Constraining GRB phycis through their afterglow light curves

Details Constraining GRB phycis through their afterglow light curves Constraining GRB phycis through their afterglow light curves

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cxo..prop.2842r&link_type=abstract

Chandra proposal ID #11500799

Mathematics

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Scientific paper

Our current understanding of gamma-ray burst afterglow light curves has become increasingly confused, and the validity of the standard synchrotron fireball model for GRBs is nowadays increasingly questioned. In particular, achromatic breaks due to the the lateral expansion of the GRB jet are not substantiated by Swift X-ray observations. It is only through this that the true energies of GRBs are constrained, and questions such as the true rate of GRBs and the determination of cosmological parameters are based upon it. We propose to use CXO to construct the late time X-ray light curves for several Swift bursts. These observations will search for evidence of achromatic jet breaks, providing the necessary insight into the GRB evolution, and the energy and activity of the central engine.

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