Testing the Consistence of Gamma Ray Burst Data-set and Supernovae Union2

TL;DR

This study assesses the consistency between Gamma Ray Burst data and Supernovae Union2 data within the Lambda-CDM model, finding a slight inconsistency that impacts their combined use in cosmological constraints.

Contribution

It applies a multi-dimensional consistency test to evaluate the compatibility of GRB and SNU2 datasets under the Lambda-CDM model, highlighting potential issues in their joint analysis.

Findings

Inconsistency at 1.456 sigma level.

85.47% probability of inconsistency.

GRBs can still be combined with SNU2 for cosmological constraints.

Abstract

In this paper, we test the consistency of Gamma Ray Bursts (GRBs) Data-set and Supernovae Union2 (SNU2) via the so-called {\it multi-dimensional consistency test} under the assumption that $\Lambda$CDM model is a potentially correct cosmological model. We find that the probes are inconsistent with $1.456\sigma$ and $85.47%$ in terms of probability. With this observation, it is concluded that GRBs can be combined with SNU2 to constrain cosmological models.