On the "canonical behaviour" of the X-ray afterglows of the Gamma Ray   Bursts observed with Swift's XRT
  The "canonical behaviour" of the early X-ray afterglows of long-duration Gamma-Ray Bursts (GRBs) --observed by the X-Ray Telescope of the SWIFT satellite-- is precisely the one predicted by the Cannonball model of GRBs. 
Shlomo Dado, Arnon Dar and A. De Rujula