Gamma-ray burst groups observed by BATSE, Beppo-Sax and Swift

TL;DR

This paper reviews the classification of gamma-ray bursts observed by BATSE, Beppo-Sax, and Swift, providing evidence for a third, intermediate-duration group across all three satellites with similar properties.

Contribution

It demonstrates that all three satellites detect a third gamma-ray burst group, confirming the existence of an intermediate-duration class with consistent properties across datasets.

Findings

Detection of a third GRB group in all datasets

Similar properties of the third group across satellites

Confirmation of the intermediate-duration GRBs

Abstract

Short and long bursts were identified by the BATSE team in the early 90s. A decade ago there were some suggestions about the intermediate duration type of bursts. We are going to summarize recent analyses of the duration distributions of the Beppo-Sax and Swift data. Our conclusion is all the three satellites (CGRO, Swift, Beppo-Sax) can see the third type of the GRBs. The properties of the group members are very similar in the different data sets.