Descriptor: "Quasars: individual: PKS 1510-089" - Searchworks@Jio Institute Digital Library Search Results

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29 results on '"Quasars: individual: PKS 1510-089"'

1. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Author: Sievers, A.
Published: 2014
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2. Detection of persistent VHE gamma-ray emission from PKS 1510–089 by the MAGIC telescopes during low states between 2012 and 2017.

Author: MAGIC Collaboration:, 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., and Blanch, O.
Subjects: *GAMMA ray astronomy, *TELESCOPES, *QUASARS, *SOLAR flares, *ASTRONOMICAL observations
Abstract: Context. 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 (9.5σ) VHE gamma-ray emission at the level of (4.27 ± 0.61stat) × 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. [ABSTRACT FROM AUTHOR]
Published: 2018
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3. Multiwavelength variability study and search for periodicity of PKS 1510-089.

Author: Castignani, G., Pian, E., Belloni, T. M., D'Ammando, F., Foschini, L., Ghisellini, G., Pursimo, T., Bazzano, A., Beckmann, V., Bianchin, V., Fiocchi, M. T., Impiombato, D., Raiteri, C. M., Soldi, S., Tagliaferri, G., Treves, A., and Türler, M.
Subjects: *ACTIVE galactic nuclei, *BL Lacertae objects, *STELLAR luminosity function, *GAMMA rays, *OPTICAL telescopes
Abstract: Context: Blazars are the most luminous and variable active galactic nuclei (AGNs). They are thus excellent probes of accretion and emission processes close to the central engine. Aims: We concentrate here on PKS 1510-089 (z = 0.36), a blazar belonging to the flat-spectrum radio quasar subclass, an extremely powerful gamma-ray source and one of the brightest in the Fermi-LAT catalog. We aim to study the complex variability of this blazar's bright multiwavelength spectrum, to identify the physical parameters responsible for the variations and the timescales of possible recurrence and quasi-periodicity at high energies. Methods: The blazar PKS 1510-089 was observed twice in hard X-rays with the IBIS instrument onboard INTEGRAL during the flares of Jan. 2009 and Jan. 2010, and simultaneously with Swift and the Nordic Optical Telescope (NOT), in addition to the constant Fermi monitoring. We also measured the optical polarization in several bands on 18 Jan. 2010 at the NOT.Using these and archival data we constructed historical light curves at gamma-to-radio wavelengths covering nearly 20 yr and applied tests of fractional and correlated variability. We assembled spectral energy distributions (SEDs) based on these data and compared them with those at two previous epochs, by applying a model based on synchrotron and inverse Compton radiation from blazars. Results: The modeling of the SEDs suggests that the physical quantities that undergo the largest variations are the total power injected into the emitting region and the random Lorentz factor of the electron distribution cooling break, that are higher in the higher gamma-ray states. This suggests a correlation of the injected power with enhanced activity of the acceleration mechanism. The cooling likely takes place at a distance of ~1000 Schwarzschild radii(~0.03 pc) from the central engine - a distance muchsmaller than the broad line region (BLR) radius. The emission at a few hundred GeV can be reproduced with inverse Compton scattering of highly relativistic electrons off far-infrared photons if these are located much farther than the BLR, that is, around 0.2 pc from the AGN, presumably in a dusty torus. We determine a luminosity of the thermal component due to the inner accretion disk of Ld ≃ 5.9 × 1045 erg s-1, a BLR luminosity of LBLR ≃ 5.3 × 1044 erg s-1, and a mass of the central black hole of MBH ≃ 3 × 108 M⊙.The fractional variability as a function of wavelength follows the trend expected if X- and gamma-rays are produced by the same electrons as radio and optical photons, respectively. Discrete correlation function (DCF) analysis between the long-term Steward observatory optical V-band and gamma-ray Fermi-LAT light curves yields a good correlation with no measurable delay. Marginal correlation where X-ray photons lag both optical and gamma-ray ones by time lags between 50 and 300 days is found with the DCF.Our time analysis of the RXTE PCA and Fermi-LAT light curves reveals no obvious (quasi-)periodicities, at least up to the maximum timescale (a few years) probed by the light curves, which are severely affected by red noise. [ABSTRACT FROM AUTHOR]
Published: 2017
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4. 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: Abdalla, H. (H.), Adam, R. (R.), Aharonian, F. (F.), Benkhali, F. A. (F. Ait), Anguner, E. O. (E. O.), Arcaro, C. (C.), Armand, C. (C.), Armstrong, T. (T.), Ashkar, H. (H.), Backes, M. (M.), Baghmanyan, V. (V), Martins, V. B. (V. Barbosa), Barnacka, A. (A.), Barnard, M. (M.), Becherini, Y. (Y.), Berge, D. (D.), Bernlohr, K. (K.), Bi, B. (B.), Bottcher, M. (M.), Boisson, C. (C.), Bolmont, J. (J.), Bonnefoy, S. (S.), de Lavergne, M. d. (M. de Bony), Bregeon, J. (J.), Breuhaus, M. (M.), Brun, F. (F.), Brun, P. (P.), Bryan, M. (M.), Buchele, M. (M.), Bulik, T. (T.), Bylund, T. (T.), Caroff, S. (S.), Carosi, A. (A.), Casanova, S. (S.), Chand, T. (T.), Chandra, S. (S.), Chen, A. (A.), Cotter, G. (G.), Mbarubucyeye, J. D. (J. Damascene), Davids, I. D. (I. D.), Davies, J. (J.), Deil, C. (C.), Devin, J. (J.), DeWilt, P. (P.), Dirson, L. (L.), Djannati-Atai, A. (A.), Dmytriiev, A. (A.), Donath, A. (A.), Doroshenko, V. (V), Dyks, J. (J.), Egberts, K. (K.), Eichhorn, F. (F.), Einecke, S. (S.), Emery, G. (G.), Ernenwein, J.-P. (J-P), Feijen, K. (K.), Fegan, S. (S.), Fiasson, A. (A.), de Clairfontaine, G. F. (G. Fichet), Filipovic, M. (M.), Fontaine, G. (G.), Funk, S. (S.), Fuling, M. (M.), Gabici, S. (S.), Gallant, Y. A. (Y. A.), Giavitto, G. (G.), Giunti, L. (L.), Glawion, D. (D.), Glicenstein, J. F. (J. F.), Gottschall, D. (D.), Grondin, M.-H. (M-H), Hahn, J. (J.), Haupt, M. (M.), Hermann, G. (G.), Hinton, J. A. (J. A.), Hofmann, W. (W.), Hoischen, C. (C.), Holch, T. L. (T. L.), Holler, M. (M.), Horbe, M. (M.), Horns, D. (D.), Huber, D. (D.), Jamrozy, M. (M.), Jankowsky, D. (D.), Jankowsky, F. (F.), Jardin-Blicq, A. (A.), Joshi, V. (V), Jung-Richardt, I. (I), Kastendieck, M. A. (M. A.), Katarzynski, K. (K.), Katz, U. (U.), Khangulyan, D. (D.), Khelifi, B. (B.), Klepser, S. (S.), Kluzniak, W. (W.), Komin, N. (Nu), Konno, R. (R.), Kosack, K. (K.), Kostunin, D. (D.), Kreter, M. (M.), Lamanna, G. (G.), Lemiere, A. (A.), Lemoine-Goumard, M. (M.), Lenain, J.-P. (J-P), Levy, C. (C.), Lohse, T. (T.), Lypova, I. (I), Mackey, J. (J.), Majumdar, J. (J.), Malyshev, D. (D.), Marandon, V. (V), Marchegiani, P. (P.), Marcowith, A. (A.), Mares, A. (A.), Marti-Devesa, G. (G.), Marx, R. (R.), Maurin, G. (G.), Meintjes, P. J. (P. J.), Meyer, M. (M.), Mitchell, A. M. (A. M. W.), Moderski, R. (R.), Mohamed, M. (M.), Mohrmann, L. (L.), Montanari, A. (A.), Moore, C. (C.), Morris, P. (P.), Moulin, E. (E.), Muller, J. (J.), Murach, T. (T.), Nakashima, K. (K.), Nayerhoda, A. (A.), de Naurois, M. (M.), Ndiyavala, H. (H.), Niederwanger, F. (F.), Niemiec, D. (D.), Oakes, L. (L.), O'Brien, P. (P.), Odaka, H. (H.), Ohm, S. (S.), Olivera-Nieto, L. (L.), Wilhelmi, E. d. (E. de Ona), Ostrowski, M. (M.), Panter, M. (M.), Panny, S. (S.), Parsons, R. D. (R. D.), Peron, G. (G.), Peyaud, B. (B.), Piel, Q. (Q.), Pita, S. (S.), Poireau, V. (V), Noel, A. P. (A. Priyana), Prokhorov, D. A. (D. A.), Prokoph, H. (H.), Puhlhofer, G. (G.), Punch, M. (M.), Quirrenbach, A. (A.), Raab, S. (S.), Rauth, R. (R.), Reichherzer, P. (P.), Reimer, A. (A.), Reimer, O. (O.), Remy, Q. (Q.), Renaud, M. (M.), Rieger, F. (F.), Rinchiuso, L. (L.), Romoli, C. (C.), Rowell, G. (G.), Rudak, B. (B.), Ruiz-Velasco, E. (E.), Sahakian, V. (V), Sailer, S. (S.), Sanchez, D. A. (D. A.), Santangelo, A. (A.), Sasaki, M. (M.), Scalici, M. (M.), Schussler, F. (F.), Schutte, H. M. (H. M.), Schwanke, U. (U.), Schwemmer, S. (S.), Seglar-Arroyo, M. (M.), Senniappan, M. (M.), Seyffert, A. S. (A. S.), Shafi, N. (N.), Shiningayamwe, K. (K.), Simoni, R. (R.), Sinha, A. (A.), Sol, H. (H.), Specovius, A. (A.), Spencer, S. (S.), Sun, L. (L.), Steenkamp, R. (R.), Stegmann, C. (C.), Steinmassl, S. (S.), Steppa, C. (C.), Takahashi, T. (T.), Tavernier, T. (T.), Taylor, A. M. (A. M.), Terrier, R. (R.), Tiziani, D. (D.), Tluczykont, M. (M.), Tomankova, L. (L.), Trichard, C. (C.), Tsirou, M. (M.), Tuffs, R. (R.), Uchiyama, Y. (Y.), van der Walt, D. J. (D. J.), van Eldik, C. (C.), van Rensburg, C. (C.), van Soelen, B. (B.), Vasileiadis, G. (G.), Veh, J. (J.), Venter, C. (C.), Vincent, P. (P.), Vink, J. (J.), Volk, H. J. (H. J.), Vuillaume, T. (T.), Wadiasingh, Z. (Z.), Wagner, S. J. (S. J.), Watson, J. (J.), Werner, F. (F.), White, R. (R.), Wierzcholska, A. (A.), Wong, Y. W. (Yu W.), Yusafzai, A. (A.), Zacharias, M. (M.), Zanin, R. (R.), Zargaryan, D. (D.), Zdziarski, A. A. (A. A.), Zech, A. (A.), Zhu, S. J. (S. J.), Zorn, J. (J.), Zouari, S. (S.), Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Engels, A. A. (A. Arbet), Asano, K. (K.), Baack, D. (D.), Babic, A. (A.), Baquero, A. (A.), de Almeida, U. B. (U. Barres), Barrio, J. A. (J. A.), Gonzalez, J. B. (J. Becerra), Bednarek, W. (W.), Bellizzi, L. (L.), Bernardini, E. (E.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Busetto, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cerruti, M. (M.), Chai, Y. (Y.), Chilingarian, A. (A.), Cikota, S. (S.), Colak, S. M. (S. M.), Colin, U. (U.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Amico, G. (G.), D'Elia, V. (V), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Depaoli, D. (D.), Di Pierro, F. (F.), Di Venere, L. (L.), Espineira, E. D. (E. Do Souto), Prester, D. D. (D. Dominis), Donini, A. (A.), Dorner, D. (D.), Doro, M. (M.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Ferrara, G. (G.), Foffano, L. (L.), Fonseca, M. V. (M., V), Font, L. (L.), Fruck, C. (C.), Fukami, S. (S.), Lopez, R. J. (R. J. Garcia), Garczarczyk, M. (M.), Gasparyan, S. (S.), Gaug, M. (M.), Giglietto, N. (N.), Giordano, F. (F.), Gliwny, P. (P.), Godinovic, N. (N.), Green, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Heckmann, L. (L.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Hutten, M. (M.), Inada, T. (T.), Inoue, S. (S.), Ishio, K. (K.), Iwamura, Y. (Y.), Jouvin, L. (L.), Kajiwara, Y. (Y.), Karjalainen, M. (M.), Kerszberg, D. (D.), Kobayashi, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Lamastra, A. (A.), Lelas, D. (D.), Leone, F. (F.), Lindfors, E. (E.), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Lopez-Coto, R. (R.), Lopez-Oramas, A. (A.), Loporchio, S. (S.), Fraga, B. M. (B. Machado de Oliveira), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Mallamaci, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Mazin, D. (D.), Mender, S. (S.), Micanovi, S. (S.), Miceli, D. (D.), Miener, T. (T.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Molina, E. (E.), Moralejo, A. (A.), Morcuende, D. (D.), Moreno, V. (V), Moretti, E. (E.), Munar-Adrover, P. (P.), Neustroev, V. (V), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nozaki, S. (S.), Ohtani, Y. (Y.), Oka, T. (T.), Otero-Santos, J. (J.), Palatiello, M. (M.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pavletic, L. (L.), Penil, P. (P.), Perennes, C. (C.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), Prandini, E. (E.), Priyadarshi, C. (C.), Puljak, I. (I), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saha, L. (L.), Sahakyan, N. (N.), Saito, T. (T.), Sakurai, S. (S.), Satalecka, K. (K.), Schleicher, B. (B.), Schmidt, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I), Sobczynska, D. (D.), Spolon, A. (A.), Stamerra, A. (A.), Strom, D. (D.), Strzys, M. (M.), Suda, Y. (Y.), Suric, T. (T.), Takahashi, M. (M.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Tosti, L. (L.), Truzzi, S. (S.), van Scherpenberg, J. (J.), Vanzo, G. (G.), Acosta, M. V. (M. Vazquez), Ventura, S. (S.), Verguilov, V. (V.), Vigorito, C. F. (C. F.), Vitale, V. (V.), Vovk, I. (I), Will, M. (M.), Zaric, D. (D.), Jorstad, S. G. (S. G.), Marscher, A. P. (A. P.), Boccardi, B. (B.), Casadio, C. (C.), Hodgson, J. (J.), Kim, J.-Y. (J-Y), Krichbaum, T. P. (T. P.), Lahteenmaki, A. (A.), Tornikoski, M. (M.), Traianou, E. (E.), Weaver, Z. R. (Z. R.), Abdalla, H. (H.), Adam, R. (R.), Aharonian, F. (F.), Benkhali, F. A. (F. Ait), Anguner, E. O. (E. O.), Arcaro, C. (C.), Armand, C. (C.), Armstrong, T. (T.), Ashkar, H. (H.), Backes, M. (M.), Baghmanyan, V. (V), Martins, V. B. (V. Barbosa), Barnacka, A. (A.), Barnard, M. (M.), Becherini, Y. (Y.), Berge, D. (D.), Bernlohr, K. (K.), Bi, B. (B.), Bottcher, M. (M.), Boisson, C. (C.), Bolmont, J. (J.), Bonnefoy, S. (S.), de Lavergne, M. d. (M. de Bony), Bregeon, J. (J.), Breuhaus, M. (M.), Brun, F. (F.), Brun, P. (P.), Bryan, M. (M.), Buchele, M. (M.), Bulik, T. (T.), Bylund, T. (T.), Caroff, S. (S.), Carosi, A. (A.), Casanova, S. (S.), Chand, T. (T.), Chandra, S. (S.), Chen, A. (A.), Cotter, G. (G.), Mbarubucyeye, J. D. (J. Damascene), Davids, I. D. (I. D.), Davies, J. (J.), Deil, C. (C.), Devin, J. (J.), DeWilt, P. (P.), Dirson, L. (L.), Djannati-Atai, A. (A.), Dmytriiev, A. (A.), Donath, A. (A.), Doroshenko, V. (V), Dyks, J. (J.), Egberts, K. (K.), Eichhorn, F. (F.), Einecke, S. (S.), Emery, G. (G.), Ernenwein, J.-P. (J-P), Feijen, K. (K.), Fegan, S. (S.), Fiasson, A. (A.), de Clairfontaine, G. F. (G. Fichet), Filipovic, M. (M.), Fontaine, G. (G.), Funk, S. (S.), Fuling, M. (M.), Gabici, S. (S.), Gallant, Y. A. (Y. A.), Giavitto, G. (G.), Giunti, L. (L.), Glawion, D. (D.), Glicenstein, J. F. (J. F.), Gottschall, D. (D.), Grondin, M.-H. (M-H), Hahn, J. (J.), Haupt, M. (M.), Hermann, G. (G.), Hinton, J. A. (J. A.), Hofmann, W. (W.), Hoischen, C. (C.), Holch, T. L. (T. L.), Holler, M. (M.), Horbe, M. (M.), Horns, D. (D.), Huber, D. (D.), Jamrozy, M. (M.), Jankowsky, D. (D.), Jankowsky, F. (F.), Jardin-Blicq, A. (A.), Joshi, V. (V), Jung-Richardt, I. (I), Kastendieck, M. A. (M. A.), Katarzynski, K. (K.), Katz, U. (U.), Khangulyan, D. (D.), Khelifi, B. (B.), Klepser, S. (S.), Kluzniak, W. (W.), Komin, N. (Nu), Konno, R. (R.), Kosack, K. (K.), Kostunin, D. (D.), Kreter, M. (M.), Lamanna, G. (G.), Lemiere, A. (A.), Lemoine-Goumard, M. (M.), Lenain, J.-P. (J-P), Levy, C. (C.), Lohse, T. (T.), Lypova, I. (I), Mackey, J. (J.), Majumdar, J. (J.), Malyshev, D. (D.), Marandon, V. (V), Marchegiani, P. (P.), Marcowith, A. (A.), Mares, A. (A.), Marti-Devesa, G. (G.), Marx, R. (R.), Maurin, G. (G.), Meintjes, P. J. (P. J.), Meyer, M. (M.), Mitchell, A. M. (A. M. W.), Moderski, R. (R.), Mohamed, M. (M.), Mohrmann, L. (L.), Montanari, A. (A.), Moore, C. (C.), Morris, P. (P.), Moulin, E. (E.), Muller, J. (J.), Murach, T. (T.), Nakashima, K. (K.), Nayerhoda, A. (A.), de Naurois, M. (M.), Ndiyavala, H. (H.), Niederwanger, F. (F.), Niemiec, D. (D.), Oakes, L. (L.), O'Brien, P. (P.), Odaka, H. (H.), Ohm, S. (S.), Olivera-Nieto, L. (L.), Wilhelmi, E. d. (E. de Ona), Ostrowski, M. (M.), Panter, M. (M.), Panny, S. (S.), Parsons, R. D. (R. D.), Peron, G. (G.), Peyaud, B. (B.), Piel, Q. (Q.), Pita, S. (S.), Poireau, V. (V), Noel, A. P. (A. Priyana), Prokhorov, D. A. (D. A.), Prokoph, H. (H.), Puhlhofer, G. (G.), Punch, M. (M.), Quirrenbach, A. (A.), Raab, S. (S.), Rauth, R. (R.), Reichherzer, P. (P.), Reimer, A. (A.), Reimer, O. (O.), Remy, Q. (Q.), Renaud, M. (M.), Rieger, F. (F.), Rinchiuso, L. (L.), Romoli, C. (C.), Rowell, G. (G.), Rudak, B. (B.), Ruiz-Velasco, E. (E.), Sahakian, V. (V), Sailer, S. (S.), Sanchez, D. A. (D. A.), Santangelo, A. (A.), Sasaki, M. (M.), Scalici, M. (M.), Schussler, F. (F.), Schutte, H. M. (H. M.), Schwanke, U. (U.), Schwemmer, S. (S.), Seglar-Arroyo, M. (M.), Senniappan, M. (M.), Seyffert, A. S. (A. S.), Shafi, N. (N.), Shiningayamwe, K. (K.), Simoni, R. (R.), Sinha, A. (A.), Sol, H. (H.), Specovius, A. (A.), Spencer, S. (S.), Sun, L. (L.), Steenkamp, R. (R.), Stegmann, C. (C.), Steinmassl, S. (S.), Steppa, C. (C.), Takahashi, T. (T.), Tavernier, T. (T.), Taylor, A. M. (A. M.), Terrier, R. (R.), Tiziani, D. (D.), Tluczykont, M. (M.), Tomankova, L. (L.), Trichard, C. (C.), Tsirou, M. (M.), Tuffs, R. (R.), Uchiyama, Y. (Y.), van der Walt, D. J. (D. J.), van Eldik, C. (C.), van Rensburg, C. (C.), van Soelen, B. (B.), Vasileiadis, G. (G.), Veh, J. (J.), Venter, C. (C.), Vincent, P. (P.), Vink, J. (J.), Volk, H. J. (H. J.), Vuillaume, T. (T.), Wadiasingh, Z. (Z.), Wagner, S. J. (S. J.), Watson, J. (J.), Werner, F. (F.), White, R. (R.), Wierzcholska, A. (A.), Wong, Y. W. (Yu W.), Yusafzai, A. (A.), Zacharias, M. (M.), Zanin, R. (R.), Zargaryan, D. (D.), Zdziarski, A. A. (A. A.), Zech, A. (A.), Zhu, S. J. (S. J.), Zorn, J. (J.), Zouari, S. (S.), Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Engels, A. A. (A. Arbet), Asano, K. (K.), Baack, D. (D.), Babic, A. (A.), Baquero, A. (A.), de Almeida, U. B. (U. Barres), Barrio, J. A. (J. A.), Gonzalez, J. B. (J. Becerra), Bednarek, W. (W.), Bellizzi, L. (L.), Bernardini, E. (E.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Busetto, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cerruti, M. (M.), Chai, Y. (Y.), Chilingarian, A. (A.), Cikota, S. (S.), Colak, S. M. (S. M.), Colin, U. (U.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Amico, G. (G.), D'Elia, V. (V), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Depaoli, D. (D.), Di Pierro, F. (F.), Di Venere, L. (L.), Espineira, E. D. (E. Do Souto), Prester, D. D. (D. Dominis), Donini, A. (A.), Dorner, D. (D.), Doro, M. (M.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Ferrara, G. (G.), Foffano, L. (L.), Fonseca, M. V. (M., V), Font, L. (L.), Fruck, C. (C.), Fukami, S. (S.), Lopez, R. J. (R. J. Garcia), Garczarczyk, M. (M.), Gasparyan, S. (S.), Gaug, M. (M.), Giglietto, N. (N.), Giordano, F. (F.), Gliwny, P. (P.), Godinovic, N. (N.), Green, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Heckmann, L. (L.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Hutten, M. (M.), Inada, T. (T.), Inoue, S. (S.), Ishio, K. (K.), Iwamura, Y. (Y.), Jouvin, L. (L.), Kajiwara, Y. (Y.), Karjalainen, M. (M.), Kerszberg, D. (D.), Kobayashi, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Lamastra, A. (A.), Lelas, D. (D.), Leone, F. (F.), Lindfors, E. (E.), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Lopez-Coto, R. (R.), Lopez-Oramas, A. (A.), Loporchio, S. (S.), Fraga, B. M. (B. Machado de Oliveira), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Mallamaci, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Mazin, D. (D.), Mender, S. (S.), Micanovi, S. (S.), Miceli, D. (D.), Miener, T. (T.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Molina, E. (E.), Moralejo, A. (A.), Morcuende, D. (D.), Moreno, V. (V), Moretti, E. (E.), Munar-Adrover, P. (P.), Neustroev, V. (V), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nozaki, S. (S.), Ohtani, Y. (Y.), Oka, T. (T.), Otero-Santos, J. (J.), Palatiello, M. (M.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pavletic, L. (L.), Penil, P. (P.), Perennes, C. (C.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), Prandini, E. (E.), Priyadarshi, C. (C.), Puljak, I. (I), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saha, L. (L.), Sahakyan, N. (N.), Saito, T. (T.), Sakurai, S. (S.), Satalecka, K. (K.), Schleicher, B. (B.), Schmidt, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I), Sobczynska, D. (D.), Spolon, A. (A.), Stamerra, A. (A.), Strom, D. (D.), Strzys, M. (M.), Suda, Y. (Y.), Suric, T. (T.), Takahashi, M. (M.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Tosti, L. (L.), Truzzi, S. (S.), van Scherpenberg, J. (J.), Vanzo, G. (G.), Acosta, M. V. (M. Vazquez), Ventura, S. (S.), Verguilov, V. (V.), Vigorito, C. F. (C. F.), Vitale, V. (V.), Vovk, I. (I), Will, M. (M.), Zaric, D. (D.), Jorstad, S. G. (S. G.), Marscher, A. P. (A. P.), Boccardi, B. (B.), Casadio, C. (C.), Hodgson, J. (J.), Kim, J.-Y. (J-Y), Krichbaum, T. P. (T. P.), Lahteenmaki, A. (A.), Tornikoski, M. (M.), Traianou, E. (E.), and Weaver, Z. R. (Z. R.)
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.
Published: 2021

