Redshift and spatial distribution of the intermediate gamma-ray bursts

TL;DR

This paper investigates the redshift and spatial distribution of intermediate gamma-ray bursts, revealing they are farther than short bursts but closer than long bursts, based on observed redshifts.

Contribution

It provides the first analysis of redshift and spatial distribution specifically for intermediate GRBs using observed data.

Findings

Intermediate GRBs are farther than short bursts

Intermediate GRBs are closer than long bursts

Redshift distribution supports classification into three groups

Abstract

One of the most important task of the Gamma-Ray Burst field is the classification of the bursts. Many researches have proven the existence of the third kind (intermediate duration) of GRBs in the BATSE data. Recent works have analyzed BeppoSax and Swift observations and can also identify three types of GRBs in the data sets. However, the class memberships are probabilistic we have enough observed redshifts to calculate the redshift and spatial distribution of the intermediate GRBs. They are significantly farther than the short bursts and seems to be closer than the long ones.