Expected gamma-ray burst excess from M31 based on halo models

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.51704· OSTI ID:526777

Li, H ^[1]; Liang, E ^[2]

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1. NIS-2, MS D436, Los Alamos National Lab, Los Alamos, New Mexico 87545 (United States)
2. Dept. of Space Physics and Astronomy, Rice University, Houston, Texas 77251 (United States)

We calculate the expected excess of gamma-ray bursts (GRBs) from the direction of M31 assuming that GRBs come from an extended halo around both M31 and our own galaxy. Specifically, we consider the {open_quotes}delayed turn-on{close_quotes} model and the halo beaming model for GRBs. We express the GRB rate from M31 as functions of instrument sensitivities, and the observing solid angle towards M31. We conclude that, with a gamma-ray instrument that is ten times more sensitive than BATSE, delayed turn-on model gives a strong excess of GRBs from M31 but halo beaming model gives only a possible marginal detection in over a year of observations. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 526777
• Report Number(s): CONF-9510332--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 384; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
COSMIC GAMMA BURSTS
GALAXIES
GAMMA DETECTION
LUMINOSITY
MATHEMATICAL MODELS
NEUTRON STARS