5. HESS and MAGIC observations of a sudden cessation of a very-high-energy gamma-ray flare in PKS 1510-089 in May 2016

Author: Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. Ait, Anguner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V, Martins, V. Barbosa, Barnacka, A., Barnard, M., Becherini, Yvonne, Berge, D., Bernlohr, K., Bi, B., Bottcher, M., Boisson, C., Bolmont, J., Bonnefoy, S., de Lavergne, M. de Bony, Bregeon, J., Breuhaus, M., Brun, F., Brun, P., Bryan, M., Buchele, M., Bulik, T., Bylund, Tomas, Caroff, S., Carosi, A., Casanova, S., Chand, T., Chandra, S., Chen, A., Cotter, G., Mbarubucyeye, J. Damascene, Davids, I. D., Davies, J., Deil, C., Devin, J., DeWilt, P., Dirson, L., Djannati-Atai, 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., de Clairfontaine, G. Fichet, Filipovic, M., Fontaine, G., Funk, S., Fuling, 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, Kastendieck, M. A., Katarzynski, K., Katz, U., Khangulyan, D., Khelifi, B., Klepser, S., Kluzniak, W., Komin, Nu, 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., 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, D., Oakes, L., O'Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, 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., Puhlhofer, G., Punch, Michael, 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., Schussler, F., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, Mohanraj, Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., 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, Yu W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Asano, K., Baack, D., Babic, A., Baquero, A., de Almeida, U. Barres, Barrio, J. A., Gonzalez, J. Becerra, Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., 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., Espineira, E. Do Souto, Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. Fallah, Fattorini, A., Ferrara, G., Foffano, L., Fonseca, M. , V, Font, L., Fruck, C., Fukami, S., Lopez, R. J. Garcia, Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hutten, 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., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Fraga, B. Machado de Oliveira, Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Priyadarshi, C., Weaver, Z. R., Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. Ait, Anguner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V, Martins, V. Barbosa, Barnacka, A., Barnard, M., Becherini, Yvonne, Berge, D., Bernlohr, K., Bi, B., Bottcher, M., Boisson, C., Bolmont, J., Bonnefoy, S., de Lavergne, M. de Bony, Bregeon, J., Breuhaus, M., Brun, F., Brun, P., Bryan, M., Buchele, M., Bulik, T., Bylund, Tomas, Caroff, S., Carosi, A., Casanova, S., Chand, T., Chandra, S., Chen, A., Cotter, G., Mbarubucyeye, J. Damascene, Davids, I. D., Davies, J., Deil, C., Devin, J., DeWilt, P., Dirson, L., Djannati-Atai, 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., de Clairfontaine, G. Fichet, Filipovic, M., Fontaine, G., Funk, S., Fuling, 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, Kastendieck, M. A., Katarzynski, K., Katz, U., Khangulyan, D., Khelifi, B., Klepser, S., Kluzniak, W., Komin, Nu, 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., 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, D., Oakes, L., O'Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., Wilhelmi, E. de Ona, 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., Puhlhofer, G., Punch, Michael, 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., Schussler, F., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, Mohanraj, Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., 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, Yu W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Asano, K., Baack, D., Babic, A., Baquero, A., de Almeida, U. Barres, Barrio, J. A., Gonzalez, J. Becerra, Bednarek, W., Bellizzi, L., Bernardini, E., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., 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., Espineira, E. Do Souto, Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. Fallah, Fattorini, A., Ferrara, G., Foffano, L., Fonseca, M. , V, Font, L., Fruck, C., Fukami, S., Lopez, R. J. Garcia, Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinovic, N., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hutten, 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., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Loporchio, S., Fraga, B. Machado de Oliveira, Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Priyadarshi, C., and Weaver, Z. R.
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) gamma rays. The VHE gamma -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 gamma -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 similar to 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 gamma -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 gamma -ray flare, even though the detailed flux evolution differs from the VHE gamma -ray light curve. Interestingly, a steep flux decrease was observed at the same time as the cessation of the VHE gamma -ray flare. In the high-energy (HE, E> 100 MeV) gamma -ray band, only a moderate flux increase was observed with Fermi-LAT, while the HE gamma -ray spectrum significantly hardens up to a photon index of 1.6. A search for broad-line region (BLR) absorption features in the gamma -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 similar to 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 gamma rays must have been produced far down in the jet, where turbulent plasma crosses a standing shock
Published: 2021
Full Text: View/download PDF

6. Turbulent spectra of the brightest gamma-ray flares of blazars.

Author: Kohler, Susanna and Nalewajko, Krzysztof
Subjects: *TURBULENCE, *GAMMA rays, *BL Lacertae objects, *TELESCOPES, *QUASARS, *GAMMA ray astronomy, *SOLAR flares
Abstract: We investigate the spectral properties of the brightest gamma-ray flares of blazars detected by the Fermi Large Area Telescope. We search for the presence of spectral breaks and measure the spectral curvature on typical time-scales of a few days. We identify significant spectral breaks in fewer than half of the analysed flares, but their parameters do not show any discernible regularities, and in particular there is no indication for gamma-ray absorption at any fixed source-frame photon energy. More interestingly, we find that the studied blazars are characterized by significant spectral variability. Gamma-ray flares of short duration are often characterized by strong spectral curvature, with the spectral peak located above 100 MeV. Since these spectral variations are observed despite excellent photon statistics, they must reflect temporal fluctuations in the energy distributions of the emitting particles. We suggest that highly regular gamma-ray spectra of blazars integrated over long time-scales emerge from a superposition of many short-lived irregular components with relatively narrow spectra. This would imply that the emitting particles are accelerated in strongly turbulent environments. [ABSTRACT FROM AUTHOR]
Published: 2015
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7. 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

8. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012.

