Horvath, I. 2009 Swift暴的duration的分析

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Title:		Analysis of the Swift Gamma-Ray Bursts duration
Authors:		Horvath, I.; Balazs, L. G.; Bagoly, Z.; Kelemen, J.; Veres, P.; Tusnady, G.
Publication:		eprint arXiv:0906.5582
Publication Date:		06/2009
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:		NANJING GAMMA-RAY BURST CONFERENCE 2008
Bibliographic Code:		2009arXiv0906.5582H

Abstract

Two classes of gamma-ray bursts have been identified in the BATSE catalogs characterized by durations shorter and longer than about 2 seconds. There are, however, some indications for the existence of a third type of burst. Swift satellite detectors have different spectral sensitivity than pre-Swift ones for gamma-ray bursts. Therefore it is worth to reanalyze the durations and their distribution and also the classification of GRBs. Using The First BAT Catalog the maximum likelihood estimation was used to analyzed the duration distribution of GRBs. The three log-normal fit is significantly (99.54 % probability) better than the two for the duration distribution. Monte-Carlo simulations also confirm this probability (99.2 %).

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