Evidence for isotropic emission in GRB991216
Astrophysics
2009-11-10 v3
Abstract
The issue of the possible presence or absence of jets in GRBs is here re-examined for GRB991216. We compare and contrast our theoretically predicted afterglow luminosity in the 2-10 keV band for spherically symmetric versus jetted emission. At these wavelenghts the jetted emission can be excluded and data analysis confirms spherical symmetry. These theoretical fits are expected to be improved by the forthcoming data of the Swift mission.
Cite
@article{arxiv.astro-ph/0503268,
title = {Evidence for isotropic emission in GRB991216},
author = {Remo Ruffini and Maria Grazia Bernardini and Carlo Luciano Bianco and Pascal Chardonnet and Federico Fraschetti and She-Sheng Xue},
journal= {arXiv preprint arXiv:astro-ph/0503268},
year = {2009}
}
Comments
6 pages, 1 figure, to appear on Advances in Space Research (in the Proceedings of the 35th COSPAR scientific assembly). New version to fit into the limit of 6 pages and to fix the format of the reference list