标题： GRB 050904 是否是一个超长暴？ 显示英文标题

标题： Is GRB 050904 a super-long burst?

摘要： 通过考虑内激波模型中的同步辐射过程，并假设所有的内激波具有近似相等的能量，我们分析了伽马射线暴（GRB）在不同半径处的发射，这些半径对应于不同的观测时间。 我们将该模型应用于GRB 050904，并发现我们的解析结果能够自然地解释GRB 050904的多波段观测结果。 这表明此爆发的X射线闪发和光学发射可能起源于内部激波，这些激波是由于从中心引擎喷出的几乎等能外壳之间的碰撞引起的。 因此，GRB 050904似乎是一个具有超长中心引擎活动的爆发。 显示英文摘要

摘要： 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.