Xue, R. R. 2009 近处伽玛暴的超高能射线

主要内容:
远的由于和红外背景光子散射不能到达地球, 估算了近的, 大多也在Cherenkov探测器的阈值以下.

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Title:		Very High Energy Gamma-ray Afterglow Emission of Nearby Gamma-ray Bursts
Authors:		Xue, R. R.; Tam, P. H.; Wagner, S. J.; Behera, B.; Fan, Y. Z.; Wei, D. M.
Publication:		eprint arXiv:0907.4014
Publication Date:		07/2009
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		9 pages,5 figure,2 tables,accepted for publication in ApJ
Bibliographic Code:		2009arXiv0907.4014X

Abstract

The synchrotron self-Compton (SSC) emission from Gamma-ray Burst (GRB) forward shock can extend to the very-high-energy (VHE; $E_\gamma > $100 GeV) range. Such high energy photons are rare and are attenuated by the cosmic infrared background before reaching us. In this work, we discuss the prospect to detect these VHE photons using the current ground-based Cherenkov detectors. Our calculated results are consistent with the upper limits obtained with several Cherenkov detectors for GRB 030329, GRB 050509B, and GRB 060505 during the afterglow phase. For 5 bursts in our nearby GRB sample (except for GRB 030329), current ground-based Cherenkov detectors would not be expected to detect the modeled VHE signal. Only for those very bright and nearby bursts like GRB 030329, detection of VHE photons is possible under favorable observing conditions and a delayed observation time of $\la$10 hours.

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