Is GRB 050904 a super-long burst?

Abstract

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.

arXiv comment16 pages, 4 figure. Submitted on Oct. 21, 2005, accepted by ApJ

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• High energy gamma-ray emission from Gamma-Ray Bursts -- before GLAST
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• Gamma-ray burst afterglows
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• X-Ray and high energy flares from late internal shocks of gamma-ray bursts
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