paper

On the Association of Gamma-Ray Bursts with Supernovae

arXiv:astro-ph/9806364 · doi:10.1086/311634

Abstract

The recent discovery of a supernova (SN 1998bw) seemingly associated with GRB~980425 adds a new twist to the decades-old debate over the origin of gamma-ray bursts. To investigate the possibility that some (or all) bursts are associated with supernovae, we performed a systematic search for temporal/angular correlations using catalogs of BATSE and BATSE/{\it Ulysses} burst locations. We find no associations with any of the precise BATSE/{\it Ulysses} locations, which allows us to conclude that the fraction of high-fluence gamma-ray bursts from known supernovae is small (0.2%). For the more numerous weaker bursts, the corresponding limiting fraction of 1.5% is less constraining due to the imprecise locations of these events. This limit ( bursts) allows that a large fraction of the recent supernovae used as a comparison data set (18 supernovae ) could have associated gamma-ray bursts. Thus, although we find no significant evidence to support a burst/supernova association, the possibility cannot be excluded for weak bursts.

Re-Submitted to Astrophysical Journal Letters, 1998 Jul. 24, 10 pages, 1 figure, 2 tables; (3) [email protected]

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