GRB 080129后期内震产生的光学/红外耀斑
Optical/infrared flares of GRB 080129 from late internal shocks
摘要：
在GRB 080129的余辉中发现了强烈的光学和近红外（NIR）耀斑。它们的时间行为，即突然出现和迅速消失，与许多X射线耀斑（如GRB 050502 B的巨型耀斑）的时间行为非常相似。我们认为GRB 080129之后的光学/近红外耀斑是X射线耀斑的低能类比，最可能的解释是“晚期内部激波模型”。在这个模型中，GRB 080129的光学/近红外耀斑的持续时间和发生时间之间的非常小的比值和非常急剧的下降都可以很自然地解释。耀斑外流的初始洛伦兹因子为$\sim 30$，与前向激波余辉模型设定的约束$\leq 120$一致。其他的可能性，如反向冲击辐射或辐射的持续，但越来越弱的碰撞之间的初始伽玛射线暴流出的材料，是不赞成的。
英文摘要：
Strong optical and near-infrared (NIR) flares were discovered in the afterglow of GRB 080129. Their temporal behaviors, the sudden emergence and the quick disappearance, are rather similar to that of many X-ray flares (for instance, the giant flare of GRB 050502B). We argue that the optical/NIR flares following GRB 080129 are a low energy analogy of the X-ray flares and the most likely interpretation is the "late internal shock model". In this model, both the very sharp decline and the very small ratio between the duration and the occurrence time of the optical/NIR flares in GRB 080129 can be naturally interpreted. The initial Lorentz factor of the flare outflow is found to be $\sim 30$, consistent with the constraint $\leq 120$ set by the forward shock afterglow modeling. Other possibilities, like the reverse shock emission or the radiation from the continued but weaker and weaker collision between the initial GRB outflow material, are disfavored.
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