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

We propose an improved version of the redshift indicator developed by Atteia, which gets rid of the dependence on the burst duration and provides better estimates for high‐redshift GRBs. We present first this redshift indicator, then its calibration with HETE‐GRBs with known redshifts. 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.