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Jet geometry and rate estimate of coincident gamma-ray burst and gravitational-wave observations


Mogushi, K and Cavaglia, M and Siellez, K, Jet geometry and rate estimate of coincident gamma-ray burst and gravitational-wave observations, The Astrophysical Journal, 880 Article 55. ISSN 0004-637X (2019) [Refereed Article]

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DOI: doi:10.3847/1538-4357/ab1f76


Short gamma-ray burst (SGRB) progenitors have long been thought to be coalescing binary systems of two neutron stars (NSNS) or a neutron star and a black hole. The 2017 August 17th detection of the GW170817 gravitational-wave (GW) signal by Advanced LIGO and Advanced Virgo in coincidence with the electromagnetic observation of the SGRB GRB 170817A confirmed this scenario and provided new physical information on the nature of these astronomical events. We use SGRB observations by the Neil Gehrels Swift Observatory Burst Alert Telescope and GW170817/GRB 170817A observational data to estimate the detection rate of coincident GW and electromagnetic observations by a GW detector network and constrain the physical parameters of the SGRB jet structure. We estimate the rate of GW detections coincident with SGRB electromagnetic detections by the Fermi Gamma-ray Burst Monitor to be between ∼0.1 and ∼0.6 yr−1 in the third LIGO-Virgo observing run and between ∼0.3 and ∼1.8 yr−1 for the LIGO-Virgo-KAGRA network at design sensitivity. Assuming a structured model with a uniform ultrarelativistic jet surrounded by a region with power-law decay emission, we find the jet half-opening angle and the power-law decay exponent to be θc ∼ 722 and s ∼ 530 at a 1σ confidence level, respectively.

Item Details

Item Type:Refereed Article
Keywords:gamma-ray burst: general, stars: black holes, stars: jets, stars: neutron
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:151002
Year Published:2019
Web of Science® Times Cited:8
Deposited By:Physics
Deposited On:2022-07-11
Last Modified:2022-07-11

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