Published in

EDP Sciences, Astronomy & Astrophysics, (603), p. A29, 2017

DOI: 10.1051/0004-6361/201629960

Links

Tools

Export citation

Search in Google Scholar

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

Journal article published in 2016 by Collaboration Magic, Collaboration} {Magic, M.-L. And Ansoldi S. Bernardini E. Paoletti R. Paredes J.-M. Fortuny X. Pedaletti G. Peresano M. Perri L. Persic M. Poutanen J. Prada Moroni P.-G. Prandini E. Berti A. Puljak I. Garcia J.-R. Reichardt I. Ahnen, M.~L {Ahnen}, S. Ansoldi, J. Becerra González, L. A. Antonelli, S. and {Antonelli} L.~A {Ansoldi}, C. Arcaro, A. Babić, C. {Arcaro}, B. Banerjee, A. and {Banerjee} B {Babić}, P. Bangale, P. {Bangale} and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Red circle
Preprint: archiving forbidden
Green circle
Postprint: archiving allowed
Upload
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

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. ; Comment: 11 pages, 10 figures, submitted to A&A