Computer Science
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ncimc..28..783w&link_type=abstract
Il Nuovo Cimento C, vol. 28, Issue 4, p.783
Computer Science
Scientific paper
We present the first high-resolution observations of the optical afterglow of a gamma-ray burst. The spectra show that the matter of the host galaxy in the circumburst region is complex, with many components contributing to each system. Also the presence of low- and high-ionisation lines allows rather strong constraints on the gas ionisation parameters of the various components to be derived. These can be interpreted as density fluctuations on top of a regular R-2 wind density profile.
Antonelli Lucio Angelo
Chincarini Guido
Covino Stefano
D'Elia Valerio
di Paola Andrea
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