Gamma-ray bursts (GRBs) can be classified with their linearly dependent parameters alongside the standard T90 distribution. The Generalized linear mixture model(GLM) identifies the number of linear dependencies in a two-parameter space. Classically, GRBs are classified into two classes by the presence of bimodality in the histogram of T90. However, additional classes and sub-classes of GRBs are fascinating topics to explore. In this work, we investigate the GRBs classes in the T90−T50 plane using the Generalized Linear Models(GLM) for Fermi GBM and BATSE catalogs. This study shows five linear features for the Fermi GBM catalog and four linear features for the BATSE catalog, directing towards the possibility of more than two GRB classes.
@article{arxiv.2305.03947,
title = {Generalized Linear Models of T$_{90}$-T$_{50}$ relation to classify GRBs},
author = {Sourav Dutta and Sunanda and Reetanjali Moharana and Manish Kumar},
journal= {arXiv preprint arXiv:2305.03947},
year = {2023}
}