MAGIC observations of variable very-high-energy gamma-ray emission from PKS1510-089 during May 2015 outburst
J. Sitarek*, J. Becerra Gonzalez, V. Fallah Ramazani, E. Lindfors, G. Pedaletti, F. Tavecchio, M. Vazquez Acosta, S. Larsson, for the MAGIC and Fermi-LAT Collaborations, K. Baliyan, N. Kaur, Sameer, S.G. Jorstad and C. Raiteri
August 16, 2017
August 03, 2018
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.
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