Bagoly 2004 通过暴本身估算红移

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类似光学的photometric方法

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Title:		Redshifts of the Long Gamma-Ray Bursts
Authors:		Bagoly, Z.; Csabai, I.; Meszaros, A.; Meszaros, P.; Horvath, I.; Balazs, L. G.; Vavrek, R.
Publication:		eprint arXiv:0704.0864
Publication Date:		04/2007
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		published in Baltic Astronomy; Baltic Astron. 13 (2004) 227
Bibliographic Code:		2007arXiv0704.0864B

Abstract

The low energy spectra of some gamma-ray bursts' show excess components beside the power-law dependence. The consequences of such a feature allows to estimate the gamma photometric redshift of the long gamma-ray bursts in the BATSE Catalog. There is good correlation between the measured optical and the estimated gamma photometric redshifts. The estimated redshift values for the long bright gamma-ray bursts are up to z=4, while for the the faint long bursts - which should be up to z=20 - the redshifts cannot be determined unambiguously with this method. The redshift distribution of all the gamma-ray bursts with known optical redshift agrees quite well with the BATSE based gamma photometric redshift distribution.

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