Radio Monitoring of the 1997 January 11 Gamma-Ray Burst
Open Access
- 10 July 1997
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 483 (2), L91-L94
- https://doi.org/10.1086/310753
Abstract
We report on a comprehensive radio monitoring program of the bright gamma-ray burster GRB 970111. These VLA observations were made at a frequency of 1.4 GHz (λ = 20 cm) and span a range of postburst timescales between 28 hr and 1 month. Despite extensive sampling at submillijansky sensitivities, no radio source was detected above 0.5 mJy in the current best error box (~14 arcmin2) for GRB 970111. A highly unusual radio source, VLA J1528.7+1945, was seen to drop in flux density by a factor of 2 in our monitoring period, but it lies outside the error box, and thus it is unlikely to be related to GRB 970111. Cosmological fireball models of gamma-ray bursts make predictions of late-time emission occurring at longer wavelengths. The absence of a flaring or fading radio counterpart to GRB 970111 provides strong constraints on these models.Keywords
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