GRB 021004 modelled by multiple energy injections
Astrophysics
2007-05-23 v1
Abstract
GRB 021004 is one of the best sampled gamma-ray bursts (GRB) to date, although the nature of its light curve is still being debated. Here we present a large amount (107) of new optical, near-infrared (NIR) and millimetre observations, ranging from 2 hours to more than a year after the burst. Fitting the multiband data to a model based on multiple energy injections suggests that at least 7 refreshed shocks took place during the evolution of the afterglow, implying a total energy release (collimated within an angle of 1.8 deg) of ~ 8x10^51 erg. Analysis of the late photometry reveals that the GRB 021004 host is a low extinction (Av ~ 0.1) starburst galaxy with M_B ~ -22.0.
Cite
@article{arxiv.astro-ph/0506544,
title = {GRB 021004 modelled by multiple energy injections},
author = {A. de Ugarte Postigo and A. J. Castro-Tirado and J. Gorosabel and G. Jóhannesson and G. Bjornsson and E. H. Gudmundsson and M. Bremer and S. Pak and N. Tanvir and J. M. Castro Cerón and S. Guzyi and M. Jelínek and S. Klose and D. Pérez-Ramírez and J. Aceituno and A. Campo Bagatín and S. Covino and N. Cardiel and T. Fathkullin and A. A. Henden and S. Huferath and Y. Kurata and D. Malesani and F. Mannucci and P. Ruiz-Lapuente and V. Sokolov and U. Thiele and L. Wisotzki and L. A. Antonelli and C. Bartolini and A. Boattini and A. Guarnieri and A. Piccioni and G. Pizzichini and M. del Principe and A. di Paola and D. Fugazza and G. Ghisellini and L. Hunt and T. Konstantinova and N. Masetti and E. Palazzi and E. Pian and M. Stefanon and V. Testa and P. J. Tristram},
journal= {arXiv preprint arXiv:astro-ph/0506544},
year = {2007}
}
Comments
9 pages, 5 figures, accepted for publication in A&Ax