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Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..679g&link_type=abstract
SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret
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Scientific paper
X-shooter is a second generation VLT instrument whose construction has been approved by ESO council in October 2003. It will be realized by a consortium formed by Institutes from four countries: Denmark, Italy, The Netherlands and France, and ESO. It is a two-dimensional wide-band single target spectrograph covering in a single exposure the spectral range from the UV to H band (0.32 to 1.9 microns). The instrument is designed to maximize the sensitivity in this spectral range and to allow a fast response to transient sources with unknown spectral distribution. It operates at intermediate resolution (R~10000) which is sufficient to address quantitatively many astrophysical questions. Gamma-ray Bursts and Type Ia Supernovae, along with their host galaxies, are among the main scientific objectives of X-Shooter. Thanks to its fast response, high efficiency and high sensitivity, X-Shooter will observe these rapidly varying objects with unprecedented precision. Its sensitivity allows to detect type Ia Supernovae up to redshift 1.7. Moreover an early detection of a high-redshift gamma-ray burst with X-shooter will allow to study the Star Formation Rate at redshifts that cannot be probed otherwise. I will discuss X-shooter main characteristics, the French contribution to the project and the main scientific questions that will be investigated with this new instrument.
Filliatre Ph.
Goldoni Paolo
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