ar X iv : 0 90 1 . 06 80 v 1 [ as tr o - ph . H E ] 6 J an 2 00 9 Is the Rapid Decay Phase from High Latitude Emission ?


There is good observationnal evidence that the Steep Decay Phase (SDP) that is observed in most Swift GRBs is the tail of the prompt emission. The most popular model to explain the SDP is Hight Latitude Emission (HLE). Many models for the prompt emission give rise to HLE, like the popular internal shocks (IS) model, but some models do not, such as sporadic… (More)


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