The BATSE-Swift luminosity and redshift distributions of short-duration GRBs

  title={The BATSE-Swift luminosity and redshift distributions of short-duration GRBs},
  author={Dafne Guetta and Tsvi Piran},
  journal={Astronomy and Astrophysics},
We compare the luminosity function and rate inferred from the BATSE peak flux distribution of short hard bursts (SHBs) with the redshift and luminosity distributions of SHBs observed by Swift /HETE II. While the Swift /HETE II SHB sample is incompatible with the SHB population that follows the star formation rate, it is compatible with an SHB rate that reflects a distribution of delay times after the SFR. This would be the case if SHBs were associated with binary neutron star mergers. The… 

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