Author: Aleksi'c, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., de Almeida, U. Barres, Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Carmona, E., Carosi, A., and Carreto Fidalgo, D.
Subjects: *GAMMA rays, *QUASARS, *SPECTRAL energy distribution, *COMPTON scattering, *ACTIVE galaxies
Abstract: Aims. Amongst more than fifty blazars detected in very high energy (VHE, E > 100 GeV) γ rays, only three belong to the subclass of flat spectrum radio quasars (FSRQs). The detection of FSRQs in the VHE range is challenging, mainly because of their soft spectra in the GeV-TeV regime. MAGIC observed PKS 1510-089 (z = 0.36) starting 2012 February 3 until April 3 during a high activity state in the high energy (HE, E > 100 MeV) γ-ray band observed by AGILE and Fermi.MAGIC observations result in the detection of a source with significance of 6.0 standard deviations (σ). We study the multi-frequency behaviour of the source at the epoch of MAGIC observation, collecting quasi-simultaneous data at radio and optical (GASP-WEBT and F-Gamma collaborations, REM, Steward, Perkins, Liverpool, OVRO, and VLBA telescopes), X-ray (Swift satellite), and HE γ-ray frequencies. Methods. We study the VHE γ-ray emission, together with the multi-frequency light curves, 43 GHz radio maps, and spectral energy distribution (SED) of the source. The quasi-simultaneous multi-frequency SED from the millimetre radio band to VHE γ rays is modelled with a one-zone inverse Compton model. We study two different origins of the seed photons for the inverse Compton scattering, namely the infrared torus and a slow sheath surrounding the jet around the Very Long Baseline Array (VLBA) core. Results. We find that the VHE γ-ray emission detected from PKS 1510-089 in 2012 February-April agrees with the previous VHE observations of the source from 2009 March-April. We find no statistically significant variability during the MAGIC observations on daily, weekly, or monthly time scales, while the other two known VHE FSRQs (3C 279 and PKS 1222+216) have shown daily scale to sub-hour variability. The γ-ray SED combining AGILE, Fermi and MAGIC data joins smoothly and shows no hint of a break. The multi-frequency light curves suggest a common origin for the millimetre radio and HE γ-ray emission, and the HE γ-ray flaring starts when the new component is ejected from the 43GHz VLBA core and the studied SED models fit the data well. However, the fast HE γ-ray variability requires that within the modelled large emitting region, more compact regions must exist. We suggest that these observed signatures would be most naturally explained by a turbulent plasma flowing at a relativistic speed down the jet and crossing a standing conical shock. [ABSTRACT FROM AUTHOR]
Published: 2014
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9. Time-dependent simulations of emission from the FSRQ PKS 1510−089: multiwavelength variability of external Compton and synchrotron self-Compton models.

Author: Chen, Xuhui, Fossati, Giovanni, Böttcher, Markus, and Liang, Edison
Subjects: *SIMULATION methods & models, *SPECTRAL energy distribution, *WAVELENGTHS, *SYNCHROTRONS, *SPECTRA of quasars, *MATHEMATICAL models, *ACTIVE galaxies
Abstract: ABSTRACT We present results of modelling the broad-band spectral energy distribution (SED) and multiwavelength variability of the bright flat spectrum radio quasars PKS 1510−089 with our time-dependent multizone Monte Carlo/Fokker-Planck code. As the primary source of seed photons for inverse Compton scattering, we consider radiation from the broad-line region (BLR), from the hot dust of the molecular torus and the local synchrotron radiation [synchrotron self-Compton (SSC)]. We evaluate the viability of different Compton models by comparing simulated multiwavelength light curves and SEDs with one of the best observed flares by PKS 1510−089, in 2009 March. The time dependence of our code and its correct handling of light travel time effects allow us to fully take into account the effect of the finite size of the active region, and in turn to fully exploit the information carried by time-resolved observed SEDs that are becoming increasingly available since the launch of Fermi. We confirm that the spectrum adopted for the external radiation field has an important impact on the modelling of the SED, in particular for the lower energy end of the Compton component which is observed in the X-ray band, which in turn is one of the most critical bands to assess the differences between external Compton and SSC emission. In the context of the scenario presented in this paper, where the flaring is caused by the increase of the number of relativistic electrons ascribed to the effect of the interaction of a portion of the jet (blob) with a shock, we cannot firmly discriminate the three main scenarios for γ-ray emission. However, results show clearly the differences produced by a more realistic treatment of the emitting source in the shape of SEDs and their time variability over relevant, observable time-scales, and demonstrate the crucial importance of time-dependent multizone models to advance our understanding of the physics of these sources, by taking full advantage of the wealth of information offered by the high-quality data of current multiwavelength campaigns. [ABSTRACT FROM AUTHOR]
Published: 2012
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10. Optical monitoring of PKS 1510−089: a binary black hole system?

Author: Wu, J., Zhou, X., Peng, B., Ma, J., Jiang, Z., and Chen, J.
Subjects: *SUPERMASSIVE black holes, *ASTRONOMICAL instruments, *BL Lacertae objects, *TELESCOPES, *ASTRONOMY, *LIGHT
Abstract: Three deep flux minima with nearly the same time-scales and intervals have been observed for the blazar PKS 1510−089 in the past few years. It has been proposed that there is a binary black hole system at the nucleus of this object, and a new minimum was predicted to occur in 2002 March. We monitored this source with a 60/90 cm Schmidt telescope from 2002 February to April. In combination with the data obtained by Xie et al. in the same period, for the 2002 minimum we present a nearly symmetric light curve, which would be required by an eclipsing model of a binary black hole system. We also constrain the time-scale of the minimum to be 35 min, which is more consistent with the time-scales (∼42 min) of the three previous minima than is the 89 min time-scale given by Xie et al. The wiggling milliarcsecond radio jet observed in this object is taken as further evidence for the binary black hole system. The ‘coupling’ of the periodicity in the light curve and the helicity in the radio jet is discussed for blazars in the framework of a binary black hole system. [ABSTRACT FROM AUTHOR]
Published: 2005
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11. Detection of persistent VHE gamma-ray emission from PKS 1510–089 by the MAGIC telescopes during low states between 2012 and 2017

Author: Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Engels, A. A. (A. Arbet), Arcaro, C. (C.), Baack, D. (D.), Babic, A. (A.), Banerjee, B. (B.), Bangale, P. (P.), Barres de Almeida, U. (U.), Barrio, J. A. (J. A.), Bednarek, W. (W.), Bernardini, E. (E.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cikota, S. (S.), Colak, S. M. (S. M.), Colin, P. (P.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Elia, V. (V.), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Di Pierro, F. (F.), Do Souto Espinera, E. (E.), Dominguez, A. (A.), Prester, D. D. (D. Dominis), Dorner, D. (D.), Doro, M. (M.), Einecke, S. (S.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Fernandez-Barral, A. (A.), Ferrara, G. (G.), Fidalgo, D. (D.), Foffano, L. (L.), Fonseca, M. V. (M. V.), Font, L. (L.), Fruck, C. (C.), Galindo, D. (D.), Gallozzi, S. (S.), Garcia Lopez, R. J. (R. J.), Garczarczyk, M. (M.), Gaug, M. (M.), Giammaria, P. (P.), Godinovic, N. (N.), Guberman, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Hassan, T. (T.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Inoue, S. (S.), Ishio, K. (K.), Iwamura, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Kuvezdic, D. (D.), Lamastra, A. (A.), Lelas, D. (D.), Leone, F. (F.), . (), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Lopez-Oramas, A. (A.), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Masuda, S. (S.), Mazin, D. (D.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Molina, E. (E.), Moralejo, A. (A.), Moreno, V. (V.), Moretti, E. (E.), Munar-Adrover, P. (P.), Neustroev, V. (V.), Niedzwiecki, A. (A.), Nievas Rosillo, M. (M.), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nogues, L. (L.), Paiano, S. (S.), Palacio, J. (J.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pedaletti, G. (G.), Penil, P. (P.), Peresano, M. (M.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), Prandini, E. (E.), Puljak, I. (I.), Garcia, J. R. (J. R.), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saha, L. (L.), Saito, T. (T.), Satalecka, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I.), Sobczynska, D. (D.), Somero, A. (A.), Stamerra, A. (A.), Strzys, M. (M.), Suric, T. (T.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Tsujimoto, S. (S.), van Scherpenberg, J. (J.), Vanzo, G. (G.), Vazquez Acosta, M. (M.), Vovk, I. (I.), Ward, J. E. (J. E.), Will, M. (M.), Zari, D. (D.), Becerra Gonzalez, J. (J.), Raiteri, C. M. (C. M.), Sandrinelli, A. (A.), Hovatta, T. (T.), Kiehlmann, S. (S.), Max-Moerbeck, W. (W.), Tornikoski, M. (M.), Lahteenmaki, A. (A.), Tammi, J. (J.), Ramakrishnan, V. (V.), Thum, C. (C.), Agudo, I. (I.), Molina, S. N. (S. N.), Gomez, J. L. (J. L.), Fuentes, A. (A.), Casadio, C. (C.), Traianou, E. (E.), Myserlis, I. (I.), Kim, J. -. (J. -Y.), Acciari, V. A. (V. A.), Ansoldi, S. (S.), Antonelli, L. A. (L. A.), Engels, A. A. (A. Arbet), Arcaro, C. (C.), Baack, D. (D.), Babic, A. (A.), Banerjee, B. (B.), Bangale, P. (P.), Barres de Almeida, U. (U.), Barrio, J. A. (J. A.), Bednarek, W. (W.), Bernardini, E. (E.), Berti, A. (A.), Besenrieder, J. (J.), Bhattacharyya, W. (W.), Bigongiari, C. (C.), Biland, A. (A.), Blanch, O. (O.), Bonnoli, G. (G.), Carosi, R. (R.), Ceribella, G. (G.), Cikota, S. (S.), Colak, S. M. (S. M.), Colin, P. (P.), Colombo, E. (E.), Contreras, J. L. (J. L.), Cortina, J. (J.), Covino, S. (S.), D'Elia, V. (V.), Da Vela, P. (P.), Dazzi, F. (F.), De Angelis, A. (A.), De Lotto, B. (B.), Delfino, M. (M.), Delgado, J. (J.), Di Pierro, F. (F.), Do Souto Espinera, E. (E.), Dominguez, A. (A.), Prester, D. D. (D. Dominis), Dorner, D. (D.), Doro, M. (M.), Einecke, S. (S.), Elsaesser, D. (D.), Ramazani, V. F. (V. Fallah), Fattorini, A. (A.), Fernandez-Barral, A. (A.), Ferrara, G. (G.), Fidalgo, D. (D.), Foffano, L. (L.), Fonseca, M. V. (M. V.), Font, L. (L.), Fruck, C. (C.), Galindo, D. (D.), Gallozzi, S. (S.), Garcia Lopez, R. J. (R. J.), Garczarczyk, M. (M.), Gaug, M. (M.), Giammaria, P. (P.), Godinovic, N. (N.), Guberman, D. (D.), Hadasch, D. (D.), Hahn, A. (A.), Hassan, T. (T.), Herrera, J. (J.), Hoang, J. (J.), Hrupec, D. (D.), Inoue, S. (S.), Ishio, K. (K.), Iwamura, Y. (Y.), Kubo, H. (H.), Kushida, J. (J.), Kuvezdic, D. (D.), Lamastra, A. (A.), Lelas, D. (D.), Leone, F. (F.), . (), Lombardi, S. (S.), Longo, F. (F.), Lopez, M. (M.), Lopez-Oramas, A. (A.), Maggio, C. (C.), Majumdar, P. (P.), Makariev, M. (M.), Maneva, G. (G.), Manganaro, M. (M.), Mannheim, K. (K.), Maraschi, L. (L.), Mariotti, M. (M.), Martinez, M. (M.), Masuda, S. (S.), Mazin, D. (D.), Minev, M. (M.), Miranda, J. M. (J. M.), Mirzoyan, R. (R.), Molina, E. (E.), Moralejo, A. (A.), Moreno, V. (V.), Moretti, E. (E.), Munar-Adrover, P. (P.), Neustroev, V. (V.), Niedzwiecki, A. (A.), Nievas Rosillo, M. (M.), Nigro, C. (C.), Nilsson, K. (K.), Ninci, D. (D.), Nishijima, K. (K.), Noda, K. (K.), Nogues, L. (L.), Paiano, S. (S.), Palacio, J. (J.), Paneque, D. (D.), Paoletti, R. (R.), Paredes, J. M. (J. M.), Pedaletti, G. (G.), Penil, P. (P.), Peresano, M. (M.), Persic, M. (M.), Moroni, P. G. (P. G. Prada), Prandini, E. (E.), Puljak, I. (I.), Garcia, J. R. (J. R.), Rhode, W. (W.), Ribo, M. (M.), Rico, J. (J.), Righi, C. (C.), Rugliancich, A. (A.), Saha, L. (L.), Saito, T. (T.), Satalecka, K. (K.), Schweizer, T. (T.), Sitarek, J. (J.), Snidaric, I. (I.), Sobczynska, D. (D.), Somero, A. (A.), Stamerra, A. (A.), Strzys, M. (M.), Suric, T. (T.), Tavecchio, F. (F.), Temnikov, P. (P.), Terzic, T. (T.), Teshima, M. (M.), Torres-Alba, N. (N.), Tsujimoto, S. (S.), van Scherpenberg, J. (J.), Vanzo, G. (G.), Vazquez Acosta, M. (M.), Vovk, I. (I.), Ward, J. E. (J. E.), Will, M. (M.), Zari, D. (D.), Becerra Gonzalez, J. (J.), Raiteri, C. M. (C. M.), Sandrinelli, A. (A.), Hovatta, T. (T.), Kiehlmann, S. (S.), Max-Moerbeck, W. (W.), Tornikoski, M. (M.), Lahteenmaki, A. (A.), Tammi, J. (J.), Ramakrishnan, V. (V.), Thum, C. (C.), Agudo, I. (I.), Molina, S. N. (S. N.), Gomez, J. L. (J. L.), Fuentes, A. (A.), Casadio, C. (C.), Traianou, E. (E.), Myserlis, I. (I.), and Kim, J. -. (J. -Y.)
Abstract: Context: 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 (9.5σ) VHE gamma-ray emission at the level of (4.27 ± 0.61stat) × 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
Published: 2018

