An Observational Evidence for the Difference Between the Short and Long Gamma-Ray Bursts

Balázs, Lajos György and Mészáros, Péter and Bagoly, Zsolt and Horváth, István and Mészáros, A. (2003) An Observational Evidence for the Difference Between the Short and Long Gamma-Ray Bursts. In: GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceedings (662). American Institute of Physics, Melville, pp. 137-139. ISBN 0-7354-0122-5

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Abstract

The intrinsic fluence and duration distributions of gamma-ray bursts are well represented by log-normal distributions. This allows a bivariate log-normal distribution fit to be made to the BATSE short and long bursts separately. A statistically significant difference between the long and short groups is found. We argue that the effect is probably real. Applying the Cramér’s theorem these results lead to some predictions for models of long and short bursts.

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