Journal
ASTROPHYSICAL JOURNAL
Volume 545, Issue 2, Pages 807-812Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/317869
Keywords
gamma rays : bursts; hydrodynamics; relativity; shock waves
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The standard model of gamma-ray burst (GRB) afterglows assumes that relativistically expanding material is decelerating as a result of interaction with the surrounding medium. The afterglows are well described by the synchrotron radiation from a forward shock, while the strong optical flash associated with GRB 990123 can be attributed to the emission from a reverse shock. We give a detailed study on the reverse shock emission. The full light curves are calculated for long and short GRB cases. We discuss the lack of the prompt optical detections by ROTSE for GRB 981121 and GRB 981223.
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