An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission

Details An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission

2006-01-07

arxiv.org/abs/astro-ph/0601150v1

Astronomy and Astrophysics

Astrophysics

To appear in the proceedings of the 16th Annual October Astrophysics Conference in Maryland, "Gamma Ray Bursts in the Swift Er

Scientific paper

10.1063/1.2207877

We propose an improved version of the redshift indicator developed by Atteia (2003), which gets rid of the dependence on the burst duration and provides better estimates for high-redshift GRBs. We present the derivation and the definition of this redshift indicator, then its calibration with 17 GRBs with known redshifts detected by HETE-2 and 2 more detected by Konus-Wind. We also provide an estimation of the redshift for 59 bursts, and we finally discuss the redshift distribution of HETE-bursts and the possible other applications of this redshift indicator.

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