A Third Class of GammaRay Bursts?
Abstract
Two classes of gammaray 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 twoGaussian fits, whereas the threeGaussian 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%.
 Publication:

The Astrophysical Journal
 Pub Date:
 December 1998
 DOI:
 10.1086/306416
 arXiv:
 arXiv:astroph/9803077
 Bibcode:
 1998ApJ...508..757H
 Keywords:

 GAMMA RAYS: BURSTS;
 METHODS: STATISTICAL;
 Gamma Rays: Bursts;
 Methods: Statistical;
 Astrophysics
 EPrint:
 10 pages, 5 Postscript figures. Submitted to The Astrophysical Journal, October 1997