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arXiv · 2602.05169

Searching for gravitational waves from compact binary mergers powering long gamma-ray bursts during LIGO-Virgo-KAGRA's O3 run

Mallika R. Sinha·Teagan A. Clarke·Qifang Zhang·Nikhil Sarin·Eric Thrane·Paul D. Lasky
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Abstract

Neutron star binary mergers are often associated with short gamma-ray bursts (GRBs), but the recent detection of kilonovae coincident with long GRBs suggest that some mergers may produce long GRBs. Motivated by these developments, we perform a search for binary neutron star and neutron star-black hole gravitational-wave signals coincident with long GRBs using data from the third LIGO--Virgo--KAGRA (LVK) observing run. We analyze LVK data coincident with long GRBs detected by Fermi's GRB Monitor and Swift's Burst Alert Telescope when at least two gravitational-wave observatories were running. We find no evidence of a coincident gravitational-wave signal and set limits on the luminosity distance to each of these long GRBs under the assumption that they were powered by binary mergers.

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Mallika R. Sinha, Teagan A. Clarke, Qifang Zhang, Nikhil Sarin, Eric Thrane, Paul D. Lasky. 2026-02-05. Searching for gravitational waves from compact binary mergers powering long gamma-ray bursts during LIGO-Virgo-KAGRA's O3 run. https://doi.org/10.1093/mnras%2Fstag834

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