Evidence Against an Association Between GammaRay Bursts and Type I Supernovae
Abstract
We use a rigorous method, based on Bayesian inference, for calculating the odds favoring the hypothesis that any particular class of astronomical transients produce gammaray bursts over the hypothesis that they do not. We then apply this method to a sample of 83 Type Ia supernovae and a sample of 20 Type IbIc supernovae. We find overwhelming odds against the hypothesis that all Type Ia supernovae produce gammaray bursts, whether at low redshift ($10^{9}:1$) or highredshift ($10^{12}:1$), and very large odds ($6000:1$) against the hypothesis that all Type Ib, Ib/c, and Ic supernovae produce observable gammaray bursts. We find large odds ($34:1$) against the hypothesis that a fraction of Type Ia supernovae produce observable gammaray bursts, and moderate odds ($6:1$) against the hypothesis that a fraction of Type IbIc supernovae produce observable bursts.
 Publication:

arXiv eprints
 Pub Date:
 September 1999
 arXiv:
 arXiv:astroph/9909025
 Bibcode:
 1999astro.ph..9025G
 Keywords:

 Astrophysics
 EPrint:
 proc. of GammaRay Bursts in the Afterglow Era, Nov. 1998, Rome, F. Frontera &