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:21163539

Hui, Li; Liang, Edison ^[1]

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1. NIS-2, MS D436, Los Alamos National Lab, Los Alamos, New Mexico 87545 (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 'delayed turn-on' 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.

• OSTI ID: 21163539
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 384; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GAMMA BURSTS
COSMIC PHOTONS
COSMIC RAY DETECTION
GALAXIES
GAMMA DETECTION
MATHEMATICAL MODELS
SENSITIVITY