Troja 2010 短暴的前兆

主要内容:
找Swift短暴的前兆，大约10%有。
前兆和暴本身没有很大的区别，有和没有前兆的暴之间也没什么区别。

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一个例子

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Title:		Precursors of short gamma-ray bursts
Authors:		Troja, Eleonora; Rosswog, Stephan; Gehrels, Neil
Publication:		eprint arXiv:1009.1385
Publication Date:		09/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		8 pages, 2 figures, accepted for publication in The Astrophysical Journal
Bibliographic Code:		2010arXiv1009.1385T

Abstract

We carried out a systematic search of precursors on the sample of short GRBs observed by Swift. We found that ~8-10% of short GRBs display such early episode of emission. One burst (GRB 090510) shows two precursor events, the former ~13 s and the latter ~0.5 s before the GRB. We did not find any substantial difference between the precursor and the main GRB emission, and between short GRBs with and without precursors. We discuss possible mechanisms to reproduce the observed precursor emission within the scenario of compact object mergers. The implications of our results on quantum gravity constraints are also discussed.

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