Rubtsov 2010 重新分析LAT的数据发现了4个新的暴

主要内容:
在之前没有报道过它们的高能辐射，分别是：GRB 081009, GRB 090720B, GRB 100911 and GRB 100728A

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Title:		GRB observations by Fermi LAT revisited: new candidates found
Authors:		Rubtsov, G. I.; Pshirkov, M. S.; Tinyakov, P. G.
Publication:		eprint arXiv:1104.5476
Publication Date:		04/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		5 pages, 2 tables
Bibliographic Code:		2011arXiv1104.5476R

Abstract

We search the Fermi-LAT photon database for an extended gamma-ray emission which could be associated with any of the 581 previously detected gamma-ray bursts (GRBs) visible to the Fermi-LAT. For this purpose we compare the number of photons with energies E > 100 MeV and E > 1 GeV which arrived in the first 1500 seconds after the burst from the same region, to the expected background. We require that the expected number of false detections does not exceed 0.05 for the entire search and find the high-energy emission in 19 bursts, four of which (GRB 081009, GRB 090720B, GRB 100911 and GRB 100728A) were previously unreported. The first three are detected at energies above 100 MeV, while the last one shows a statistically significant signal only above 1 GeV.

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