Le 2008 GLAST探测率的唯象研究

主要内容:
以BATSE和EGRET的数据为基础，唯象地估计GLAST的探测率

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· arXiv e-print (arXiv:0807.0355)

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Title:		Gamma Ray Burst Predictions for GLAST
Authors:		Le, Truong; Dermer, Charles D.
Publication:		eprint arXiv:0807.0355
Publication Date:		07/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		5 pages, 7 figures, submitted to ApJ
Bibliographic Code:		2008arXiv0807.0355L

Abstract

We develop a phenomenological model to estimate the GRB full-sky detection rate by GLAST. This estimate is based on the BATSE GRB fluence distribution, the average EGRET ($\gtrsim$100 MeV) to BATSE ($\gtrsim 20$ keV) fluence ratio for the 5 EGRET spark chamber GRBs, and the mean EGRET GRB spectrum. For a 30% fluence ratio, we estimate a rate of $\approx 150$ ($\approx 10$) GRBs/yr full-sky with at least 5 photons with energy $E > 100$ MeV ($> 1$ GeV), and $\approx 5$ ($\approx 2$) GRBs/yr full-sky for at least 1 photon with energy $E >$ 5 GeV ($>$ 10 GeV). Comparison predictions for AGILE are made. Hard ($\gg 5$ GeV) SSC or photohadronic tails on GRBs, or GRBs with anomalous hard components, could increase the rates and would define separate classes of GRBs.

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