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Title:
The implications of the Compton (GRO) observations for cosmological gamma-ray bursts
Authors:
Piran, Tsvi
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA)
Publication:
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 389, April 20, 1992, p. L45-L48. (ApJL Homepage)
Publication Date:
04/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Binary Stars, Gamma Ray Bursts, Neutron Stars, Angular Distribution, Halos, Milky Way Galaxy
DOI:
10.1086/186345
Bibliographic Code:
1992ApJ...389L..45P

Abstract

The BATSE observations (Fishman et al.; Meegan et al.) show that the angular distribution of gamma-ray sources in the sky is isotropic. These observations are shown to be consistent with a cosmological distribution of sources. In fact, the observed distribution of V/Vmax values is the one toward which a cosmological distribution converges. If there is even a weak cosmological time dependence of the event rate, then the bursts originate at modest z values. For flat cosmological models, this requires 10 exp 50 ergs or less. The energy and the observed event rate are in full agreement with the binary neutron star merger model.

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