, Laura, Mariotti, Mose, Martinez, Manel, Mazin, Daniel, Meucci, Mario, Meyer, Markus, Miguel Miranda, Jose, Mirzoyan, Razmick, Miyamoto, Hiroko, Moldon, Javier, Moles, Mariano, Moralejo, Abelardo, Daniel Nieto, Nilsson, Kari, Ninkovic, Jelena, Otte, Nepomuk, Oya, Igor, Paoletti, Riccardo, Paredes, Josep M., Pasanen, Mikko, Pascoli, Donatella, Pauss, Felicitas, Pegna, Raffaello G., Perez-Torres, Miguel A., Persic, Massimo, Peruzzo, Luigi, Prada, Francisco, Prandini, Elisa, Puchades, Neus, Reichardt, Ignasi, Rhode, Wolfgang, Ribo, Marc, Rico, Javier, Rissi, Michael, Robert, Arnau, Ruegamer, Stefan, Saggion, Antonio, Saito, Takayuki Y., Salvati, Marco, Sanchez-Conde, Miguel, Satalecka, Konstancja, Scalzotto, Villi, Scapin, Valeria, Schweizer, Thomas, Shayduk, Maxim, Shore, Steve N., Sidro, Nuria, Sierpowska-Bartosik, Agnieszka, Sillanpaa, Aimo, Sitarek, Julian, Sobczynska, Dorota, Spanier, Felix, Stamerra, Antonio, Schneebeli, Luisa Sabrina Stark, Takalo, Leo, Tavecchio, Fabrizio, Temnikov, Petar, Tescaro, Diego, Teshima, Masahiro, Tluczykont, Martin, Torres, Diego F., Turini, Nicola, Vankov, Hristofor, Wagner, Robert M., Wittek, Wolfgang, Zabalza, Victor, Zandanel, Fabio, Zanin, Roberta, Zapatero, Jordi, and Magic, Collaboration

72. An innovative silicon photomultiplier digitizing camera for gamma-ray astronomy

Author

M. Heller, E. jr Schioppa, A. Porcelli, I. Troyano Pujadas, K. Ziȩtara, D. della Volpe, T. Montaruli, F. Cadoux, Y. Favre, J. A. Aguilar, A. Christov, E. Prandini, P. Rajda, M. Rameez, W. Bilnik, J. Błocki, L. Bogacz, J. Borkowski, T. Bulik, A. Frankowski, M. Grudzińska, B. Idźkowski, M. Jamrozy, M. Janiak, J. Kasperek, K. Lalik, E. Lyard, E. Mach, D. Mandat, A. Marszałek, L. D. Medina Miranda, J. Michałowski, R. Moderski, A. Neronov, J. Niemiec, M. Ostrowski, P. Paśko, M. Pech, P. Schovanek, K. Seweryn, V. Sliusar, K. Skowron, Ł. Stawarz, M. Stodulska, M. Stodulski, R. Walter, M. Wiȩcek, A. Zagdański, Heller, Matthieu, Schioppa, Enrico junior, Porcelli, Alessio, Troyano Pujadas, Isaac, Zietara, Krzysztof, Della Volpe, Domenico, Montaruli, Teresa, Cadoux, Franck, Favre, Yannick, Antonio Aguilar Sanchez, Juan, Christov, Asen, Prandini, Elisa, Rajda, Pawel, Rameez, Mohamed, Blinik, Woijciech, Blocki, Jacek, Bogacz, Leszek, Borkowski, Jurek, Bulik, Tomasz, Frankowski, Adam, Grudzinska, Mira, Idzkowski, Bartosz, Jamrozy, Mateusz, Janiak, Mateusz, Kasperek, Jerzy, Lalik, Krzysztof, Lyard, Etienne, Mach, Emil, Mandat, Dusan, Marszalek, Adrian, David Medina Miranda, Lui, Michalowski, Jerzy, Neronov, Andrii, Niemiec, Jacek, Ostrowski, Michal, Pasko, Pawel, Pech, Miroslav, Schovanek, Petr, Seweryn, Karol, Sliusar, Vitalii, Skowron, Krzysztof, Stawarz, Lukasz, Stodulska, Magdalena, Stodulski, Marek, Walter, Roland, Wiecek, Marek, Zagdanski, Aleksander, Schioppa, Enrico Junior, Aguilar, J. A., and Miranda, David

Subjects
business.product_category, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Computer science, Segmented mirror, FOS: Physical sciences, Photodetector, ddc:500.2, 7. Clean energy, 01 natural sciences, law.invention, Telescope, Silicon photomultiplier, law, 0103 physical sciences, Engineering (miscellaneous), Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Digital camera, 010308 nuclear & particles physics, business.industry, Instrumentation and Detectors (physics.ins-det), Gamma-ray astronomy, Cherenkov Telescope Array, Focus (optics), business, Astrophysics - Instrumentation and Methods for Astrophysics, Computer hardware
Abstract

The single-mirror small-size telescope (SST-1M) is one of the three proposed designs for the small-size telescopes (SSTs) of the Cherenkov Telescope Array (CTA) project. The SST-1M will be equipped with a 4 m-diameter segmented mirror dish and an innovative fully digital camera based on silicon photo-multipliers (SiPMs). Since the SST sub-array will consist of up to 70 telescopes, the challenge is not only to build a telescope with excellent performance, but also to design it so that its components can be commissioned, assembled and tested by industry. In this paper we review the basic steps that led to the design concepts for the SST-1M camera and the ongoing realization of the first prototype, with focus on the innovative solutions adopted for the photodetector plane and the readout and trigger parts of the camera. In addition, we report on results of laboratory measurements on real scale elements that validate the camera design and show that it is capable of matching the CTA requirements of operating up to high-moon-light background conditions., 30 pages, 61 figures

Published
2016

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