Volume 482, Number 1, April IV 2008
|Page(s)||81 - 95|
|Published online||25 February 2008|
The VIMOS VLT deep survey*
The K-band follow-up in the 0226-04 field
Laboratoire AIM, CEA/DSM – CNRS – Université Paris Diderot, IRFU/SAp, 91191 Gif-sur-Yvette, France e-mail: firstname.lastname@example.org
2 INAF – Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy
3 INAF – Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
4 Institut d'Astrophysique de Paris, UMR 7095, 98 bis Bvd Arago, 75014 Paris, France
5 Observatoire de Paris, LERMA, 61 Avenue de l'Observatoire, 75014 Paris, France
6 IASF-INAF, via Bassini 15, 20133 Milano, Italy
7 Laboratoire d'Astrophysique de Marseille, UMR 6110 CNRS-Université de Provence, BP 8, 13376 Marseille Cedex 12, France
8 Laboratoire d'Astrophysique de Toulouse/Tabres (UMR5572), CNRS, Université Paul Sabatier, Toulouse III, Observatoire Midi-Pyrénées, 14 Av. E. Belin, 31400 Toulouse, France
9 IRA-INAF, via Gobetti 101, 40129 Bologna, Italy
10 INAF – Osservatorio Astronomico di Roma, via di Frascati 33, 00040 Monte Porzio Catone, Italy
11 Max Planck Institut fur Astrophysik, 85741 Garching, Germany
12 Universitá di Milano-Bicocca, Dipartimento di Fisica, Piazza delle Scienze 3, 20126 Milano, Italy
13 School of Physics & Astronomy, University of Nottingham, University Park, Nottingham, NG72RD, UK
14 Astrophysical Institute Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
15 Institute for Astronomy, 2680 Woodlawn Dr., University of Hawaii, Honolulu, Hawaii 96822, USA
16 Università di Bologna, Dipartimento di Astronomia, via Ranzani 1, 40127 Bologna, Italy
17 Centre de Physique Théorique, UMR 6207 CNRS-Université de Provence, 13288 Marseille, France
18 Integral Science Data Centre, Ch. d'Écogia 16, 1290 Versoix, Switzerland
19 Geneva Observatory, Ch. des Maillettes 51, 1290 Sauverny, Switzerland
20 INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy
21 Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Accepted: 1 February 2008
Aims. We present a new Ks-band survey that represents a significant extension to the previous wide-field Ks-band imaging survey within the 0226-04 field of the VIMOS-VLT deep survey (VVDS). The new data add ~458 arcmin2 to the previous imaging program, thus allowing us to cover a total contiguous area of ~600 arcmin2 within this field.
Methods. Sources were identified both directly on the final K-band mosaic image and on the corresponding, deep image from the CFHT Legacy Survey in order to reduce contamination, while ensuring compilation of a truly K-selected catalogue down to the completeness limit of the Ks-band. The newly determined Ks-band magnitudes are used in combination with the ancillary multiwavelength data for determining accurate photometric redshifts.
Results. The final catalogue totals ~52 000 sources, out of which ~4400 have a spectroscopic redshift from the VVDS first epoch survey. The catalogue is 90% complete down to = 20.5 mag. We present Ks-band galaxy counts and angular correlation function measurements down to this magnitude limit. Our results are in good agreement with previously published work. We show that using K magnitudes to determine photometric redshifts significantly lowers the incidence of catastrophic errors. The data presented in this paper are publicly available through the CENCOS database.
Key words: infrared: galaxies / galaxies: general / surveys / cosmology: large-scale structure of Universe
Based on observations collected at the European Southern Observatory New Technology Telescope, La Silla, Chile, programme 075.A-0752(A), on data obtained with the European Southern Observatory Very Large Telescope, Paranal, Chile, programme 070.A-9007(A), and on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT), which is operated by the National Research Council (NRC) of Canada, the Institut National des Science de l'Univers of the Centre National de la Recherche Scientifique (CNRS) of France, and the University of Hawaii. This work is based in part on data products produced at TERAPIX and the Canadian Astronomy Data Centre as part of the Canada-France-Hawaii Telescope Legacy Survey, a collaborative project of NRC and CNRS.
© ESO, 2008
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