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

Author: Federal Ministry of Education and Research (Germany), Max Planck Society, Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, Junta de Andalucía, MAGIC Collaboration, Acciari, Victor, Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babi¿, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Nishijima, K., Vanzo, G., Noda, K., Nogués, L., Fernández-Barral, Asunción, Sobczynska, D., Somero, A., Barrio, J. A., Domínguez, A., Kiehlmann, S., Biland, A., Paredes, Josep M., Becerra González, J., Fallah Ramazani, V., Pedaletti, G., Ceribella, G., Thum, C., García, J. R, Max-Moerbeck, W., Rhode, W., Ribó, Marc, Guberman, D., Vázquez Acosta, M., Vovk, I., Cortina, J., Galindo, D., Casadio, C., Saito, T., Agudo, Iván, Giammaria, P., Bernardini, E., Do Souto Espiñera, E., Blanch, O., Stamerra, A., Traianou, E., Strzys, M., Surić, T., Tornikoski, Merja, Bhattacharyya, W., Elsaesser, D., Nievas Rosillo, M., Colak, S.M., Teshima, M., Bonnoli, G., Kushida, J., D'Elia, V., Fruck, Christian, Ward, J. E., Colin, P., Besenrieder, J., Will, M., Bigongiari, C., de Angelis, A., Gaug, Markus, Prada Moroni, P. G., Dominis Prester, D., Raiteri, C.M., Makariev, M., Fattorini, A., Hrupec, D., Lähteenmäki, Anne, Dorner, D., Dazzi, F., Tammi, J., de Lotto, B., Ferrara, G., Kubo, H., Gallozzi, S., Molina, Sol, Mirzoyan, R., Godinović, N., Longo, F., Myserlis, I., García López, R. J., Neustroev, V., Kim, J. Y., Fidalgo, Darío, Majumdar, P., Inoue, S., Carosi, R., Palacio, J., Kuveždi¿, D., Martínez, M., Colombo, E., Ishio, K., Peresano, M., Contreras, J.L., Miranda, J. M., López, M., Delfino, M., Lamastra, A., Delgado, J., di Pierro, F., Šnidari¿, I., Hadasch, D., Hahn, A., Munar-Adrover, P., Righi, C., Maneva, G., Doro, M., López-Oramas, A., Schweizer, T., Einecke, S., Paiano, S., Masuda, S., Foffano, L., Manganaro, M., Fonseca, M.V., Font, L., Lelas, D., Leone, F., Peñil, P., Berti, A., Molina, E., Garczarczyk, M., Mazin, D., Tsujimoto, S., Niedzwiecki, A., Rico, J., Hassan, T., Moralejo, A., Herrera, J., Hoang, J., Mannheim, K., Nilsson, Kari, Satalecka, K., Da Vela, Paolo, Paneque, D., Iwamura, Y., Hovatta, T., Persic, M., Tavecchio, F., Lindfors, E., Paoletti, R., Nigro, C., Lombardi, S., Ninci, D., Prandini, E., Torres-Albà, N., Rugliancich, A., Maggio, C., Fuentes, A., Sitarek, J., Zari¿, D., Maraschi, L., Saha, L., Bednarek, Wlodek, Mariotti, M., Puljak, I., Sandrinelli, A., Temnikov, P., Minev, M., Cikota, S., van Scherpenberg, J., Ramakrishnan, V., Moreno, Vicente, Terzi¿, T., Covino, Stefano, Moretti, E., Gómez, José L., Fermi-LAT Collaboration, Federal Ministry of Education and Research (Germany), Max Planck Society, Ministerio de Economía y Competitividad (España), Swiss National Science Foundation, Junta de Andalucía, MAGIC Collaboration, Acciari, Victor, Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Arcaro, C., Baack, D., Babi¿, A., Banerjee, B., Bangale, P., Barres de Almeida, U., Nishijima, K., Vanzo, G., Noda, K., Nogués, L., Fernández-Barral, Asunción, Sobczynska, D., Somero, A., Barrio, J. A., Domínguez, A., Kiehlmann, S., Biland, A., Paredes, Josep M., Becerra González, J., Fallah Ramazani, V., Pedaletti, G., Ceribella, G., Thum, C., García, J. R, Max-Moerbeck, W., Rhode, W., Ribó, Marc, Guberman, D., Vázquez Acosta, M., Vovk, I., Cortina, J., Galindo, D., Casadio, C., Saito, T., Agudo, Iván, Giammaria, P., Bernardini, E., Do Souto Espiñera, E., Blanch, O., Stamerra, A., Traianou, E., Strzys, M., Surić, T., Tornikoski, Merja, Bhattacharyya, W., Elsaesser, D., Nievas Rosillo, M., Colak, S.M., Teshima, M., Bonnoli, G., Kushida, J., D'Elia, V., Fruck, Christian, Ward, J. E., Colin, P., Besenrieder, J., Will, M., Bigongiari, C., de Angelis, A., Gaug, Markus, Prada Moroni, P. G., Dominis Prester, D., Raiteri, C.M., Makariev, M., Fattorini, A., Hrupec, D., Lähteenmäki, Anne, Dorner, D., Dazzi, F., Tammi, J., de Lotto, B., Ferrara, G., Kubo, H., Gallozzi, S., Molina, Sol, Mirzoyan, R., Godinović, N., Longo, F., Myserlis, I., García López, R. J., Neustroev, V., Kim, J. Y., Fidalgo, Darío, Majumdar, P., Inoue, S., Carosi, R., Palacio, J., Kuveždi¿, D., Martínez, M., Colombo, E., Ishio, K., Peresano, M., Contreras, J.L., Miranda, J. M., López, M., Delfino, M., Lamastra, A., Delgado, J., di Pierro, F., Šnidari¿, I., Hadasch, D., Hahn, A., Munar-Adrover, P., Righi, C., Maneva, G., Doro, M., López-Oramas, A., Schweizer, T., Einecke, S., Paiano, S., Masuda, S., Foffano, L., Manganaro, M., Fonseca, M.V., Font, L., Lelas, D., Leone, F., Peñil, P., Berti, A., Molina, E., Garczarczyk, M., Mazin, D., Tsujimoto, S., Niedzwiecki, A., Rico, J., Hassan, T., Moralejo, A., Herrera, J., Hoang, J., Mannheim, K., Nilsson, Kari, Satalecka, K., Da Vela, Paolo, Paneque, D., Iwamura, Y., Hovatta, T., Persic, M., Tavecchio, F., Lindfors, E., Paoletti, R., Nigro, C., Lombardi, S., Ninci, D., Prandini, E., Torres-Albà, N., Rugliancich, A., Maggio, C., Fuentes, A., Sitarek, J., Zari¿, D., Maraschi, L., Saha, L., Bednarek, Wlodek, Mariotti, M., Puljak, I., Sandrinelli, A., Temnikov, P., Minev, M., Cikota, S., van Scherpenberg, J., Ramakrishnan, V., Moreno, Vicente, Terzi¿, T., Covino, Stefano, Moretti, E., Gómez, José L., and Fermi-LAT Collaboration
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
Published: 2018

13. 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

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

Subjects: Gamma rays: galaxies, Quasars: individual: PKS 1510-089, ta115, Galaxies: jets, Galaxies: active
Published: 2018

15. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

Subjects: Gamma rays: galaxies, Quasars: individual: PKS 1510-089, ta115, Galaxies: jets, Galaxies: active
Published: 2017

16. PROBING THE INNER JET OF THE QUASAR PKS 1510-089 WITH MULTI-WAVEBAND MONITORING DURING STRONG GAMMA-RAY ACTIVITY

Subjects: radio continuum: galaxies, polarization, X-rays: galaxies, ta115, ta213, gamma rays: general, quasars: individual: PKS 1510-089
Published: 2010

17. Fermi Large Area Telescope and Multi-wavelength Observations of the Flaring Activity of PKS 1510-089 between 2008 September and 2009 June

Subjects: ta115, ta213, galaxies: active, gamma rays: galaxies, quasars: individual: PKS 1510-089, galaxies: jets
Published: 2010

18. PKS 1510-089: a rare example of a flat spectrum radio quasar with a very high-energy emission

Author: Pierre Brun, Anna Barnacka, Rafal Moderski, Stefan Wagner, B. Behera, Copernicus Astronomical Center of the Polish Academy of Sciences (CAMK), Polish Academy of Sciences (PAN), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, Département de Physique des Particules (ex SPP) (DPP), 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, Landessternwarte Königstuhl [ZAH] (LSW), Universität Heidelberg [Heidelberg], Part of this work was supported by the French national Program for High-Energy Astrophysics PNHE, and the French ANR project CosmoTeV, Harvard University-Smithsonian Institution, Département de Physique des Particules (ex SPP) (DPhP), and Universität Heidelberg [Heidelberg] = Heidelberg University
Subjects: Photon, Infrared, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 0103 physical sciences, Blazar, 010303 astronomy & astrophysics, Cherenkov radiation, Line (formation), Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Astronomy and Astrophysics, Quasar, quasars: individual: PKS 1510-089, galaxies: jets, Extragalactic background light, Space and Planetary Science, ddc:520, Spectral energy distribution, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract: The blazar PKS 1510-089 is an example of flat spectrum radio quasars. High-energy emissions from this class of objects are believed to have been produced by inverse Compton radiation with seed photons originating from the broad line region. In such a paradigm, a lack of very high-energy emissions is expected because of the Klein-Nishina effect and strong absorption in the broad line region. Recent detection of at least three such blazars by Cherenkov telescopes has forced a revision of our understanding of these objects. We have aimed to model the observed spectral energy distribution of PKS 1510-089 from the high-energy flares in March 2009, during which very high-energy emission were also detected by H.E.S.S. We have applied the single-zone internal shock scenario to reproduce the multiwavelength spectrum of PKS~1510-089. We have followed the evolution of the electrons as they propagate along the jet and emit synchrotron and inverse Compton radiation. We have considered two sources of external photons: the dusty torus and the broad line region. We have also examined the effects of the gamma-gamma absorption of the high-energy photons both in the AGN environment (the broad line region and the dusty torus), as well as while traveling over cosmological distances: the extragalactic background light. We have successfully modeled the observed spectrum of PKS 1510-089. In our model, the highest energy emission is the result of the Comptonization of the infrared photons from the dusty torus, thus avoiding Klein-Nishina regime, while the bulk of the emissions in the GeV range may still be dominated by the Comptonization of radiation coming from the broad line region., Comment: Accepted for publication in A&A
Published: 2014

19. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Subjects: Quasars: individual: PKS 1510-089, Gamma rays: galaxies, Galaxies: jets, Galaxies: active
Published: 2014

20. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Author: Aleksic, J., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Bangale, P., Bednarek, W., Bernardini, E., Biland, A., Blanch, O., Bonnefoy, S., Contreras, J. L., Paneque, D., Paoletti, R., Cortina, J., Paredes, J. M., Covino, S., Paredes-Fortuny, X., Da, Vela P., Partini, S., Dazzi, F., Persic, M., De, Angelis A., Prada, F., De, Caneva G., PradaMoroni, P. G., De, Lotto B., Prandini, E., Delgado, Mendez C., Preziuso, S., Doert, M., Bonnoli, G., Dominguez, A., Puljak, I., Reinthal, R., Dominis, Prester D., Rhode, W., Dorner, D., Ribo, M., Doro, M., Rico, J., Einecke, S., Eisenacher, D., Elsaesser, D., Farina, E., Ferenc, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Garcia, Lopez R. J., Rodriguez, Garcia J., Garczarczyk, M., Garrido, Terrats D., Gaug, M., Godinovic, N., Gonzalez, Munoz A., Gozzini, S. R., Hadasch, D., Herrera, J., Herrero, A., Rugamer, S., Hildebrand, D., Hose, J., Hrupec, D., Idec, W., Kadenius, V., Kellermann, H., Kodani, K., Konno, Y., Krause, J., Kubo, H., Saggion, A., Kushida, J., La, Barbera A., Lelas, D., Lewandowska, N., Lindfors, E., Lombardi, S., Lopez, M., Lopez-Coto, R., Lopez-Oramas, A., Lorenz, E., Saito, T., Lozano, I., Makariev, M., Mallot, K., Maneva, G., Mankuzhiyil, N., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martinez, M., Saito, K., Mazin, D., Menzel, U., Meucci, M., Miranda, J. M., Mirzoyan, R., Moralejo, A., Munar-Adrover, P., Nakajima, D., Niedzwiecki, A., Nilsson, K., Borracci, F., Nishijima, K., Noda, K., Nowak, N., Orito, R., Overkemping, A., Paiano, S., Palatiello, M., Satalecka, K., Scalzotto, V., Scapin, V., Schultz, C., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Bretz, T., Spanier, F., Stamatescu, V., Stamerra, A., Steinbring, T., Storz, J., Strzys, M., Sun, S., Suric, T., Takalo, L., Takami, H., Carmona, E., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Thaele, J., Tibolla, O., Torres, D. F., Toyama, T., Treves, A., Carosi, A., Uellenbeck, M., Vogler, P., Wagner, R. M., Zandanel, F., Zanin, R., Lucarelli, F., Pittori, C., Vercellone, S., Verrecchia, F., Buson, S., Carreto, Fidalgo D., D'Ammando, F., Stawarz, Lukasz, Colin, P., Colombo, E., Hayashida, Masaaki, Barres, de Almeida U., Barrio, J. A., Becerra, Gonzalez J., Department of Radio Science and Engineering, Aalto-yliopisto, Aalto University, Aleksic J, Ansoldi S, Antonelli LA, Antoranz P, Babic A, Bangale P, de Almeida UB, Barrio JA, Gonzalez JB, Bednarek W, Bernardini E, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bratz T, Carmona E, Carosi A, Fidalgo DC, Colin P, Colombo E, Contreras JL, Cortina I, Covino S, Da Vela P, Dazzi F, De Angelis A, De Caneva G, De Lotto B, Mendez CD, Doert M, Dominguez A, Presters DD, Dorner D, Doro M, Einecke S, Eisenacher D, Elsaesser D, Farina E, Ferenc D, Fonseca MV, Font L, Frantzen K, Fruck C, Lopez RJG, Garczarczyk M, Terrats DG, Gaug M, Godinovic N, Munoz AG, Gozzini SR, Hadasch D, Hayashida M, Herrera J, Herrero A, Hildebrand D, Hose J, Hrupec D, Idec W, Kadenius V, Kellermann H, Kodani K, Konno Y, Krause J, Kubo H, Kushida J, La Barbera A, Lelas D, Lewandowska N, Lindfors E, Lombardi S, Lopez M, Lopez-Coto R, Lopez-Oramas A, Lorenz E, Lozano I, Makariev M, Mallotw K, Maneva G, Mankuzhiyil N, Mannheim K, Maraschi L, Marcote B, Mariotti M, Martinez M, Mazin D, Menzel U, Meucci M, Miranda JM, Mirzoyan R, Moralejo A, Munar-Adrover P, Nakajima D, Niedzwiecki A, Nilsson K, Nishijima K, Noda K, Nowak N, Orito R, Overkemping A, Paiano S, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Partini S, Persic M, Prada F, Moroni PGP, Prandini E, Preziuso S, Puljak I, Reinthal R, Rhode W, Ribo M, Rico J, Garcia JR, Rugamer S, Saggion A, Saito T, Saito K, Satalecka K, Scalzotto V, Scapin V, Schultz C, Schweizer T, Shore SN, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Spanier F, Stamatescu V, Stamerra A, Steinbring T, Storz J, Strzys M, Sun S, Suric T, Takalo L, Takami H, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Thaele J, Tibolla O, Torres DF, Toyama T, Treves A, Uellenbeck M, Vogler P, Wagner RM, Zandanel F, Zanin R, Lucarelli F, Pittori C, Vercellone S, Verrecchia F, Buson S, DAmmando F, Stawarz L, Giroletti M, Orienti M, Mundell C, Steele I, Zarpudin B, Raiteri CM, Villata M, Sandrinelli A, Lahteenmaki A, Tammi J, Tornikoski M, Hovatta T, Readhead ACS, Max-Moerbeck W, Richards JL, Jorstad S, Marscher A, Gurwell MA, Larionov VM, Blinov DA, Konstantinova TS, Kopatskaya EN, Larionova LV, Earionova EG, Morozova DA, Troitky IS, Mokrushina AA, Pavlova YV, Chen WP, Lin HC, Panwar N, Agudo I, Casadio C, Gomez JL, Molina SN, Kurtanidze OM, Nikolashvili MG, Kurtanidze SO, Chigladze RA, Acosta-Pulido JA, Carnerero MI, Manilla-Robles A, Ovcharov E, Bozhilov V, Metodieva I, Aller MF, Aller HD, Fuhrman L, Angelakis E, Nestoras I, Krichbaue TP, Zensue JA, Ungerechts H, and Sievers A
Subjects: ACTIVE GALACTIC NUCLEI, LARGE-AREA TELESCOPE, HIGH-ENERGY EMISSION, BASE-LINE ARRAY, BLAZAR 3C 279, MULTIWAVELENGTH OBSERVATIONS, X-RAY, POLARIMETRIC OBSERVATIONS, BACKGROUND-RADIATION, HIGH-FREQUENCIES, galaxies [Gamma rays], galaxies: active, galaxies: jets, gamma rays: galaxies, quasars: individual: PKS1510-089, Astrophysics, 01 natural sciences, QD, MAGIC (telescope), 010303 astronomy & astrophysics, QC, QB, High Energy Astrophysical Phenomena (astro-ph.HE), astro-ph.HE, Physics, Galaxies: active, Gamma rays: galaxies, Spectral energy distribution, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Galaxies: jets, Quasars: individual: PKS 1510-089, Astronomy and Astrophysics, Space and Planetary Science, active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, galaxies: active / galaxies: jets / gamma rays: galaxies / quasars: individual: PKS 1510-089, Radio spectrum, 0103 physical sciences, individual: PKS 1510-089 [Quasars], Blazar, Very Long Baseline Array, 010308 nuclear & particles physics, Compton scattering, Quasar, ddc:520, jets [Galaxies], Fermi Gamma-ray Space Telescope
Abstract: 著者人数: 219名, Accepted: 2014-05-30, 資料番号: SA1140143000
Published: 2014

21. Multi-epoch parsec-scale observations of the blazar PKS 1510-089

Author: Orienti, M., Venturi, T., Dallacasa, D., D'Ammando, F., Giroletti, M., Giovannini, G., Vercellone, S., Tavani, M., Orienti M., Venturi T., Dallacasa D., D'Ammando F., Giroletti M., Giovannini G., Vercellone S., and Tavani M.
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), POLARIZATION, Astrophysics::High Energy Astrophysical Phenomena, RADIO CONTINUUM: GENERAL, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, QUASARS: INDIVIDUAL: PKS 1510-089, Astrophysics::Galaxy Astrophysics, RADIATION MECHANISMS: NON-THERMAL, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: (Abridged) We investigate the flux density variability and changes in the parsec-scale radio structure of the flat spectrum radio quasar PKS 1510-089. This source was target of multi-epoch VLBI and Space-VLBI observations at 4.8, 8.4 and 22 GHz carried out between 1999 and 2001. The comparison of the parsec-scale structure observed at different epochs shows the presence of a non-stationary jet feature moving with a superluminal apparent velocity of 16.2c+-0.7c. Over three epochs at 8.4 GHz during this period the core flux density varies of about 50%, while the scatter in the jet flux density is within 10%. The polarization percentage of both core and jet components significantly change from 2 to 9 per cent, while the polarization angle of the core shows an abrupt change of about 90 degrees becoming roughly perpendicular to the jet direction, consistent with a change in the opacity. To complete the picture of the physical processes at work, we complemented our observations with multi-epoch VLBA data at 15 GHz from the MOJAVE programme spanning a time baseline from 1995 to 2010. Since 1995 jet components are ejected roughly once per year with the same position angle and an apparent speed between 15c and 20c, indicating that no jet precession is taking place on a timescale longer than a decade in our frame. The variability of the total intensity flux density together with variations in the polarization properties may be explained assuming either a change between the optically-thick and -thin regimes produced by a shock that varies the opacity, or a highly ordered magnetic field produced by the compression of the relativistic plasma by a shock propagating along the jet. Taking into account the high gamma-ray emission observed from this source by the AGILE and Fermi satellites we investigated the connection between the radio and gamma-ray activity during 2007-2010., Comment: 12 pages, 13 figures; accepted for publication in MNRAS
Published: 2011

22. AGILE detection of extreme \gamma-ray activity from the blazar PKS 1510-089 during March 2009. Multifrequency analysis

Author: A. Di Paola, Mark Gurwell, L. Fuhrmann, Jochen Heidt, C. Pittori, T. Froysland, G. De Paris, M. Pasanen, Elena Pian, Tatiana S. Konstantinova, A. Rubini, Sofia O. Kurtanidze, I. M. McHardy, F. Fuschino, L. Pacciani, Sandro Mereghetti, D. A. Morozova, A. A. Arkharov, Uwe Bach, Corrado Trigilio, I. Donnarumma, P. Lipari, A. Zambra, Geiland Porrovecchio, I. Agudo, M. F. Aller, M. Feroci, Merja Tornikoski, G. Piano, Y. Evangelista, Claudio Labanti, G. Umana, Filippo D'Ammando, Carla Buemi, H. A. Krimm, S. Colafrancesco, M. Fiorini, F. Perotti, Stefano Covino, Fulvio Gianotti, E. Del Monte, G. Pucella, A. Rappoldi, Andrei Berdyugin, D. Zanello, Svetlana G. Jorstad, P. Caraveo, B. McBreen, I. S. Troitsky, Paolo Leto, A. Argan, E. Forné, F. Boffelli, Talvikki Hovatta, Erika Benítez, A. Sillanpää, P. Picozza, Arnaud Ferrari, L. Salotti, V. Vittorini, Kari Nilsson, A. Morselli, E. Striani, L. A. Antonelli, Andrea Bulgarelli, Wen Ping Chen, B. Jordan, P. Santolamazza, G. Di Cocco, Givi N. Kimeridze, M. Rapisarda, Massimo Frutti, S. Sabatini, I. Lapshov, F. Lazzarotto, A. Pellizzoni, E. Costa, Martino Marisaldi, M. Tavani, E. Vallazza, C. M. Raiteri, A. Trois, M. Pilia, H. Y. Hsiao, Omar M. Kurtanidze, Valeri M. Larionov, M. Prest, M. Roca-Sogorb, A. W. Chen, P. W. Cattaneo, P. Soffitta, Hugh D. Aller, V. Cocco, A. Giuliani, M. Orienti, M. Villata, Mauro Dolci, M. Trifoglio, Elina Lindfors, J. L. Gomez, P. Romano, Alan P. Marscher, P. Giommi, Anne Lähteenmäki, David Hiriart, G. Barbiellini, Ekaterina Koptelova, G. Giovannini, F. Longo, S. Vercellone, L. O. Takalo, E. N. Kopatskaya, M. Galli, F. Verrecchia, D. Blinov, F., D'Ammando, C. M., Raiteri, M., Villata, P., Romano, G., Pucella, H. A., Krimm, S., Covino, M., Orienti, G., Giovannini, S., Vercellone, E., Pian, I., Donnarumma, V., Vittorini, M., Tavani, A., Argan, G., Barbiellini, F., Boffelli, A., Bulgarelli, P., Caraveo, P. W., Cattaneo, A. W., Chen, V., Cocco, E., Costa, Monte, E., Paris, G., Cocco, G., Y., Evangelista, M., Feroci, A., Ferrari, M., Fiorini, T., Froysland, M., Frutti, F., Fuschino, M., Galli, F., Gianotti, A., Giuliani, C., Labanti, I., Lapshov, F., Lazzarotto, P., Lipari, Longo, Francesco, M., Marisaldi, S., Mereghetti, A., Morselli, L., Pacciani, A., Pellizzoni, F., Perotti, G., Piano, P., Picozza, M., Pilia, G., Porrovecchio, M., Prest, M., Rapisarda, A., Rappoldi, A., Rubini, S., Sabatini, P., Soffitta, E., Striani, M., Trifoglio, A., Troi, E., Vallazza, A., Zambra, D., Zanello, I., Agudo, H. D., Aller, M. F., Aller, A. A., Arkharov, U., Bach, E., Benitez, A., Berdyugin, D. A., Blinov, C. S., Buemi, W. P., Chen, Paola, A., M., Dolci, E., Forne, L., Fuhrmann, J. L., Gomez, M. A., Gurwell, B., Jordan, S. G., Jorstad, J., Heidt, D., Hiriart, T., Hovatta, H. Y., Hsiao, G., Kimeridze, T. S., Konstantinova, E. N., Kopatskaya, E., Koptelova, O. M., Kurtanidze, S. O., Kurtanidze, V. M., Larionov, A., L\ahteenm\aki, P., Leto, E., Lindfor, A. P., Marscher, B., Mcbreen, I. M., Mchardy, D. A., Morozova, K., Nilsson, M., Pasanen, M., Roca Sogorb, A., Sillanp\a\a, L. O., Takalo, M., Tornikoski, C., Trigilio, I. S., Troitsky, G., Umana, L. A., Antonelli, S., Colafrancesco, C., Pittori, P., Santolamazza, F., Verrecchia, P., Giommi, L., Salotti, Anne Lähteenmäki Group, Aalto-yliopisto, and Aalto University
Subjects: Photon, Astrophysics::High Energy Astrophysical Phenomena, education, galaxies: active, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Spectral line, law.invention, law, quasars: general, 0103 physical sciences, individual: PKS 1510-089 [quasars], Electronic band structure, Blazar, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, general [quasars], 010308 nuclear & particles physics, Gamma ray, Astronomy and Astrophysics, gamma rays: general, quasars: individual: PKS 1510-089, radiation mechanisms: non-thermal, non-thermal [radiation mechanisms], Synchrotron, Space and Planetary Science, active [galaxies], Peak level, Astrophysics - High Energy Astrophysical Phenomena, general [gamma rays], Flare
Abstract: We report on the extreme gamma-ray activity from the FSRQ PKS 1510-089 observed by AGILE in March 2009. In the same period a radio-to-optical monitoring of the source was provided by the GASP-WEBT and REM. Moreover, several Swift ToO observations were triggered, adding important information on the source behaviour from optical/UV to hard X-rays. We paid particular attention to the calibration of the Swift/UVOT data to make it suitable to the blazars spectra. Simultaneous observations from radio to gamma rays allowed us to study in detail the correlation among the emission variability at different frequencies and to investigate the mechanisms at work. In the period 9-30 March 2009, AGILE detected an average gamma-ray flux of (311+/-21)x10^-8 ph cm^-2 s^-1 for E>100 MeV, and a peak level of (702+/-131)x10^-8 ph cm^-2 s^-1 on daily integration. The gamma-ray activity occurred during a period of increasing activity from near-IR to UV, with a flaring episode detected on 26-27 March 2009, suggesting that a single mechanism is responsible for the flux enhancement observed from near-IR to UV. By contrast, Swift/XRT observations seem to show no clear correlation of the X-ray fluxes with the optical and gamma-ray ones. However, the X-ray observations show a harder photon index (1.3-1.6) with respect to most FSRQs and a hint of harder-when-brighter behaviour, indicating the possible presence of a second emission component at soft X-ray energies. Moreover, the broad band spectrum from radio-to-UV confirmed the evidence of thermal features in the optical/UV spectrum of PKS 1510-089 also during high gamma-ray state. On the other hand, during 25-26 March 2009 a flat spectrum in the optical/UV energy band was observed, suggesting an important contribution of the synchrotron emission in this part of the spectrum during the brightest gamma-ray flare, therefore a significant shift of the synchrotron peak., 13 pages, 7 figures, 3 tables. Accepted for publication in Astronomy and Astrophysics
Published: 2011

