We propose here a pseudo-redshift calculator for long Gamma-Ray Bursts, based on the spectral parameters of the prompt emission, that anyone can use, just taking carefully into account the following description of this redshift indicator, in order not to use it in a wrong way...

As this redshift indicator requires only the data on the prompt emission, its main goal is to provide a quick redshift-estimate of recently detected GRBs, in order to rapidly inform the community via the Gamma-ray burst Coordinate Network (GCN) whether this burst seems to be at low or high-redshift.

Our main goal in making public this tool is to allow the quick classification of GRBs in one of the three categories: low, intermediate or high redshift, in order to adapt the follow-up strategy.

A. Pélangeon & J-L. Atteia

Complementary informations:
—   Affiliation: Laboratoire d'Astrophysique de Toulouse-Tarbes, Université de Toulouse, CNRS, 14 avenue Edouard Belin, 31400 Toulouse, France.
—   This site is hosted at the Laboratoire d'Astrophysique - Observatoire Midi-Pyrénées, Toulouse, France.
—   Acknowledgements: We are grateful to the informatic department team: P.Saby, C.Bombail, N.Perez and F. Soulier to have made possible the installation of this site.
—   The links of the references cited are provided by the NASA Astrophysics Data System (ADS).
—   The version of the pseudo-redshift computation program is: 2.1 (jan. 2006) and is run using (GNU Octave) software version 2.1.73.
—   It is the version 2 of the Interactive Pseudo-redshift Calculator for GRBs .
—   Web page update: Apr. 30, 2009 -- Last burst added in Catalog 2: GRB 090427

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