| Issue |
EAS Publications Series
Volume 61, 2013
Gamma-ray Bursts: 15 Years of GRB Afterglows – Progenitors, Environments and Host Galaxies from the Nearby to the Early Universe
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|---|---|---|
| Page(s) | 407 - 411 | |
| Section | Chapter IX: Host Galaxies | |
| DOI | https://doi.org/10.1051/eas/1361065 | |
| Published online | 22 July 2013 | |
A.J. Castro-Tirado, J.Gorosabel and I.H. Park (eds)
EAS Publications Series, 61 (2013) 407-411
X-shooter slit observations of GRB host galaxies
1 INAF, Osservatorio Astronomico di
Brera, via E. Bianchi
46, 23807
Merate,
Italy
2 GEPI, Observatoire de Paris,
CNRS, Univ. Paris Diderot, 5 place
Jules Janssen, 92195
Meudon,
France
The Italian-French X-shooter GRB host program started at the end of 2009 and allowed us to collect the spectra of about 30 host galaxies in the 300–2400 nm range from a redshift of about z = 0.1 to z = 2.7. We are using these spectra to retrieve information on the host metallicities, star formation rates and extinctions. An accurate slit positioning allowed us to discover in some cases close-by galaxies at the same redshift than the GRB host. Thanks to the comparison of the afterglow and host spectra, it is possible to assess for possible interactions of these systems. We also looked for the counterparts of the foreground absorbers present in the afterglow spectra, but we obtained very few identifications.
© EAS, EDP Sciences 2013