HOW LONG DOES A BURST BURST

@article{Zhang2014HOWLD,
  title={HOW LONG DOES A BURST BURST},
  author={Bin-Bin Zhang and Bing Zhang and Kohta Murase and Valerie Connaughton and M S Briggs},
  journal={The Astrophysical Journal},
  year={2014},
  volume={787},
  pages={66}
}
Several gamma-ray bursts (GRBs) last much longer (∼hours) in γ-rays than typical long GRBs (∼minutes), and it has recently been proposed that these 'ultra-long GRBs' may form a distinct population, probably with a different (e.g., blue supergiant) progenitor than typical GRBs. However, Swift observations suggest that many GRBs have extended central engine activities manifested as flares and internal plateaus in X-rays. We perform a comprehensive study on a large sample of Swift GRBs with X-Ray… Expand

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