Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-11-08
Astrophys.J.646:1098-1103,2006
Astronomy and Astrophysics
Astrophysics
16 pages, 4 figure. Submitted on Oct. 21, 2005, accepted by ApJ
Scientific paper
10.1086/504965
By considering synchrotron radiative process in the internal shock model and assuming that all internal shocks are nearly equally energetic, we analyze the gamma-ray burst (GRB) emission at different radii corresponding to different observed times. We apply this model to GRB 050904 and find that our analytical results can provide a natural explanation for the multi-band observations of GRB 050904. This suggests that the X-ray flare emission and the optical emission of this burst could have originated from internal shocks being due to collisions among nearly-equally-energetic shells ejected from the central engine. Thus GRB 050904 appears to be a burst with super-long central engine activity.
Dai Gao Z.
Xu Dapeng
Zou Yuan-Chuan
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