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arXiv · 2108.07317

An Archival Search for Very-High-Energy Counterparts to Sub-Threshold Neutron-Star Merger Candidates

Colin Adams·Imre Bartos·K. Rainer Corley·Szabolcs Márka·Zsuzsanna Márka·Doğa Veske
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Abstract

The recent discovery of electromagnetic signals in coincidence with gravitational waves from neutron-star mergers has solidified the importance of multimessenger campaigns for studying the most energetic astrophysical events. Pioneering multimessenger observatories, such as the LIGO/Virgo gravitational wave detectors and the IceCube neutrino observatory, record many candidate signals that fall short of the detection significance threshold. These sub-threshold event candidates are promising targets for multimessenger studies, as the information provided by these candidates may, when combined with time-coincident gamma-ray observations, lead to significant detections. In this contribution, I describe our use of sub-threshold binary neutron star merger candidates identified in Advanced LIGO's first observing run (O1) to search for transient events in very-high-energy gamma rays using archival observations from the VERITAS imaging atmospheric Cherenkov telescope array. I describe the promise of this technique for future joint sub-threshold searches.

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Colin Adams, Imre Bartos, K. Rainer Corley, Szabolcs Márka, Zsuzsanna Márka, Doğa Veske. 2021-08-16. An Archival Search for Very-High-Energy Counterparts to Sub-Threshold Neutron-Star Merger Candidates. https://doi.org/10.22323/1.395.0948

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