Evidence for a Canonical GRB Afterglow Light Curve in the Swift/XRT Data

Details Evidence for a Canonical GRB Afterglow Light Curve in the Swift/XRT Data Evidence for a Canonical GRB Afterglow Light Curve in the Swift/XRT Data

2005-08-15

arxiv.org/abs/astro-ph/0508332v2

Astrophys.J.642:389-400,2006

Astronomy and Astrophysics

Astrophysics

35 pages, 8 figures, accepted for publication in ApJ

Scientific paper

10.1086/500724

We present new observations of the early X-ray afterglows of the first 27 gamma-ray bursts (GRBs) detected with the Swift X-ray Telescope (XRT). The early X-ray afterglows show a canonical behavior, where the light curve broadly consists of three distinct power law segments: (i) an initial very steep decay (t^{-alpha} with 34, and augments the already severe requirements for the efficiency of the prompt gamma-ray emission.

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