Zou 2008 GRB 080319B及其他几个暴的高能辐射

主要内容:
高能的辐射如果只考虑逆康普顿散射的话, 可能存在:
1. 内激波IC. 如果光学和伽玛射线来源不同的话, 可能有光学光子被伽玛区的电子IC； 伽玛光子被光学区的电子IC. 但二者自己的SSC的可能性不大, 光学区的能量太低, 2nd IC可能性更小； 伽玛区的直接到了KN区而被抑制.
2. 正反激波阶段的EIC. 主要可能是prompt阶段的光学光子被正向激波电子IC； 和伽玛光子被反向激波的电子IC. 二者内部的SSC可能性比较小, 不过也有可能.
3. 外激波的SSC.

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文章信息:

· arXiv e-print (arXiv:0811.2997)

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Title:		Expected high energy emission from GRB 080319B and origins of the GeV emission of GRBs 080514B, 080916C and 081024B
Authors:		Zou, Yuan-Chuan; Fan, Yi-Zhong; Piran, Tsvi
Publication:		eprint arXiv:0811.2997
Publication Date:		11/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		8 pages, including 3 figures and 1 table
Bibliographic Code:		2008arXiv0811.2997Z

Abstract

We calculate the high energy (sub-GeV to TeV) prompt and afterglow emission of GRB 080319B that was distinguished by a naked-eye optical flash and by an unusual strong early X-ray afterglow. There are three possible sources for high energy emission: the prompt optical and $\gamma$-ray photons IC scattered by the internal shock electrons, the prompt photons IC scattered by the early external reverse-forward shock electrons, and the higher band of the synchrotron and the synchrotron self-Compton emission of the external shock. There should have been in total $\sim 500$ high energy photons detectable for the Large Area Telescope (LAT) onboard the Fermi satellite, and $> 30$ photons of those with energy $> 10$ GeV. The $> 10$ GeV emission had a duration about twice that of the soft $\gamma$-rays. AGILE could have observed these energetic signals if it was not occulted by the Earth at that moment. The physical origins of the high energy emission detected in GRB 080514B, GRB 080916C and GRB 081024B are also discussed. These observations can be reasonably interpreted by available high energy emission models based on our current understanding of GRBs and afterglows.

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