Expected Characteristics of the Subclass of Supernova Gamma-Ray Bursts
Abstract
The spatial and temporal coincidence of gamma-ray burst (GRB) 980425 and supernova (SN) 1998bw has prompted speculation that there exists a subclass of GRBs produced by SNe ("S-GRBs"). A physical model motivated by radio observations lead us to propose the following characteristics of S-GRBs: (1) prompt radio emission and an implied high brightness temperature close to the inverse Compton limit, (2) high expansion velocity (≳50,000 km s21) of the optical photosphere as derived from lines widths and energy release larger than usual, (3) no long-lived X-ray afterglow, and (4) a single-pulse GRB profile. Radio studies of previous SNe show that only (but not all) Type Ib and Ic SNe potentially satisfy the first condition. We investigate the proposed associations of GRBs and SNe within the context of these proposed criteria and suggest that ~1% of GRBs detected by BATSE may be members of this subclass.
Additional Information
Copyright 1998 American Astronomical Society. Received 1998 July 8, accepted for publication 1998 August 18 Published 1998 September 10. We thank J. Sievers, R. Simcoe, E. Waxman, B. Kirshner, A. Filippenko, S. Sigurdsson, and E. E. Fenimore for helpful discussions and direction at various stages of this work. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. S. R. K. and J. S. B. are supported by the NSF and NASA.Attached Files
Published - 1998-13.pdf
Submitted - 9807050
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Additional details
- Eprint ID
- 53332
- Resolver ID
- CaltechAUTHORS:20150108-095003720
- NSF
- NASA
- Created
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2015-01-09Created from EPrint's datestamp field
- Updated
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2023-06-02Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory, TAPIR, Division of Geological and Planetary Sciences
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1998-13