Chasing Gravitational Waves with the Cherenkov Telescope Array

CTA Consortium; Green , J. G.; Carosi, A.; Nava, L.; Patricelli, B.; Schüssler, F.; Seglar-Arroyo, M.; Stamerra, A.

doi:10.22323/1.444.1534

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Chasing Gravitational Waves with the Cherenkov Telescope Array

MPS-Authors

Green , J. G.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society, ou_2074298 ;

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Citation

CTA Consortium, Green, J. G., Carosi, A., Nava, L., Patricelli, B., Schüssler, F., et al. (2024). Chasing Gravitational Waves with the Cherenkov Telescope Array. Proceedings of Science, 444: 1534. doi:10.22323/1.444.1534.

Cite as: https://hdl.handle.net/21.11116/0000-0010-09DD-C

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 coun- terparts 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, > 100GeV) 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.