Verifing Gamma-Ray Burst Duration and Hardness Analysis Using the Compton Gamma-Ray Observatory T50 and H32 Data

Abstract

This study examines the duration and statistical characteristics of gamma-ray bursts (GRBs), with particular emphasis on data analysis techniques, background correction, and spectral hardness investigations. It discusses the impact of observational biases and explores the relationship between the temporal and spectral properties of GRBs. In addition to the T50 and T90 parameters, the analysis of spectral hardness distributions provides further insight into the physical origins and diversity of these events. The findings contribute to a more refined classification of GRBs and the improvement of astrophysical models, offering a methodological foundation for future analyses based on large datasets. The BATSE burst classification on the H32-T90 plane is well known in the literature. In our paper, we repeat this on the H32-T50 parameter plane. Our analysis confirms the result obtained in the H32-T90 analysis, that there is a third, intermediate duration group of bursts. These gamma-ray bursts typically have a softer spectrum than the members of the other two groups.