23. H.E.S.S. discovery of VHE y-rays from the quasar PKS 1510-089

Author: 11005394 - Krüger, Petrus Paulus, 12006653 - Venter, Christo, 22050574 - Pekeur, Nicolette Whilna, 12792322 - Vorster, Michael Johannes, 22164405 - Sheidaei, Farzaneh, 23909196 - Casanova, Sabrina, Abramowski, A., Casanova, S., Krüger, P.P., Pekeur, N.W., Sheidaei, F., Venter, C., Vorster, M., H.E.S.S. Collaboration, 11005394 - Krüger, Petrus Paulus, 12006653 - Venter, Christo, 22050574 - Pekeur, Nicolette Whilna, 12792322 - Vorster, Michael Johannes, 22164405 - Sheidaei, Farzaneh, 23909196 - Casanova, Sabrina, Abramowski, A., Casanova, S., Krüger, P.P., Pekeur, N.W., Sheidaei, F., Venter, C., Vorster, M., and H.E.S.S. Collaboration
Abstract: The quasar PKS 1510-089 (z = 0.361) was observed with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes during high states in the optical and GeV bands, to search for very high energy (VHE, defined as E ≥ 0.1 TeV) emission. VHE γ-rays were detected with a statistical significance of 9.2 standard deviations in 15.8 h of H.E.S.S. data taken during March and April 2009. A VHE integral flux of I(0.15 TeV < E < 1.0TeV) = (1.0 ± 0.2stat ± 0.2sys) × 10−11 cm−2 s−1 is measured. The best-fit power law to the VHE data has a photon index of Γ = 5.4 ± 0.7stat ± 0.3sys. The GeV and optical light curves show pronounced variability during the period of H.E.S.S. observations. However, there is insufficient evidence to claim statistically significant variability in the VHE data. Because of its relatively high redshift, the VHE flux from PKS 1510−089 should suffer considerable attenuation in the intergalactic space due to the extragalactic background light (EBL). Hence, the measured γ-ray spectrum is used to derive upper limits on the opacity due to EBL, which are found to be comparable with the previously derived limits from relatively-nearby BL Lac objects. Unlike typical VHE-detected blazars where the broadband spectrum is dominated by nonthermal radiation at all wavelengths, the quasar PKS 1510−089 has a bright thermal component in the optical to UV frequency band. Among all VHE detected blazars, PKS 1510−089 has the most luminous broad line region. The detection of VHE emission from this quasar indicates a low level of γ − γ absorption on the internal optical to UV photon field.
Published: 2013

24. HESS discovery of VHE gamma-rays from the quasar PKS 1510-089

Author: Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A. G., Anton, G., Balenderan, S., Balzer, A., Barnacka, A., Becherini, Y., Tjus, J. Becker, Behera, B., Bernloehr, K., Birsin, E., Biteau, J., Bochow, A., Boisson, C., Bolmont, J., Bordas, P., Brucker, J., Brun, F., Brun, P., Bulik, T., Carrigan, S., Casanova, S., Cerruti, M., Chadwick, P. M., Chaves, R. C. G., Cheesebrough, A., Colafrancesco, S., Cologna, G., Conrad, Jan, Couturier, C., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., deWilt, P., Dickinson, Hugh J., Djannati-Atai, A., Domainko, W., Drury, L. O 'C., Dubus, G., Dutson, K., Dyks, J., Dyrda, M., Egberts, K., Eger, P., Espigat, P., Fallon, L., Farnier, Christian, Fegan, S., Feinstein, F., Fernandes, M. V., Fernandez, D., Fiasson, A., Fontaine, G., Foester, A., Fuessling, M., Gajdus, M., Gallant, Y. A., Garrigoux, T., Gast, H., Giebels, B., Glicenstein, J. F., Glueck, B., Goeing, D., Grondin, M. -H, Grudzinska, M., Haeffner, S., Hague, J. D., Hahn, J., Hampf, D., Harris, J., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hillert, A., Hinton, J. A., Hofmann, W., Hofverberg, P., Holler, M., Horns, D., Jacholkowska, A., Jahn, C., Jamrozy, M., Jung, I., Kastendieck, M. A., Katarzynski, K., Katz, U., Kaufmann, S., Khelifi, B., Klepser, S., Klochkov, D., Kluzniak, W., Kneiske, T., Komin, Nu., Kosack, K., Kossakowski, R., Krayzel, F., Krueger, P. P., Laffon, H., Lamanna, G., Lefaucheur, J., Lemoine-Goumard, M., Lenain, J. -P, Lennarz, D., Lohse, T., Lopatin, A., Lu, C. -C, Marandon, V., Marcowith, A., Masbou, J., Maurin, G., Maxted, N., Mayer, M., McComb, T. J. L., Medina, M. C., Mehault, J., Menzler, U., Moderski, R., Mohamed, M., Moulin, E., Naumann, C. L., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nguyen, N., Niemiec, J., Nolan, S. J., Ohm, S., Wilhelmi, E. de Ona, Opitz, B., Ostrowski, M., Oya, I., Panter, M., Parsons, R. D., Arribas, M. Paz, Pekeur, N. W., Pelletier, G., Perez, J., Petrucci, P. -O, Peyaud, B., Pita, S., Puehlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Raue, M., Reimer, A., Reimer, O., Renaud, M., de los Reyes, R., Rieger, F., Ripken, Joachim, Rob, L., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Sahakian, V., Sanchez, D. A., Santangelo, A., Schlickeiser, R., Schulz, A., Schwanke, U., Schwarzburg, S., Schwemmer, S., Sheidaei, F., Skilton, J. L., Sol, H., Spengler, G., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Stycz, K., Sushch, I., Szostek, A., Tavernet, J. -P, Terrier, R., Tluczykont, M., Trichard, C., Valerius, K., van Eldik, C., Vasileiadis, G., Venter, C., Viana, A., Vincent, P., Voelk, H. J., Volpe, F., Vorobiov, S., Vorster, M., Wagner, S. J., Ward, M., White, R., Wierzcholska, A., Wouters, D., Zacharias, M., Zajczyk, A., Zdziarski, A. A., Zech, A., Zechlin, H. S., Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A. G., Anton, G., Balenderan, S., Balzer, A., Barnacka, A., Becherini, Y., Tjus, J. Becker, Behera, B., Bernloehr, K., Birsin, E., Biteau, J., Bochow, A., Boisson, C., Bolmont, J., Bordas, P., Brucker, J., Brun, F., Brun, P., Bulik, T., Carrigan, S., Casanova, S., Cerruti, M., Chadwick, P. M., Chaves, R. C. G., Cheesebrough, A., Colafrancesco, S., Cologna, G., Conrad, Jan, Couturier, C., Dalton, M., Daniel, M. K., Davids, I. D., Degrange, B., Deil, C., deWilt, P., Dickinson, Hugh J., Djannati-Atai, A., Domainko, W., Drury, L. O 'C., Dubus, G., Dutson, K., Dyks, J., Dyrda, M., Egberts, K., Eger, P., Espigat, P., Fallon, L., Farnier, Christian, Fegan, S., Feinstein, F., Fernandes, M. V., Fernandez, D., Fiasson, A., Fontaine, G., Foester, A., Fuessling, M., Gajdus, M., Gallant, Y. A., Garrigoux, T., Gast, H., Giebels, B., Glicenstein, J. F., Glueck, B., Goeing, D., Grondin, M. -H, Grudzinska, M., Haeffner, S., Hague, J. D., Hahn, J., Hampf, D., Harris, J., Hauser, M., Heinz, S., Heinzelmann, G., Henri, G., Hermann, G., Hillert, A., Hinton, J. A., Hofmann, W., Hofverberg, P., Holler, M., Horns, D., Jacholkowska, A., Jahn, C., Jamrozy, M., Jung, I., Kastendieck, M. A., Katarzynski, K., Katz, U., Kaufmann, S., Khelifi, B., Klepser, S., Klochkov, D., Kluzniak, W., Kneiske, T., Komin, Nu., Kosack, K., Kossakowski, R., Krayzel, F., Krueger, P. P., Laffon, H., Lamanna, G., Lefaucheur, J., Lemoine-Goumard, M., Lenain, J. -P, Lennarz, D., Lohse, T., Lopatin, A., Lu, C. -C, Marandon, V., Marcowith, A., Masbou, J., Maurin, G., Maxted, N., Mayer, M., McComb, T. J. L., Medina, M. C., Mehault, J., Menzler, U., Moderski, R., Mohamed, M., Moulin, E., Naumann, C. L., Naumann-Godo, M., de Naurois, M., Nedbal, D., Nguyen, N., Niemiec, J., Nolan, S. J., Ohm, S., Wilhelmi, E. de Ona, Opitz, B., Ostrowski, M., Oya, I., Panter, M., Parsons, R. D., Arribas, M. Paz, Pekeur, N. W., Pelletier, G., Perez, J., Petrucci, P. -O, Peyaud, B., Pita, S., Puehlhofer, G., Punch, M., Quirrenbach, A., Raab, S., Raue, M., Reimer, A., Reimer, O., Renaud, M., de los Reyes, R., Rieger, F., Ripken, Joachim, Rob, L., Rosier-Lees, S., Rowell, G., Rudak, B., Rulten, C. B., Sahakian, V., Sanchez, D. A., Santangelo, A., Schlickeiser, R., Schulz, A., Schwanke, U., Schwarzburg, S., Schwemmer, S., Sheidaei, F., Skilton, J. L., Sol, H., Spengler, G., Stawarz, L., Steenkamp, R., Stegmann, C., Stinzing, F., Stycz, K., Sushch, I., Szostek, A., Tavernet, J. -P, Terrier, R., Tluczykont, M., Trichard, C., Valerius, K., van Eldik, C., Vasileiadis, G., Venter, C., Viana, A., Vincent, P., Voelk, H. J., Volpe, F., Vorobiov, S., Vorster, M., Wagner, S. J., Ward, M., White, R., Wierzcholska, A., Wouters, D., Zacharias, M., Zajczyk, A., Zdziarski, A. A., Zech, A., and Zechlin, H. S.
Abstract: The quasar PKS 1510-089 (z = 0.361) was observed with the H.E.S.S. array of imaging atmospheric Cherenkov telescopes during high states in the optical and GeV bands, to search for very high energy (VHE, defined as E >= 0.1 TeV) emission. VHE gamma-rays were detected with a statistical significance of 9.2 standard deviations in 15.8 h of H. E. S. S. data taken during March and April 2009. A VHE integral flux of I(0.15 TeV < E < 1.0TeV) = (1.0 +/- 0.2(stat) +/- 0.2(sys)) x 10(-11) cm(-2) s(-1) is measured. The best-fit power law to the VHE data has a photon index of G = 5.4 +/- 0.7(stat) +/- 0.3(sys). The GeV and optical light curves show pronounced variability during the period of H.E.S.S. observations. However, there is insufficient evidence to claim statistically significant variability in the VHE data. Because of its relatively high redshift, the VHE flux from PKS 1510-089 should suffer considerable attenuation in the intergalactic space due to the extragalactic background light (EBL). Hence, the measured gamma-ray spectrum is used to derive upper limits on the opacity due to EBL, which are found to be comparable with the previously derived limits from relatively-nearby BL Lac objects. Unlike typical VHE-detected blazars where the broadband spectrum is dominated by nonthermal radiation at all wavelengths, the quasar PKS 1510-089 has a bright thermal component in the optical to UV frequency band. Among all VHE detected blazars, PKS 1510-089 has the most luminous broad line region. The detection of VHE emission from this quasar indicates a low level of gamma - gamma absorption on the internal optical to UV photon field., AuthorCount:205
Published: 2013
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25. FERMI Large Area Telescope and multi-wavelength observations of the flaring activity of PKS 1510-089 between 2008 september and 2009 june

