Volume 594, October 2016
|Number of page(s)||26|
|Section||Catalogs and data|
|Published online||18 October 2016|
1 Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
2 INAF–Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste, Italy
3 Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 1A1, Canada
4 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
5 Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
6 Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
7 Max-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, Germany
8 INFN / National Institute for Nuclear Physics, via Valerio 2, 34127 Trieste, Italy
9 Observatoire de Genève, Université de Genève, 51, Ch. des Maillettes, 1290 Sauverny, Switzerland
10 Institute of Astronomy and Kavli Institute of Cosmology, Madingley Road, Cambridge CB3 0HA, UK
11 Department of Astronomy, University of Florida, Gainesville, FL 32611-2055, USA
12 International Center for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy
13 Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA
14 International School for Advanced Studies (SISSA) via Bonomea 265, 34136 Trieste, Italy
15 Department of Astronomy and Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
16 Unidad Asociada Grupo Ciencias Planetarias (UPV/EHU, IAA-CSIC), Departamento de Física Aplicada I, E.T.S. Ingeniería, Universidad del País Vasco (UPV/EHU), Alameda de Urquijo s/n, 48013 Bilbao, Spain
17 Ikerbasque, Basque Foundation for Science, Alameda de Urquijo 36-5, 48008 Bilbao, Spain
18 Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, 18008, Granada, Spain
19 Department of Astronomy and Steward Observatory University of Arizona, 933 N Cherry Avenue Tucson AZ 85721, USA
20 Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany
Received: 19 January 2016
Accepted: 22 July 2016
We describe the execution and data reduction of the European Southern Observatory Large Programme “Quasars and their absorption lines: a legacy survey of the high-redshift Universe with VLT/X-shooter” (hereafter “XQ-100”). XQ-100 has produced and made publicly available a homogeneous and high-quality sample of echelle spectra of 100 quasars (QSOs) at redshifts z ≃ 3.5–4.5 observed with full spectral coverage from 315 to 2500 nm at a resolving power ranging from R ~ 4000 to 7000, depending on wavelength. The median signal-to-noise ratios are 33, 25 and 43, as measured at rest-frame wavelengths 1700, 3000 and 3600 Å, respectively. This paper provides future users of XQ-100 data with the basic statistics of the survey, along with details of target selection, data acquisition and data reduction. The paper accompanies the public release of all data products, including 100 reduced spectra. XQ-100 is the largest spectroscopic survey to date of high-redshift QSOs with simultaneous rest-frame UV/optical coverage, and as such enables a wide range of extragalactic research, from cosmology and galaxy evolution to AGN astrophysics.
Key words: surveys / quasars: general
Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 189.A-0424.
The XQ-100 raw data and the XQ-100 Science Data Products can be found at http://archive.eso.org/eso/eso_archive_main.html and http://archive.eso.org/wdb/wdb/adp/phase3_main/form, respectively.
© ESO, 2016
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