The Supernovae of Gamma-Ray Bursts

Details The Supernovae of Gamma-Ray Bursts The Supernovae of Gamma-Ray Bursts

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..327b&link_type=abstract

NOAO Proposal ID #2005B-0327

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Scientific paper

It is now clear that long (t> 2 seconds) gamma-ray bursts are related to core-collapse supernovae. From examples in hand, we know that there is a substantial diversity in the observable properties of these SN. However, we still know little about the range of supernovae and progenitor stars that can produce GRBs. Only three GRBs have spectra that reveal their underlying SN, and one of these (GRB 980425/SN1998bw) may belong to a class separate from most cosmological GRBs. Here we propose to obtain spectra of GRB afterglows to study the nature of the SNe underlying these extraordinary objects. In order to insure high-quality spectra, only GRBs with z< 0.4 will be followed. The combined presence of both HETE and Swift in orbit makes it likely that one or two GRBs in this redshift range will be discovered during the upcoming semester.

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