Owing to some refinements in the dynamics, we can follow the overall evolution of a realistic jet numerically until its bulk velocity is as small as βc ∼ 10-3c. We find no obvious break in the optical light curve during the relativistic phase itself. However, an obvious break does exist at the transition from the relativistic phase to the non-relativistic phase, which typically occurs at time t ∼ 106-106.5 s (i.e. 10-30 d). The break is affected by many parameters, such as the electron energy fraction ξ
Huang Y. F.;Dai Z. G.;Lu T.
Monthly Notices of the Royal Astronomical Society
2000