Multiple Sub-Jet Model of Gamma Ray Bursts and Possible Origin of X-ray Precursors and Post-cursors

Takashi Nakamura

We assume that internal shocks of Gamma Ray Bursts (GRBs) consist of multiple sub-jets with a collimation half-angle $\sim \mathrm{several}\times {\gamma }_i^{-1}$, where ${\gamma }_i$ is the Lorenz…