Czerny 2010 BATSE的极短暴

主要内容:
短于0.1秒的暴。但是从空间分布等来看，可能也就是一般的短暴。

也许可以分析一下它们的spectral time lag，因为他们时标比较短，比较容易分辨。

精彩摘抄:


文章信息:

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Title:		Observational constraints on the nature of very short gamma-ray bursts
Authors:		Czerny, Bo\. zena; Janiuk, Agnieszka; Cline, David B.; Otwinowski, Stan
Publication:		eprint arXiv:1006.1470
Publication Date:		06/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		25 pages, 14 figures; accepted to New Astronomy
Bibliographic Code:		2010arXiv1006.1470C

Abstract

We discuss a very peculiar subgroup of gamma-ray bursts among the BATSE sources. These bursts are very short ($T_{90} \le $0.1 s), hard, and came predominantly from a restricted direction of the sky (close to the Galactic anti-center). We analyze their arrival times and possible correlations, as well as the profiles of individual bursts. We find no peculiarities in the arrival times of Very Short Bursts (VSBs) despite their highly non-uniform spatial distribution. There is no dependence in the burst shapes on location. Bursts coming both from the burst-enhancement Galactic Anticenter region and from all other directions show considerable dispersion in their rise and fall times. Significant fraction of VSBs have multiple peaks despite their extremely short duration. Burst time properties are most likely to be consistent with two origin mechanisms: either with binary NS-NS mergers with low total masses passing through a phase of hypermassive neutron star, or with evaporation of the primordial black holes in the scenario of no photosphere formation.

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