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A search for the radio counterpart to the 1994 March 1 gamma-ray burst
- Source :
- Astrophysical Journal, Part 2 - Letters. 437(1)
- Publication Year :
- 1994
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1994.
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Abstract
- We report on the results of a search for the radio counterpart to the bright gamma-ray burst of 1994 March 1. Using the Dominion Radio Astrophysical Observatory Synthesis Telescope sensitive, wide-field radio images at 1.4 GHz and 0.4 GHz were made of a region around GRB 940301. A total of 15 separate radio images were obtained at each frequency, sampling a near-continuous range of post-burst timescales between 3 and 15 days, as well as 26, 47, and 99 days. We place an upper limit of 3.5 mJy on a fading/flaring radio counterpart at 1.4 GHz and 55 mJy at 0.4 GHz. Unlike past efforts our counterpart search maintains high sensitivity over two decades of post-burst time durations. Time-variable radio emission after the initial gamma-ray burst is a prediction of all fireball models, currently the most popular model for gamma-ray bursts. Our observations allow us to put significant constraints on the fireball parameters for cosmological models of gamma-ray bursts.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Volume :
- 437
- Issue :
- 1
- Database :
- NASA Technical Reports
- Journal :
- Astrophysical Journal, Part 2 - Letters
- Notes :
- NAG5-1550
- Publication Type :
- Report
- Accession number :
- edsnas.19950040644
- Document Type :
- Report
- Full Text :
- https://doi.org/10.1086/187678