Some Recent Peculiarities of the Early Afterglow
Astrophysics
2009-11-10 v1
Abstract
We consider some recent developments in GRB/afterglow observations: (i) the appearance of a very hard prompt component in GRB 941017, and (ii) variability in the early afterglow light curves of GRB 021004 and GRB 030329. We show that these observations fit nicely within the internal-external shocks model. The observed variability indicates that the activity of the inner engine is more complicated than was thought earlier and that it involves patchy shells and refreshed shocks. We refute the claims of Berger et al. and of Sheth et al. that the radio and mm observations of GRB 030329 are inconsistent with refreshed shocks.
Cite
@article{arxiv.astro-ph/0312138,
title = {Some Recent Peculiarities of the Early Afterglow},
author = {Tsvi Piran and Ehud Nakar and Jonathan Granot},
journal= {arXiv preprint arXiv:astro-ph/0312138},
year = {2009}
}
Comments
6 pages; Talk given by Tsvi Piran at the Gamma-Ray Burst Symposium, Santa Fe, NM 8-12 Spet 2003