伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期四, 八月 20, 2009

Crowther, Paul A 2009 通过SGR来限制短暴

主要内容:
因为应该说有一部分BATSE的短暴可能是SGR的giant flare

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文章信息:

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Title:
Contamination of short GRBs by giant magnetar flares: Significance of downward revision in distance to SGR 1806-20
Authors:
Crowther, Paul A; Bibby, Joanne L; Furness, James P; Clark, J Simon
Publication:
eprint arXiv:0908.2773
Publication Date:
08/2009
Origin:
ARXIV
Keywords:
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Comment:
5 pages, 4 figures, contributed talk from `Neutron Stars and Gamma Ray Bursts' (eds A. Ibrahim & J. Grindlay, AIP Conf Proc)
Bibliographic Code:
2009arXiv0908.2773C

Abstract

We highlight how the downward revision in the distance to the star cluster associated with SGR1806-20 by Bibby et al. reconciles the apparent low contamination of BATSE short GRBs by intense flares from extragalactic magnetars without recourse to modifying the frequency of one such flare per 30 years per Milky Way galaxy. We also discuss the variety in progenitor initial masses of magnetars based upon cluster ages, ranging from ~50 Msun for SGR 1806-20 and 1E 1647-455 in Westerlund 1 to ~15 Msun for SGR 1900+14 and presumably 1E 1841-045 if it originated from one of the massive RSG clusters #2 or #3.
Bibtex entry for this abstract Preferred format for this abstract (see Preferences)

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