Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-10
AIPConf.Proc.727:403-407,2004
Astronomy and Astrophysics
Astrophysics
6 pages, 5 color figures. Proceedings of the 2003 GRB Conference (Santa Fe, NM, 2003 Sep 8-12). Needs aipprocs LaTeX class
Scientific paper
10.1063/1.1810874
We present spectroscopic and photometric observations of the afterglow of GRB 021211 and the discovery of its associated supernova, SN 2002lt. The spectrum shows a broad feature (FWHM = 150 A), around 3770 A (in the rest-frame of the GRB), which we interpret as Ca H+K blueshifted by 14400 km/s. Potential sources of contamination due to the host galaxy and/or residuals of telluric absorption have been analyzed and ruled out. Overall, the spectrum shows a suggestive resemblance with the one of the prototypical type-Ic SN 1994I. This might indicate that GRBs are produced also by standard type-Ic supernovae.
Antonelli Lucio Angelo
Benetti Stefano
Chincarini Guido
Cocozza Gabriele
Covino Stefano
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