1998/03/31 by I. Horváth, I. Horvath · 5 citations
Physics and Astronomy · #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.1086/306416
published as Astrophys.J. 508 (1998) 757 · 10 pages, 5 Postscript figures. Submitted to The Astrophysical Journal, October 1997
arxiv created 1998/05/17 · openalex publication_date 1998/12/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Two classes of gamma-ray bursts have been identified so far, characterized by T 90 durations shorter and longer than approximately 2 s. We show here that the BATSE 3B data allow a good fit with three Gaussian distributions in log T 90 . The χ 2 statistic indicates a 40% probability for two-Gaussian fits, whereas the three-Gaussian fit probability is 98%. Using another statistical method, it is argued that the probability that the third class is a random fluctuation is less than 0.02%.