Identification of GRB precursors in Fermi-GBM bursts
High Energy Astrophysical Phenomena
2020-11-18 v2
Abstract
We present an analysis of more than 11 years of Fermi-GBM data in which 217 Gamma-Ray Bursts (GRBs) are found for which their main burst is preceded by a precursor flash. We find that short GRBs (2 s) are ~10 times less likely to produce a precursor than long GRBs. The quiescent time profile is well described by a double Gaussian distribution, indicating that the observed precursors have two distinct physical progenitors. The light curves of the identified precursor GRBs are publicly available in an online catalog (https://icecube.wisc.edu/~grbweb_public/Precursors.html).
Cite
@article{arxiv.2004.03246,
title = {Identification of GRB precursors in Fermi-GBM bursts},
author = {Paul Coppin and Krijn D. de Vries and Nick van Eijndhoven},
journal= {arXiv preprint arXiv:2004.03246},
year = {2020}
}
Comments
Accepted for publication in Phys. Rev. D