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

Collaboration, MAGIC and Ahnen, ML and Ansoldi, S and Antonelli, LA and Arcaro, C and Babić, A and Banerjee, B and Bangale, P and Almeida, UBD and Barrio, JA and González, JB and Bednarek, W and Bernardini, E and Berti, A and Biasuzzi, B and Biland, A and Blanch, O and Bonnefoy, S and Bonnoli, G and Borracci, F and Bretz, T and Carosi, R and Carosi, A and Chatterjee, A and Colin, P and Colombo, E and Contreras, JL and Cortina, J and Covino, S and Cumani, P and Vela, PD and Dazzi, F and Angelis, AD and Lotto, BD and Wilhelmi, EDO and Pierro, FD and Doert, M and Domínguez, A and Prester, DD and Dorner, D and Doro, M and Einecke, S and Glawion, DE and Elsaesser, D and Engelkemeier, M and Ramazani, VF and Fernández-Barral, A and Fidalgo, D and Fonseca, MV and Font, L and Fruck, C and Galindo, D and López, RJG and Garczarczyk, M and Gaug, M and Giammaria, P and Godinović, N and Gora, D and Guberman, D and Hadasch, D and Hahn, A and Hassan, T and Hayashida, M and Herrera, J and Hose, J and Hrupec, D and Hughes, G and Ishio, K and Konno, Y and Kubo, H and Kushida, J and Kuveždić, D and Lelas, D and Lindfors, E and Lombardi, S and Longo, F and López, M and Majumdar, P and Makariev, M and Maneva, G and Manganaro, M and Mannheim, K and Maraschi, L and Mariotti, M and Martínez, M and Mazin, D and Menzel, U and Mirzoyan, R and Moralejo, A and Moretti, E and Nakajima, D and Neustroev, V and Niedzwiecki, A and Rosillo, MN and Nilsson, K and Nishijima, K and Noda, K and Nogués, L and Paiano, S and Palacio, J and Palatiello, M and Paneque, D and Paoletti, R and Paredes, JM and Paredes-Fortuny, X and Pedaletti, G and Peresano, M and Perri, L and Persic, M and Poutanen, J and Moroni, PGP and Prandini, E and Puljak, I and Garcia, JR and Reichardt, I and Rhode, W and Ribó, M and Rico, J and Saito, T and Satalecka, K and Schroeder, S and Schweizer, T and Shore, SN and Sillanpää, A and Sitarek, J and Šnidarić, I and Sobczynska, D and Stamerra, A and Strzys, M and Surić, T and Takalo, L and Tavecchio, F and Temnikov, P and Terzić, T and Tescaro, D and Teshima, M and Torres, DF and Torres-Albà, N and Toyama, T and Treves, A and Vanzo, G and Acosta, MV and Vovk, I and Ward, JE and Will, M and Wu, MH and Zarić, D and Desiante, R and González, JB and D'Ammando, F and Larsson, S and Raiteri, CM and Reinthal, R and Lähteenmäki, A and Järvelä, E and Tornikoski, M and Ramakrishnan, V and Jorstad, SG and Marscher, AP and Bala, V and MacDonald, NR and Kaur, N and Sameer, and Baliyan, K and Acosta-Pulido, JA and Lazaro, C and Martínez-Lombilla, C and Grinon-Marin, AB and Yabar, AP and Protasio, C and Carnerero, MI and Jermak, HE and Steele, IA and Larionov, VM and 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:
Date Deposited: 25 May 2017 10:59
Last Modified: 12 Sep 2017 14:18
DOI or Identification number: 10.1051/0004-6361/201629960
URI: http://researchonline.ljmu.ac.uk/id/eprint/5849

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