Theoretical interpretation of the X-ray properties of GRB960720
Abstract
BeppoSAX observations of the single pulse burst GRB960720 have allowed a detailed study of its X-ray properties: pulse width in different energy bands, spectral evolution from 2 to 700 keV, etc. We show that the early (0-5s) X-ray emission and the gamma-rays are well explained by internal shocks in a relativistic wind while the late (5-20s) X-ray emission could come from the reverse shock generated in the wind when it interacts with the external medium. The results for a medium of uniform density are compared to the observations.
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