Author: Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Allafort, A., Aller, H.D., Aller, M. F., Antolini, E., Arkharov, A. A., Axelsson, M., Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berdyugin, A., Berenji, B., Blandford, R. D., Blinov, D. A., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buemi, C. S., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Carosati, D., Carrigan, S., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, O., Chekhtman, A., Chen, W. P., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen-Tanugi, J., Conrad, J., Corbel, S., Costamante, L., Dermer, C. D., de, Angelis A., de, Palma F., Donato, D., do, Couto e Silva E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Forne, E., Fortin, P., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gurwell, M. A., Gusbar, C., Gomez, J. L., Hadasch, D., Hagen-Thorn, V. A., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kimeridze, G., Knodlseder, J., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kovalev, Y. Y., Kurtanidze, O. M., Kuss, M., Lahteenmaki, A., Lande, J., Larionov, V. M., Larionova, E. G., Larionova, L. V., Larsson, S., Latronico, L., Lee, S.-H., Leto, P., Lister, M. L., Longo, F., Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Massaro, E., Mazziotta, M. N., McConville, W., McEnery, J. E., McHardy, I. M., Michelson, P. F., Mitthumsiri, W., Moiseev, A. A., Monte, C., Monzani, M. E., Morozova, D. A., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann-Godo, M., Nikolashvili, M. G., Nolan, P. L., Norris, J. P., Nuss, E., Omodei, N., Orlando, E., Ormes, J. F., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pelassa, V., Pepe, M., Pesce-Rollins, M., Piron, F., Porter, T. A., Pushkarev, A. B., Raino, S., Raiteri, C. M., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reinthal, R., Ripken, J., Ritz, S., Roca-Sogorb, M., Rodriguez, A. Y., Roth, M., Roustazadeh, P., Ryde, F., Sadrozinski, H. F.-W., Sander, A., Scargle, J. D., Sgro, C., Sigua, L. A., Smith, P. D., Sokolovsky, K., Spandre, G., Spinelli, P., Starck, J.-L., Strickman, M. S., Suson, D. J., Fukazawa, Y., Hayashida, M., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Mizuno, T., Ohno, Masanori, Ohsugi, T., Okumura, Akira, Ozaki, Masanobu, Takahashi, H., Takahashi, Tadayuki, Abdo, A. A., Ackermann, M., Agudo, I., Ajello, M., Allafort, A., Aller, H. D., Aller, M. F., Antolini, E., Arkharov, A. A., Axelsson, M., Bach, U., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bechtol, K., Bellazzini, R., Berdyugin, A., Berenji, B., Blandford, R. D., Blinov, D. A., Bloom, E. D., Boettcher, M., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Brigida, M., Bruel, P., Buehler, R., Buemi, C. S., Burnett, T. H., Buson, S., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Carosati, D., Carrigan, S., Casandjian, J. M., Cavazzuti, E., Cecchi, C., Celik, O., Chekhtman, A., Chen, W. P., Cheung, C. C., Chiang, J., Ciprini, S., Claus, R., Cohen Tanugi, J., Conrad, J., Corbel, S., Costamante, L., Dermer, C. D., Angelis, A. d., Palma, F. d., Donato, D., Silva, E. D. E., Drell, P. S., Dubois, R., Dumora, D., Farnier, C., Favuzzi, C., Fegan, S. J., Ferrara, E. C., Focke, W. B., Forne, E., Fortin, P., Fukazawa, Y., Funk, S., Fusco, P., Gargano, F., Gasparrini, D., Gehrels, N., Germani, S., Giebels, B., Giglietto, N., Giordano, F., Giroletti, M., Glanzman, T., Godfrey, G., Grenier, I. A., Grove, J. E., Guiriec, S., Gurwell, M. A., Gusbar, C., Gomez, J. L., Hadasch, D., Hagen Thorn, V. A., Hayashida, M., Hays, E., Horan, D., Hughes, R. E., Johannesson, G., Johnson, A. S., Johnson, W. N., Kamae, T., Katagiri, H., Kataoka, J., Kawai, N., Kimeridze, G., Knodlseder, J., Konstantinova, T. S., Kopatskaya, E. N., Koptelova, E., Kovalev, Y. Y., Kurtanidze, O. M., Kuss, M., Lahteenmaki, A., Lande, J., Larionov, V. M., Larionova, E. G., Larionova, L. V., Larsson, S., Latronico, L., Lee, S. H., Leto, P., Lister, M. L., Longo, Francesco, Loparco, F., Lott, B., Lovellette, M. N., Lubrano, P., Madejski, G. M., Makeev, A., Massaro, E., Mazziotta, M. N., Mcconville, W., Mcenery, J. E., Mchardy, I. M., Michelson, P. F., Mitthumsiri, W., Mizuno, T., Moiseev, A. A., Monte, C., Monzani, M. E., Morozova, D. A., Morselli, A., Moskalenko, I. V., Murgia, S., Naumann Godo, M., Nikolashvili, M. G., Nolan, P. L., Norris, J. P., Nuss, E., Ohno, M., Ohsugi, T., Okumura, A., Omodei, N., Orlando, E., Ormes, J. F., Ozaki, M., Paneque, D., Panetta, J. H., Parent, D., Pasanen, M., Pelassa, V., Pepe, M., Pesce Rollins, M., Piron, F., Porter, T. A., Pushkarev, A. B., Raino, S., Raiteri, C. M., Rando, R., Razzano, M., Reimer, A., Reimer, O., Reinthal, R., Ripken, J., Ritz, S., Roca Sogorb, M., Rodriguez, A. Y., Roth, M., Roustazadeh, P., Ryde, F., Sadrozinski, H. F. W., Sander, A., Scargle, J. D., Sgro, C., Sigua, L. A., Smith, P. D., Sokolovsky, K., Spandre, G., Spinelli, P., Starck, J. L., Strickman, M. S., Suson, D. J., Takahashi, H., Takahashi, T., Takalo, L. O., Tanaka, T., Taylor, B., Thayer, J. B., Thayer, J. G., Thompson, D. J., Tibaldo, L., Tornikoski, M., Torres, D. F., Tosti, G., Tramacere, A., Trigilio, C., Troitsky, I. S., Umana, G., Usher, T. L., Vandenbroucke, J., Vasileiou, V., Vilchez, N., Villata, M., Vitale, V., Waite, A. P., Wang, P., Winer, B. L., Wood, K. S., Yang, Z., Ylinen, T., and Ziegler, M.
Subjects: High Energy Gamma-ray Astronomy, Fermi satellite, Active Galactic Nuclei, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, quasars: individual (PKS 1510-089), 01 natural sciences, Luminosity, 0103 physical sciences, gamma rays: galaxies, Blazar, 010303 astronomy & astrophysics, Physics, Spectral index, 010308 nuclear & particles physics, Astronomy, Astronomy and Astrophysics, Quasar, quasars: individual: PKS 1510-089, galaxies: jets, Black hole, Photometry (astronomy), Space and Planetary Science, Astrophysics - High Energy Astrophysical Phenomena, Fermi Gamma-ray Space Telescope, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: 著者人数：217名, Accepted: 2010-07-02, 資料番号: SA1002636000
Published: 2010

26. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Author: Aleksić J., Ansoldi S., Antonelli L., Antoranz P., Babic A., Bangale P., Barres De Almeida U., Barrio J., Becerra González J., Bednarek W., Bernardini E., Biland A., Blanch O., Bonnefoy S., Bonnoli G., Borracci F., Bretz T., Carmona E., Carosi A., Carreto Fidalgo D., Colin P., Colombo E., Contreras J., Cortina J., Covino S., Da Vela P., Dazzi F., De Angelis A., De Caneva G., De Lotto B., Delgado Mendez C., Doert M., Domínguez A., Dominis Prester D., Dorner D., Doro M., Einecke S., Eisenacher D., Elsaesser D., Farina E., Ferenc D., Fonseca M., Font L., Frantzen K., Fruck C., García López R., Garczarczyk M., Garrido Terrats D., Gaug M., Godinović N., González Muñoz A., Gozzini S., Hadasch D., Hayashida M., Herrera J., Herrero A., Hildebrand D., Hose J., Hrupec D., Idec W., Kadenius V., Kellermann H., Kodani K., Konno Y., Krause J., Kubo H., Kushida J., La Barbera A., Lelas D., Lewandowska N., Lindfors E., Lombardi S., López M., López-Coto R., López-Oramas A., Lorenz E., Lozano I., Makariev M., Mallot K., Maneva G., Mankuzhiyil N., Mannheim K., Maraschi L., Marcote B., Mariotti M., Martínez M., Mazin D., Menzel U., Meucci M., Miranda J., Mirzoyan R., Moralejo A., Munar-Adrover P., Nakajima D., Niedzwiecki A., Nilsson K., Aleksić J., Ansoldi S., Antonelli L., Antoranz P., Babic A., Bangale P., Barres De Almeida U., Barrio J., Becerra González J., Bednarek W., Bernardini E., Biland A., Blanch O., Bonnefoy S., Bonnoli G., Borracci F., Bretz T., Carmona E., Carosi A., Carreto Fidalgo D., Colin P., Colombo E., Contreras J., Cortina J., Covino S., Da Vela P., Dazzi F., De Angelis A., De Caneva G., De Lotto B., Delgado Mendez C., Doert M., Domínguez A., Dominis Prester D., Dorner D., Doro M., Einecke S., Eisenacher D., Elsaesser D., Farina E., Ferenc D., Fonseca M., Font L., Frantzen K., Fruck C., García López R., Garczarczyk M., Garrido Terrats D., Gaug M., Godinović N., González Muñoz A., Gozzini S., Hadasch D., Hayashida M., Herrera J., Herrero A., Hildebrand D., Hose J., Hrupec D., Idec W., Kadenius V., Kellermann H., Kodani K., Konno Y., Krause J., Kubo H., Kushida J., La Barbera A., Lelas D., Lewandowska N., Lindfors E., Lombardi S., López M., López-Coto R., López-Oramas A., Lorenz E., Lozano I., Makariev M., Mallot K., Maneva G., Mankuzhiyil N., Mannheim K., Maraschi L., Marcote B., Mariotti M., Martínez M., Mazin D., Menzel U., Meucci M., Miranda J., Mirzoyan R., Moralejo A., Munar-Adrover P., Nakajima D., Niedzwiecki A., and Nilsson K.
Abstract: © 2014 ESO. Aims. Amongst more than fifty blazars detected in very high energy (VHE, E> 100 GeV) γ rays, only three belong to the subclass of flat spectrum radio quasars (FSRQs). The detection of FSRQs in the VHE range is challenging, mainly because of their soft spectra in the GeV-TeV regime. MAGIC observed PKS 1510-089 (z = 0.36) starting 2012 February 3 until April 3 during a high activity state in the high energy (HE, E> 100 MeV) γ-ray band observed by AGILE and Fermi. MAGIC observations result in the detection of a source with significance of 6.0 standard deviations (σ). We study the multi-frequency behaviour of the source at the epoch of MAGIC observation, collecting quasi-simultaneous data at radio and optical (GASP-WEBT and F-Gamma collaborations, REM, Steward, Perkins, Liverpool, OVRO, and VLBA telescopes), X-ray (Swift satellite), and HE γ-ray frequencies. Methods. We study the VHE γ-ray emission, together with the multi-frequency light curves, 43 GHz radio maps, and spectral energy distribution (SED) of the source. The quasi-simultaneous multi-frequency SED from the millimetre radio band to VHE γ rays is modelled with a one-zone inverse Compton model. We study two different origins of the seed photons for the inverse Compton scattering, namely the infrared torus and a slow sheath surrounding the jet around the Very Long Baseline Array (VLBA) core. Results. We find that the VHE γ-ray emission detected from PKS 1510-089 in 2012 February-April agrees with the previous VHE observations of the source from 2009 March-April. We find no statistically significant variability during the MAGIC observations on daily, weekly, or monthly time scales, while the other two known VHE FSRQs (3C 279 and PKS 1222+216) have shown daily scale to sub-hour variability. The γ-ray SED combining AGILE, Fermi and MAGIC data joins smoothly and shows no hint of a break. The multi-frequency light curves suggest a common origin for the millimetre radio and HE γ-ray emission, and the HE γ

27. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

Author: Aleksić J., Ansoldi S., Antonelli L., Antoranz P., Babic A., Bangale P., Barres De Almeida U., Barrio J., Becerra González J., Bednarek W., Bernardini E., Biland A., Blanch O., Bonnefoy S., Bonnoli G., Borracci F., Bretz T., Carmona E., Carosi A., Carreto Fidalgo D., Colin P., Colombo E., Contreras J., Cortina J., Covino S., Da Vela P., Dazzi F., De Angelis A., De Caneva G., De Lotto B., Delgado Mendez C., Doert M., Domínguez A., Dominis Prester D., Dorner D., Doro M., Einecke S., Eisenacher D., Elsaesser D., Farina E., Ferenc D., Fonseca M., Font L., Frantzen K., Fruck C., García López R., Garczarczyk M., Garrido Terrats D., Gaug M., Godinović N., González Muñoz A., Gozzini S., Hadasch D., Hayashida M., Herrera J., Herrero A., Hildebrand D., Hose J., Hrupec D., Idec W., Kadenius V., Kellermann H., Kodani K., Konno Y., Krause J., Kubo H., Kushida J., La Barbera A., Lelas D., Lewandowska N., Lindfors E., Lombardi S., López M., López-Coto R., López-Oramas A., Lorenz E., Lozano I., Makariev M., Mallot K., Maneva G., Mankuzhiyil N., Mannheim K., Maraschi L., Marcote B., Mariotti M., Martínez M., Mazin D., Menzel U., Meucci M., Miranda J., Mirzoyan R., Moralejo A., Munar-Adrover P., Nakajima D., Niedzwiecki A., Nilsson K., Aleksić J., Ansoldi S., Antonelli L., Antoranz P., Babic A., Bangale P., Barres De Almeida U., Barrio J., Becerra González J., Bednarek W., Bernardini E., Biland A., Blanch O., Bonnefoy S., Bonnoli G., Borracci F., Bretz T., Carmona E., Carosi A., Carreto Fidalgo D., Colin P., Colombo E., Contreras J., Cortina J., Covino S., Da Vela P., Dazzi F., De Angelis A., De Caneva G., De Lotto B., Delgado Mendez C., Doert M., Domínguez A., Dominis Prester D., Dorner D., Doro M., Einecke S., Eisenacher D., Elsaesser D., Farina E., Ferenc D., Fonseca M., Font L., Frantzen K., Fruck C., García López R., Garczarczyk M., Garrido Terrats D., Gaug M., Godinović N., González Muñoz A., Gozzini S., Hadasch D., Hayashida M., Herrera J., Herrero A., Hildebrand D., Hose J., Hrupec D., Idec W., Kadenius V., Kellermann H., Kodani K., Konno Y., Krause J., Kubo H., Kushida J., La Barbera A., Lelas D., Lewandowska N., Lindfors E., Lombardi S., López M., López-Coto R., López-Oramas A., Lorenz E., Lozano I., Makariev M., Mallot K., Maneva G., Mankuzhiyil N., Mannheim K., Maraschi L., Marcote B., Mariotti M., Martínez M., Mazin D., Menzel U., Meucci M., Miranda J., Mirzoyan R., Moralejo A., Munar-Adrover P., Nakajima D., Niedzwiecki A., and Nilsson K.
Abstract: © 2014 ESO. Aims. Amongst more than fifty blazars detected in very high energy (VHE, E> 100 GeV) γ rays, only three belong to the subclass of flat spectrum radio quasars (FSRQs). The detection of FSRQs in the VHE range is challenging, mainly because of their soft spectra in the GeV-TeV regime. MAGIC observed PKS 1510-089 (z = 0.36) starting 2012 February 3 until April 3 during a high activity state in the high energy (HE, E> 100 MeV) γ-ray band observed by AGILE and Fermi. MAGIC observations result in the detection of a source with significance of 6.0 standard deviations (σ). We study the multi-frequency behaviour of the source at the epoch of MAGIC observation, collecting quasi-simultaneous data at radio and optical (GASP-WEBT and F-Gamma collaborations, REM, Steward, Perkins, Liverpool, OVRO, and VLBA telescopes), X-ray (Swift satellite), and HE γ-ray frequencies. Methods. We study the VHE γ-ray emission, together with the multi-frequency light curves, 43 GHz radio maps, and spectral energy distribution (SED) of the source. The quasi-simultaneous multi-frequency SED from the millimetre radio band to VHE γ rays is modelled with a one-zone inverse Compton model. We study two different origins of the seed photons for the inverse Compton scattering, namely the infrared torus and a slow sheath surrounding the jet around the Very Long Baseline Array (VLBA) core. Results. We find that the VHE γ-ray emission detected from PKS 1510-089 in 2012 February-April agrees with the previous VHE observations of the source from 2009 March-April. We find no statistically significant variability during the MAGIC observations on daily, weekly, or monthly time scales, while the other two known VHE FSRQs (3C 279 and PKS 1222+216) have shown daily scale to sub-hour variability. The γ-ray SED combining AGILE, Fermi and MAGIC data joins smoothly and shows no hint of a break. The multi-frequency light curves suggest a common origin for the millimetre radio and HE γ-ray emission, and the HE γ

28. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

Author: Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babic, A., Banerjee, B., Bangale, P., De Almeida, U. Barres, Barrio, J. A., Bednarek, W., Bernardini, E., Berti, A., 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 Ona, Di Pierro, F., Doert, M., Dominguez, A., Prester, D. Dominis, Dorner, D., Doro, M., Einecke, S., Glawion, D. Eisenacher, Elsaesser, D., Engelkemeier, M., Ramazani, V. Fallah, Fernandez-Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Fruck, C., Galindo, D., Lopez, R. J. Garcia, 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., Hughes, G., Ishio, K., Konno, Y., Kubo, H., Kushida, J., Kuvezdic, D., Lelas, D., Lindfors, E., Lombardi, S., Longo, F., Lopez, M., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martinez, M., Mazin, D., Menzel, U., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Rosillo, M. Nievas, Nilsson, K., Nishijima, K., Noda, K., Nogues, L., Paiano, S., Palacio, J., Palatiello, M., 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., Ribo, M., Rico, J., Saito, T., Satalecka, K., Schroeder, S., Schweizer, T., Shore, S. N., Sillanpaa, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Strzys, M., Suric, T., Takalo, L., Tavecchio, F., Temnikov, P., Terzic, T., Tescaro, D., Teshima, M., Torres, D. F., Torres-Alba, N., Toyama, T., Treves, A., Vanzo, G., Acosta, M. Vazquez, Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zaric, D., Desiante, R., Gonzalez, J. Becerra, D'Ammando, F., Larsson, S., Raiteri, C. M., Reinthal, R., Lahteenmaki, A., Jarvela, E., Tornikoski, M., Ramakrishnan, V., Jorstad, S. G., Marscher, A. P., Bala, V., Macdonald, N. R., Kaur, N., Sameer, Baliyan, K., Acosta-Pulido, J. A., Lazaro, C., Marti-Nez-Lombilla, C., Grinon-Marin, A. B., Yabar, A. Pastor, Protasio, C., Carnerero, M. I., Jermak, H., Steele, I. A., Larionov, V. M., Borman, G. A., Grishina, T. S., MAGIC Collaboration, and Fermi-LAT Collaboration
Subjects: Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, gamma rays: galaxies, Astrophysics::Cosmology and Extragalactic Astrophysics, quasars: individual: PKS 1510-089, galaxies: jets
Abstract: Context. PKS 1510 089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510 089 emission during a high gamma-ray state. Methods. We performed VHE gamma-ray observations of PKS 1510 089 with the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) telescopes during a long, high gamma-ray state in May 2015. In order to perform broadband modeling of the source, we have also gathered contemporaneous multiwavelength data in radio, IR, optical photometry and polarization, UV, X-ray, and GeV gamma-ray ranges. We construct a broadband spectral energy distribution (SED) in two periods, selected according to VHE gamma-ray state. Results. PKS 1510 089 was detected by MAGIC during a few day-long observations performed in the middle of a long, high optical and gamma-ray state, showing for the first time a significant VHE gamma-ray variability. Similarly to the optical and gamma-ray high state of the source detected in 2012, it was accompanied by a rotation of the optical polarization angle and the emission of a new jet component observed in radio. However, owing to large uncertainty on the knot separation time, the association with the VHE gamma-ray emission cannot be firmly established. The spectral shape in the VHE band during the flare is similar to those obtained during previous measurements of the source. The observed flux variability sets constraints for the first time on the size of the region from which VHE gamma rays are emitted. We model the broadband SED in the framework of the external Compton scenario and discuss the possible emission site in view of multiwavelength data and alternative emission models.

29. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

Author: I. Snidaric, M. Strzys, M. Vazquez Acosta, J. A. Acosta-Pulido, Vishal Bala, B. De Lotto, J. Palacio, Julian Sitarek, L. Nogués, E. Colombo, B. Biasuzzi, M. Makariev, C. Fruck, D. Nakajima, T. Toyama, Diego F. Torres, Abelardo Moralejo, Stefan Larsson, Navpreet Kaur, R. Desiante, L. O. Takalo, I. Reichardt, Francesco Longo, E. Prandini, Arka Chatterjee, A. Sillanpää, M. Peresano, A. Niedzwiecki, D. Hadasch, Elina Lindfors, D. Fidalgo, M. Engelkemeier, C. Protasio, S. Bonnefoy, Iain A. Steele, Daniel Mazin, S. Paiano, Karl Mannheim, Takashi Saito, Nicholas R. MacDonald, David Paneque, D. Guberman, Anne Lähteenmäki, Svetlana G. Jorstad, Kiran S. Baliyan, Tarek M. Hassan, W. Bednarek, L. Perri, Fabrizio Tavecchio, U. Menzel, Masahiro Teshima, M. Palatiello, Marina Manganaro, Stefano Ansoldi, Yusuke Konno, Ll. Font, Merja Tornikoski, S. Schroeder, Ivica Puljak, Riccardo Paoletti, D. Eisenacher Glawion, F. Di Pierro, Pierre Colin, Oscar Blanch, Pratik Majumdar, Mosè Mariotti, Markus Garczarczyk, Francesco Dazzi, M. Nievas Rosillo, T. S. Grishina, Louis Antonelli, M. V. Fonseca, A. Fernández-Barral, J. Hose, Max Ludwig Ahnen, F. Borracci, Emilia Järvelä, R. J. García López, G. Pedaletti, Thomas Bretz, Stefano Covino, P. Cumani, Kazuma Ishio, C. M. Raiteri, Konstancja Satalecka, T. Surić, M. Doert, M. H. Wu, E. de Oña Wilhelmi, D. Elsaesser, Michele Doro, A. B. Grinon-Marin, Dario Hrupec, J. Becerra González, D. Kuveždić, Nikola Godinovic, P. Temnikov, C. Lázaro, Saverio Lombardi, A. Pastor Yabar, Helen Jermak, Rodolfo Carosi, M. A. Lopez, Antonio Stamerra, J. E. Ward, S. N. Shore, Alessio Berti, P. Giammaria, Filippo D'Ammando, Juan Abel Barrio, R. Reinthal, P. Da Vela, D. Tescaro, P. G. Prada Moroni, Razmik Mirzoyan, U. Barres de Almeida, Massimo Persic, Alessandro Carosi, D. Galindo, Aaron Dominguez, L. Maraschi, Damir Lelas, Kari Nilsson, Daniela Dorner, Dariusz Gora, Gaia Vanzo, N. Torres-Albà, E. Moretti, M. Hayashida, Sameer, M. Gaug, Dorota Sobczyńska, J. M. Paredes, X. Paredes-Fortuny, J. Herrera, C. Martínez-Lombilla, D. Zarić, M. Will, Alexander Hahn, Tomislav Terzić, Koji Noda, Marc Ribó, Elisa Bernardini, J. R. Garcia, Gareth Hughes, Hidetoshi Kubo, K. Nishijima, D. Dominis Prester, V. Ramakrishnan, V. Fallah Ramazani, M. I. Martínez, G. A. Borman, Wolfgang Rhode, P. Bangale, J. Kushida, Jose Luis Contreras, Sabrina Einecke, G. Bonnoli, Juan Cortina, B. Banerjee, C. Arcaro, Valeri M. Larionov, Ana Babić, Adrian Biland, J. Rico, M. I. Carnerero, Alan P. Marscher, Ievgen Vovk, A. De Angelis, A. Treves, Vitaly Neustroev, T. Schweizer, G. Maneva, Juri Poutanen, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Arcaro, C., Babiä , A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., 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 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., 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., Majumdar, P., Makariev, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martãnez, M., Mazin, D., Menzel, U., 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., Shore, S. N., 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., Toyama, T., Treves, A., Vanzo, G., Vazquez Acosta, M., Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zariä , D., Desiante, R., Becerra GonzÃ¡lez, J., D'Ammando, F., Larsson, S., Raiteri, C. M., Reinthal, R., Lã¤hteenmã¤ki, A., Jã¤rvelã¤, E., Tornikoski, M., Ramakrishnan, V., Jorstad, S. G., Marscher, A. P., Bala, V., Macdonald, N. R., Kaur, N., Sameer, Null, Baliyan, K., Acosta Pulido, J. A., Lazaro, C., MartÃ Nez Lombilla, C., Grinon Marin, A. B., Pastor Yabar, A., Protasio, C., Carnerero, M. I., Jermak, H., Steele, I. A., Larionov, V. M., Borman, G. A., Grishina, T. S., Swiss Federal Institute of Technology Zurich, University of Udine, INAF National Institute for Astrophysics, University of Padova, University of Rijeka, Saha Institute of Nuclear Physics, Max Planck Institute for Physics, Complutense University, University of Łódź, German Electron Synchrotron, Autonomous University of Barcelona, University of Siena, University of Würzburg, Instituto de Astrofísica de Canarias, Institute of Space Studies of Catalonia, Dortmund University, Finnish MAGIC Consortium, University of Barcelona, The University of Tokyo, Osservatorio Astronomicodi Roma, Bulgarian Academy of Sciences, University of Pisa, University of Bologna, KTH Royal Institute of Technology, University of Turku, Metsähovi Radio Observatory, Department of Radio Science and Engineering, Boston University, Physical Research Laboratory India, Lancaster University, Liverpool John Moores University, St. Petersburg State University, Crimean Astrophysical Observatory, Department of Electronics and Nanoengineering, Aalto-yliopisto, and Aalto University
Subjects: galaxies [Gamma rays], VHE [gamma ray], Astrophysics, 01 natural sciences, rotation, jet [Galaxies], law.invention, law, galaxies, active, galaxies: jets, gamma rays: galaxies, quasars: individual: PKS 1510-089, Broadband, QD, 010303 astronomy & astrophysics, QC, QB, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), galaxie [Gamma rays], Gamma ray, Optical polarization, Galaxies: active, Polarization (waves), Gamma rays: galaxies, optical [polarization], Spectral energy distribution, Electrónica, Física nuclear, Electricidad, Astrophysics - High Energy Astrophysical Phenomena, Galaxies: jets, Quasars: individual: PKS 1510-089, Astronomy and Astrophysics, Space and Planetary Science, Flare, active [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Photometry (optics), X-ray, 0103 physical sciences, individual: PKS 1510-089 [Quasars], quasar, Astrophysics::Galaxy Astrophysics, 010308 nuclear & particles physics, Quasar, Astronomy and Astrophysic, MAGIC, flux, ddc:520, spectral, jets [Galaxies]
Abstract: Context. PKS 1510-089 is one of only a few flat spectrum radio quasars detected in the VHE (very-high-energy, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510-089 emission during a high gamma-ray state. Methods. We performed VHE gamma-ray observations of PKS 1510-089 with the MAGIC telescopes during a long high gamma-ray state in May 2015. In order to perform broadband modelling of the source, we have also gathered contemporaneous multiwavelength data in radio, IR, optical photometry and polarization, UV, X-ray and GeV gamma-ray ranges. We construct a broadband spectral energy distribution (SED) in two periods, selected according to VHE gamma-ray state. Results. PKS 1510-089 has been detected by MAGIC during a few day-long observations performed in the middle of a long, high optical and gamma-ray state, showing for the first time a significant VHE gamma-ray variability. Similarly to the optical and gamma-ray high state of the source detected in 2012, it was accompanied by a rotation of the optical polarization angle and the emission of a new jet component observed in radio. However, due to large uncertainty on the knot separation time, the association with the VHE gamma-ray emission cannot be firmly established. The spectral shape in the VHE band during the flare is similar to the ones obtained during previous measurements of the source. The observed flux variability sets for the first time constraints on the size of the region from which VHE gamma rays are emitted. We model the broadband SED in the framework of the external Compton scenario and discuss the possible emission site in view of multiwavelength data and alternative emission models., 12 pages, 10 figures, accepted for a publication in A&A

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29 results on '"Quasars: individual: PKS 1510-089"'

1. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

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

3. Multiwavelength variability study and search for periodicity of PKS 1510-089.

4. 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

5. HESS and MAGIC observations of a sudden cessation of a very-high-energy gamma-ray flare in PKS 1510-089 in May 2016

6. Turbulent spectra of the brightest gamma-ray flares of blazars.

7. 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

8. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012.

9. Time-dependent simulations of emission from the FSRQ PKS 1510−089: multiwavelength variability of external Compton and synchrotron self-Compton models.

10. Optical monitoring of PKS 1510−089: a binary black hole system?

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

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

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

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

15. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

16. PROBING THE INNER JET OF THE QUASAR PKS 1510-089 WITH MULTI-WAVEBAND MONITORING DURING STRONG GAMMA-RAY ACTIVITY

17. Fermi Large Area Telescope and Multi-wavelength Observations of the Flaring Activity of PKS 1510-089 between 2008 September and 2009 June

18. PKS 1510-089: a rare example of a flat spectrum radio quasar with a very high-energy emission

19. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

20. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

21. Multi-epoch parsec-scale observations of the blazar PKS 1510-089

22. AGILE detection of extreme \gamma-ray activity from the blazar PKS 1510-089 during March 2009. Multifrequency analysis

23. H.E.S.S. discovery of VHE y-rays from the quasar PKS 1510-089

24. HESS discovery of VHE gamma-rays from the quasar PKS 1510-089

25. FERMI Large Area Telescope and multi-wavelength observations of the flaring activity of PKS 1510-089 between 2008 september and 2009 june

26. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

27. MAGIC gamma-ray and multi-frequency observations of flat spectrum radio quasar PKS 1510-089 in early 2012

28. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

29. Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015

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29 results on '"Quasars: individual: PKS 1510-089"'

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