Redshift indicators for gamma-ray bursts

TL;DR

This paper reviews the development of luminosity-redshift indicators for gamma-ray bursts, which enable distance and luminosity measurements independent of redshift, aiding cosmological studies.

Contribution

It discusses the construction and application of gamma-ray burst luminosity indicators, highlighting their role in measuring distances without redshift data.

Findings

Luminosity indicators correlate with intrinsic properties of GRBs.

Pseudo-redshifts can be estimated from these indicators.

Applications include measuring luminosity distances independently of redshift.

Abstract

The measure of the distances and luminosities of gamma-ray bursts (GRBs) led to the discovery that many GRB properties are strongly correlated with their intrinsic luminosity, leading to the construction of reliable luminosity indicators. These GRB luminosity indicators have quickly found applications, like the construction of 'pseudo-redshifts', or the measure of luminosity distances, which can be computed independently of the measure of the redshift. In this contribution I discuss various issues connected with the construction of luminosity-redshift indicators for gamma-ray bursts.