Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
Astrophysics
2009-11-10 v2
Abstract
Using a simple uniform jet model of prompt emissions of gamma-ray bursts (GRBs), we reproduce the observed peak energy--isotropic energy relation. A Monte Carlo simulation shows that the low-isotropic energy part of the relation is dominated by events viewed from off-axis directions, and the number of the off-axis events is about one-third of the on-axis emissions. We also compute the observed event rates of the GRBs, the X-ray-rich GRBs, and the X-ray flashes detected by HETE-2, and we find that they are similar.
Cite
@article{arxiv.astro-ph/0401044,
title = {Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model},
author = {Ryo Yamazaki and Kunihito Ioka and Takashi Nakamura},
journal= {arXiv preprint arXiv:astro-ph/0401044},
year = {2009}
}
Comments
11 pages, 2 eps figures