Is GRB 050904 a super-long burst?

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  • 8 November 2005
Abstract
In the basis of the internal shock model and synchrotron radiative process and under the assumption that all internal shocks are nearly equally energetic, we analyse the emission at different radii, which correspond to different observed times. Surprisingly, our analytical results can provide a natural explanation for the multi-band observations of GRB 050904. This implies that the violently variated X-ray emission and the optical emission of the burst originated from internal shocks, with the energy of ejected shells from the central engine that didn't decrease until the X-ray emission faded away. So we suggest that GRB 050904 is a burst with super-long central engine activity.

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