Comparing the observed properties of the GRBs detected by the Fermi and Swift satellites

TL;DR

This study compares properties of GRBs detected by Fermi and Swift satellites, revealing differences in Fluence and duration linked to observational strategies, with implications for understanding GRB characteristics.

Contribution

It provides a comparative analysis of GRB properties observed by Fermi and Swift, highlighting how observational strategies influence detected GRB features.

Findings

Fermi and Swift GRBs show similar Peak flux and Peak energy.

Swift-detected GRBs have greater Fluence and duration.

Differences are due to satellite observational strategies.

Abstract

We studied the distribution of the GRBs, observed by the Fermi satellite, in the multidimensional parameter space consisting of the duration, Fluence, Peak flux and Peak energy (if it was available). About 10% of the Fermi bursts was observed also by the Swift satellite. We did not find significant differences between the Peak flux and Peak energy of GRBs observed and not observed also by the Swift satellite. In contrast, those GRBs detected also by the Swift satellite had significantly greater Fluence and duration. We did a similar study for the GRBs detected by the Swift satellite. About 30% percent of these bursts was also measured by the Fermi satellite. We found a significant difference in the Fluence, Peak flux and Photon index but none in duration. These differences may be accounted for the different construction and observing strategy of the Fermi and Swift satellites.