GRB 021004 modelled by multiple energy injections
Open Access
- 15 November 2005
- journal article
- research article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 443 (3) , 841-849
- https://doi.org/10.1051/0004-6361:20052898
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 107 new optical, near-infrared (NIR) and millimetre observations, ranging from 2 h 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 18) of ~ erg. Analysis of the late photometry reveals that the GRB 021004 host is a low extinction () starburst galaxy with .Keywords
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