Ukwatta 2008 高红移暴的辐射特性

主要内容:
把这些暴的T90, Epeak等画到一张图上。

精彩摘抄:


文章信息:

· arXiv e-print (arXiv:0802.3815)

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Title:		Screening High-z GRBs with BAT Prompt Emission Properties
Authors:		Ukwatta, T. N.; Sakamoto, T.; Stamatikos, M.; Gehrels, N.; Dhuga, K. S.
Publication:		eprint arXiv:0802.3815
Publication Date:		02/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		4 pages, 4 figures, to be published in the proceedings of ''Gamma Ray Bursts 2007'', Santa Fe, New Mexico, November 5-9
Bibliographic Code:		2008arXiv0802.3815U

Abstract

Detecting high-z GRBs is important for constraining the GRB formation rate, and tracing the history of re-ionization and metallicity of the universe. Based on the current sample of GRBs detected by Swift with known redshifts, we investigated the relationship between red-shift, and spectral and temporal characteristics, using the BAT event-by-event data. We found red-shift trends for the peak-flux-normalized temporal width T90, the light curve variance, the peak flux, and the photon index in simple power-law fit to the BAT event data. We have constructed criteria for screening GRBs with high red-shifts. This will enable us to provide a much faster alert to the GRB community of possible high-z bursts.

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