Properties of Gamma-Ray Burst Classes
Abstract
The three gamma-ray burst (GRB) classes identified by statistical clustering analysis (Mukherjee et al. 1998) are examined using the pattern recognition algorithm C4.5 (Quinlan 1986). Although the statistical existence of Class 3 (intermediate duration, intermediate fluence, soft) is supported, the properties of this class do not need to arise from a distinct source population. Class 3 properties can easily be produced from Class 1 (long, high fluence, intermediate hardness) by a combination of measurement error, hardness/intensity correlation, and a newly-identified BATSE bias (the fluence duration bias). Class 2 (short, low fluence, hard) does not appear to be related to Class 1.
Cite
@article{arxiv.astro-ph/0001335,
title = {Properties of Gamma-Ray Burst Classes},
author = {Jon Hakkila and David J. Haglin and Richard J. Roiger and Robert S. Mallozzi and Geoffrey N. Pendleton and Charles A. Meegan},
journal= {arXiv preprint arXiv:astro-ph/0001335},
year = {2009}
}
Comments
5 pages, 4 imbedded figures, presented at the 5th Huntsville Gamma-Ray Burst Symposium