MAGIC observations of variable very-high-energy gamma-ray emission from PKS1510-089 during May 2015 outburst
Source
Proceedings of Science
Date Issued
2017-01-01
Author(s)
Sitarek, Julian
González, Josefa Becerra
Ramazani, Vandad Fallah
Lindfors, Elina
Pedaletti, Giovanna
Tavecchio, Fabrizio
Acosta, Monica Vazquez
Larsson, Stefan
Baliyan, Kiran
Kaur, Navpreet
Jorstad, Svetlana
Raiteri, Claudia
Abstract
PKS1510-089 is a flat spectrum radio quasar located at a redshift of 0.36. It is one of only a few such sources detected in very-high-energy (VHE, >100 GeV) gamma rays. Though PKS1510-089 is highly variable at GeV energies, until recently no variability has been observed in the VHE band. In 2015 May PKS1510-089 showed a high state in optical and in the GeV range. A VHE gamma-ray flare was detected with MAGIC at that time, showing the first instance of VHE gamma-ray flux variability on the time scale of days in this source. We will present the MAGIC results from this observation, discuss their temporal and spectral properties in the multi-wavelength context and present modelling of such emission in the external Compton scenario.