A simple empirical redshift indicator for gamma-ray bursts

Free access article

Issue		A&A Volume 407, Number 1, August III 2003


Page(s)		L1 - L4
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:20030958

A&A 407, L1-L4 (2003)
DOI: 10.1051/0004-6361:20030958

Letter

A simple empirical redshift indicator for gamma-ray bursts

J.-L. Atteia

Laboratoire d'Astrophysique, Observatoire Midi-Pyrénées, 31400 Toulouse, France
(Received 3 April 2003 / Accepted 23 June 203)

Abstract
We propose a new empirical redshift indicator for gamma-ray bursts. This indicator is easily computed from the gamma-ray burst spectral parameters and its duration, and it provides "pseudo-redshifts" accurate to a factor two. Possible applications of this redshift indicator are briefly discussed.

Key words: gamma-rays: bursts

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