| Abstract: | Recently, several new correlations between the observed $\gamma$-ray and
X-ray properties of gamma-ray bursts (GRBs) were discovered from a
comprehensive analysis of the X-ray light curves of more than 650 GRBs
measured with the Swift X-ray telescope (Swift/XRT) during the years
2004-2010. Like previously well established correlations, they challenge
GRB models. Here we show that in the cannonball (CB) model of GRBs, the
newly discovered correlations and those that follow from them, have the
same simple kinematic origin as those discovered earlier. They result from
the strong dependence of the observed radiations on the bulk motion
Lorentz and Doppler factors of the jet of highly relativistic plasmoids
(CBs) that produces these radiations by interaction with the medium
through which it propagates. |
