2019/12/31 by Hao Wei, Minzi Feng
Earth and Planetary Sciences · Physics and Astronomy · #Constant false alarm rate #Detector #Earth Systems and Cosmic Evolution #Electromagnetic pulse #Electromagnetic radiation #Gamma-ray bursts and supernovae #Gravitational wave #Neutron star #Pulsars and Gravitational Waves Research #astro-ph.HE #astro-ph.IM #gr-qc
paper · pdf · doi:10.1088/1572-9494/ab7ed7
published as Commun. Theor. Phys. 72 (2020) 065401 · 12 pages, 3 tables, 1 figure, revtex4; v2: discussions added, Commun. Theor. Phys. in press; v3: published version
openalex created_date 2019/12/13 · openalex publication_date 2020/05/18 · arxiv created 2020/05/30 · arxiv updated 2020/06/02 · openalex updated_date 2026/08/05
Abstract LIGO/Virgo S190814bv is the first high-probability neutron star–black hole (NSBH) merger candidate, whose gravitational waves (GWs) triggered LIGO/Virgo detectors at 21:10:39.012957 UT, 14 August 2019. It has a probability >99% of being an NSBH merger, with a low false alarm rate (FAR) of one per 1.559e+25 years. For an NSBH merger, electromagnetic counterparts (especially short gamma-ray bursts (GRBs)) are generally expected. However, no electromagnetic counterpart has been found in the extensive follow-up observing campaign. In the present work, we propose a novel explanation for this null result. In our scenario, LIGO/Virgo S190814bv is just a GW mirror image of the real NSBH merger which should have been detected before 14 September 2015, but at that time we had no ability to detect its GW signals. The electromagnetic counterparts associated with the real NSBH merger should be found in the archive data before 14 September 2015. In this work, we indeed find nine short GRBs that are possibly electromagnetic counterparts.