We report high-energy spectral data of the prompt emission of GRB 970228 and its X-ray afterglow. We establish that the nature of the X-ray afterglow emission is nonthermal and similar to the later portion of GRB 970228. Our data can be used to discriminate different emission models of GRB afterglows. While cooling of excited compact objects can be ruled out, fireball models are constrained in the physics of the radiation emission processes and their evolution.
Spectral properties of the prompt X-ray emission andafterglow from theGamma-Ray Burst of 28 February 1997,
FRONTERA, Filippo;Orlandini, M.;ZAVATTINI, Guido
1998
Abstract
We report high-energy spectral data of the prompt emission of GRB 970228 and its X-ray afterglow. We establish that the nature of the X-ray afterglow emission is nonthermal and similar to the later portion of GRB 970228. Our data can be used to discriminate different emission models of GRB afterglows. While cooling of excited compact objects can be ruled out, fireball models are constrained in the physics of the radiation emission processes and their evolution.File in questo prodotto:
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