Evidence for a Canonical Gamma-Ray Burst Afterglow Light Curve in the Swift XRT Data

  title={Evidence for a Canonical Gamma-Ray Burst Afterglow Light Curve in the Swift XRT Data},
  author={J. Nousek and C. Kouveliotou and D. Grupe and K. Page and J. Granot and E. Ramirez-Ruiz and S. Patel and D. Burrows and V. Mangano and S. Barthelmy and A. Beardmore and S. Campana and M. Capalbi and G. Chincarini and G. Cusumano and A. Falcone and N. Gehrels and P. Giommi and M. Goad and O. Godet and C. Hurkett and J. A. Kennea and A. Moretti and P. O'brien and J. Osborne and P. Romano and G. Tagliaferri and A. Wells},
  journal={The Astrophysical Journal},
  • J. Nousek, C. Kouveliotou, +25 authors A. Wells
  • Published 2006
  • Physics
  • The Astrophysical Journal
  • We present new observations of the early X-ray afterglows of the first 27 gamma-ray bursts (GRBs) well observed by 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: (1) an initial very steep decay (/t � � with 3P � 1 P5), followed by (2) a very shallow decay (0:5P � 2 P1:0), and finally (3) a somewhat steeper decay (1P � 3 P1:5). These power-law segments are separated by two… CONTINUE READING
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