The Comparison of the Swift Gamma-Ray Bursts With and Without Measured Redshifts

TL;DR

This study compares Swift gamma-ray bursts with and without measured redshifts, analyzing their durations, peak fluxes, and fluences, and finds no significant differences between the two groups.

Contribution

It provides a statistical comparison of properties of gamma-ray bursts with and without measured redshifts, highlighting their similarities.

Findings

No significant differences in durations, peak fluxes, or fluences.

Statistical tests show similar dispersions and means for both samples.

Redshift measurement does not significantly alter burst property distributions.

Abstract

Gamma-ray bursts, detected by the Swift satellite, are separated into two samples: the bursts with and without determined redshifts. These two samples are compared by the standard Student t-test and F-test. We have compared the dispersions and the mean values of the durations, peak fluxes and fluences in order to find any differences among these two samples. No essential differences were found.