1. Chasing Gravitational Waves with the Cherenkov Telescope ArrayJ. G. Green, Saptashwa BHATTACHARYYA, Judit Pérez-Romero, Samo Stanič, Veronika VODEB, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, Miha ŽIVEC, 2023, published scientific conference contribution Abstract: The detection of gravitational waves (GWs) from a binary neutron star (BNS) merger by Advanced
LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts
of this GW event, ushered in a new era of multimessenger astronomy, providing the first
direct evidence that BNS mergers are progenitors of short gamma-ray bursts (GRBs). Such events
may also produce very-high-energy (VHE, > 100 GeV) photons which have yet to be detected
in coincidence with a GW signal. The Cherenkov Telescope Array (CTA) is a next-generation
VHE observatory which aims to be indispensable in this search, with an unparalleled sensitivity
and ability to slew anywhere on the sky within a few tens of seconds. Achieving such a feat
will require a comprehensive real-time strategy capable of coordinating searches over potentially
very large regions of the sky. This work will evaluate and provide estimations on the number of
GW-CTA events determined from simulated BNS systems and short GRBs, considering both on and
off-axis emission. In addition, we will present and discuss the prospects of potential follow-up
strategies with CTA.
Keywords: gravitational waves (GWs), binary neutron star (BNS) merger, short gamma-ray bursts (GRBs), Advanced LIGO and Advanced Virgo, GW electromagnetic counterparts, multimessenger astrophysics, very-high-energy gamma-rays, Cherenkov Telescope Array
Published in RUNG: 15.09.2023; Views: 105; Downloads: 2
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