Different satellites - different GRB redshift distributions?

TL;DR

This study compares the redshift distributions of gamma-ray bursts detected by different satellites, revealing significant differences especially between Swift and HETE2, after accounting for observational biases.

Contribution

It provides a comparative analysis of GRB redshift distributions across multiple satellites, highlighting satellite-specific biases and differences.

Findings

Significant difference in redshift distributions between Swift and HETE2.

Biases influence the observed redshift distributions.

Swift tends to detect GRBs with higher redshifts.

Abstract

The measured redshifts of gamma-ray bursts (GRBs), which were first detected by the Swift satellite, seem to be bigger on average than the redshifts of GRBs detected by other satellites. We analyzed the redshift distribution of GRBs triggered and observed by different satellites (Swift[1], HETE2[2], BeppoSax, Ulyssses). After considering the possible biases significant difference was found at the p = 95.70% level in the redshift distributions of GRBs measured by HETE and the Swift.