Likelihood Estimation of Gamma Ray Bursts Duration Distribution

Details Likelihood Estimation of Gamma Ray Bursts Duration Distribution Likelihood Estimation of Gamma Ray Bursts Duration Distribution

2005-06-15

arxiv.org/abs/astro-ph/0506335v1

Astronomy and Astrophysics

Astrophysics

Statistical Challenges in Modern Astronomy III Eric D. Feigelson & G. Jogesh Babu (eds.) New York:Springer-Verlag

Scientific paper

Two classes of Gamma Ray Bursts have been identified so far, characterized by T90 durations shorter and longer than approximately 2 seconds. It was shown that the BATSE 3B data allow a good fit with three Gaussian distributions in log T90. In the same Volume in ApJ. another paper suggested that the third class of GRBs is may exist. Using the full BATSE catalog here we present the maximum likelihood estimation, which gives us 0.5% probability to having only two subclasses. The MC simulation confirms this probability.

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