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.

星期三, 一月 21, 2009

Ukwatta 2009 高红移"镜像"伽玛暴的可能性

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· arXiv e-print (arXiv:0901.2928)
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Title:
Investigating the Possibility of Screening High-z GRBs based on BAT Prompt Emission Properties
Authors:
Ukwatta, T. N.; Sakamoto, T.; Dhuga, K. S.; Parke, W. C.; Barthelmy, S. D.; Gehrels, N.; Stamatikos, M.; Tueller, J.
Publication:
eprint arXiv:0901.2928
Publication Date:
01/2009
Origin:
ARXIV
Keywords:
Astrophysics - High Energy Astrophysical Phenomena
Comment:
3 pages; Submitted to Proceedings of Huntsville 2008 Symposium on GRBs
Bibliographic Code:
2009arXiv0901.2928U

Abstract

Being able to quickly select among gamma-ray bursts (GRBs) seen by the Swift satellite those which are high-z candidates would give ground-based observers a better chance to determine a redshift for such distant GRBs. Information about these high-z GRBs is important in helping to resolve questions about the early universe such as the formation rate of high-z GRBs, the re-ionization period of the universe, the metallicity of the early universe, and the Hubble expansion. Initially using a sample of 51 GRBs with previously measured redshifts, we have developed high-z screening criteria employing the GRB spectral as well as temporal characteristics of the prompt emission from the Burst Alert Telescope (BAT) on Swift. Now that the sample has increased to 81 GRBs, we have revisited the screening criteria and our methodology. Our updated high-z screening criteria are presented in this paper.
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