Modelling GRB021004 by multiple energy injections
- de Ugarte Postigo, A.
- Gorosabel, J.
- Castro-Tirado, A. J.
- Jóhannesson, G.
- Björnsson, G.
- Gudmundsson, E. H.
- Bremer, M.
- Castro Cerón, J. M.
- Guzyi, S.
- Jelínek, M.
- Pérez-Ramirez, D.
Publication date
January 2005
DOI Publisher
Societa italiana di fisica Language
EnglishAbstract
GRB021004 is one of the best sampled gamma-ray bursts (GRB) todate, however the nature of its light curve is still being debated. A compilation of multiwavelength (from radio to X-rays) observations, including unpublished optical/near-infrared and millimetre observations, is used to fit a model based on 7 refreshed shocks that took place during the evolution of the afterglow. They imply a total energy release of ∼ 8 × 1051 erg. Analysis of the late photometry reveals that the GRB021004 host is a low extinction (AV ∼ 0.1) starburst galaxy with MB � −22.0
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