A Third Class of Gamma-Ray Bursts?

  title={A Third Class of Gamma-Ray Bursts?},
  author={I. Horv{\'a}th},
  journal={The Astrophysical Journal},
  • I. Horváth
  • Published 1998
  • Physics
  • The Astrophysical Journal
  • Two classes of gamma-ray bursts have been identified so far, characterized by T90 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 T90. The χ2 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%. 
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