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Issue A&A
Volume 392, Number 3, September IV 2002
Page(s) 791 - 793
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20020808



A&A 392, 791-793 (2002)
DOI: 10.1051/0004-6361:20020808

A further study of the BATSE Gamma-Ray Burst duration distribution

I. Horváth

Dept. of Physics, Bolyai Military University, Budapest, POB 12, 1456, Hungary
(Received 21 March 2002 / Accepted 27 May 2002)

Abstract
Two classes of gamma-ray bursts have been identified so far, characterized by durations shorter and longer than about 2 s. In 1998 two independent papers indicated the existence of the third class of the bursts with duration between approximately 2 and 10 s. In this paper, using the full BATSE Catalog, the maximum likelihood estimation is presented, which gives a 0.5% probability for having only two subclasses. A Monte-Carlo simulation also confirms this probability.


Key words: gamma rays: bursts, theory, observations -- methods: data analysis, observational, statistical

SIMBAD Objects in preparation



© ESO 2002


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