A comparison of the gamma-ray bursts detected by BATSE and Swift

TL;DR

This study statistically analyzes 388 gamma-ray bursts detected by Swift to identify subgroups and compares these findings with earlier BATSE data, confirming the existence of short, long, and intermediate groups.

Contribution

It provides a comparative analysis of GRB subgroups detected by Swift and BATSE, confirming the presence of three distinct groups across datasets.

Findings

Short, long, and intermediate subgroups are detected in Swift data.

The three-subgroup classification is supported by the Swift sample.

Results are consistent with previous BATSE findings.

Abstract

The durations of 388 gamma-ray bursts, detected by the Swift satellite, are studied statistically in order to search for their subgroups. Then the results are compared with the results obtained earlier from the BATSE database. The standard chi^2 test is used. Similarly to the BATSE database, the short and long subgroups are well detected also in the Swift data. Also the intermediate subgroup is seen in the Swift database. The whole sample of 388 GRBs gives a support for three subgroups.