http://arxiv.org/abs/2007.03086
The gravitational-wave event S190521g — a likely binary black hole merger in the accretion disk of an active galactic nucleus — was accompanied by an optical counterpart. Such dense environments around luminous energy release regions are favourable for high energy $\gamma$-ray production. We report on a search for high energy $\gamma$-rays from the direction of the candidate electromagnetic counterpart to the S190521g event using publicly-available data of the Fermi-LAT space $\gamma$-ray telescope. No significant signal was found. We present upper limits on the spectral energy distribution of the source in the 100 MeV — 300 GeV energy range. We discuss the importance of studying S190521g-like transients in the context of cosmic ray acceleration, $\gamma$-ray and neutrino production in such sources.
E. Podlesnyi and T. Dzhatdoev
Wed, 8 Jul 20
69/77
Comments: 3 pages, 2 figures. Comments are welcome!
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