Collaboration, MAGIC, Ahnen, ML, Ansoldi, S, Antonelli, LA, Arcaro, C, Babić, A, Banerjee, B, Bangale, P, Almeida, UBD, Barrio, JA, González, JB, Bednarek, W, Bernardini, E, Berti, A, Biasuzzi, B, Biland, A, Blanch, O, Bonnefoy, S, Bonnoli, G, Borracci, F et al, Bretz, T, Carosi, R, Carosi, A, Chatterjee, A, Colin, P, Colombo, E, Contreras, JL, Cortina, J, Covino, S, Cumani, P, Vela, PD, Dazzi, F, Angelis, AD, Lotto, BD, Wilhelmi, EDO, Pierro, FD, Doert, M, Domínguez, A, Prester, DD, Dorner, D, Doro, M, Einecke, S, Glawion, DE, Elsaesser, D, Engelkemeier, M, Ramazani, VF, Fernández-Barral, A, Fidalgo, D, Fonseca, MV, Font, L, Fruck, C, Galindo, D, López, RJG, Garczarczyk, M, Gaug, M, Giammaria, P, Godinović, N, Gora, D, Guberman, D, Hadasch, D, Hahn, A, Hassan, T, Hayashida, M, Herrera, J, Hose, J, Hrupec, D, Hughes, G, Ishio, K, Konno, Y, Kubo, H, Kushida, J, Kuveždić, D, Lelas, D, Lindfors, E, Lombardi, S, Longo, F, López, M, Majumdar, P, Makariev, M, Maneva, G, Manganaro, M, Mannheim, K, Maraschi, L, Mariotti, M, Martínez, M, Mazin, D, Menzel, U, Mirzoyan, R, Moralejo, A, Moretti, E, Nakajima, D, Neustroev, V, Niedzwiecki, A, Rosillo, MN, Nilsson, K, Nishijima, K, Noda, K, Nogués, L, Paiano, S, Palacio, J, Palatiello, M, Paneque, D, Paoletti, R, Paredes, JM, Paredes-Fortuny, X, Pedaletti, G, Peresano, M, Perri, L, Persic, M, Poutanen, J, Moroni, PGP, Prandini, E, Puljak, I, Garcia, JR, Reichardt, I, Rhode, W, Ribó, M, Rico, J, Saito, T, Satalecka, K, Schroeder, S, Schweizer, T, Shore, SN, Sillanpää, A, Sitarek, J, Šnidarić, I, Sobczynska, D, Stamerra, A, Strzys, M, Surić, T, Takalo, L, Tavecchio, F, Temnikov, P, Terzić, T, Tescaro, D, Teshima, M, Torres, DF, Torres-Albà, N, Toyama, T, Treves, A, Vanzo, G, Acosta, MV, Vovk, I, Ward, JE, Will, M, Wu, MH, Zarić, D, Desiante, R, González, JB, D'Ammando, F, Larsson, S, Raiteri, CM, Reinthal, R, Lähteenmäki, A, Järvelä, E, Tornikoski, M, Ramakrishnan, V, Jorstad, SG, Marscher, AP, Bala, V, MacDonald, NR, Kaur, N, Sameer, , Baliyan, K, Acosta-Pulido, JA, Lazaro, C, Martínez-Lombilla, C, Grinon-Marin, AB, Yabar, AP, Protasio, C, Carnerero, MI, Jermak, HE, Steele, IA, Larionov, VM, Borman, GA and Grishina, TS (2017) Multiwavelength observations of a VHE gamma-ray flare from PKS 1510-089 in 2015. Astronomy and Astrophysics, 603. ISSN 0004-6361

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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 high gamma-ray state in May 2015. In order to perform broad-band 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 in a 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. 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. The broadband SED can be explained in the External Compton scenario.

Item Type:	Article
Uncontrolled Keywords:	astro-ph.HE; astro-ph.HE
Subjects:	Q Science > QB Astronomy Q Science > QC Physics Q Science > QD Chemistry
Divisions:	Astrophysics Research Institute
Publisher:	EDP Sciences
Related URLs:	http://arxiv.org/abs/1610.09416v1
Date Deposited:	25 May 2017 10:59
Last Modified:	04 Sep 2021 11:49
DOI or ID number:	10.1051/0004-6361/201629960
URI:	https://researchonline.ljmu.ac.uk/id/eprint/5849

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