Imerito 2008 用将来的EXIST观测低光度的暴

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Title:		Probing the low-luminosity GRB population with new generation satellite detectors
Authors:		Imerito, A.; Coward, D.; Burman, R.; Blair, D.
Publication:		eprint arXiv:0808.4044
Publication Date:		08/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		6 pages, 4 figures, accepted by MNRAS
Bibliographic Code:		2008arXiv0808.4044I

Abstract

We compare the detection rates and redshift distributions of low-luminosity (LL) GRBs localized by Swift with those expected to be observed by the new generation satellite detectors on GLAST (now Fermi) and, in future, EXIST. Although the GLAST burst telescope will be less sensitive than Swift's in the 15--150 keV band, its large field-of-view implies that it will double Swift's detection rate of LL bursts. We show that Swift, GLAST and EXIST should detect about 1, 2 & 30 LL GRBs, respectively, over a 5-year operational period. The burst telescope on EXIST should detect LL GRBs at a rate of more than an order of magnitude greater than that of Swift's BAT. We show that the detection horizon for LL GRBs will be extended from $z \simeq 0.4$ for Swift to $z \simeq 1.1$ in the EXIST era. Also, the contribution of LL bursts to the observed GRB redshift distribution will contribute to an identifiable feature in the distribution at $z \simeq 1$.

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