The VIRMOS deep imaging survey: III. ESO/WFI deep U-band imaging of the 0226-04 deep field

Journal
Date Issued
2004
Author(s)
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Arnaboldi, M.
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Massarotti, M.
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McCracken, H. J.
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Mellier, Y.
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Bertin, E.
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Adami, C.
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Le Fevre, O.
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Foucaud, S.
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•
•
•
•
DOI
Abstract
In this paper we describe the U-band imaging of the F02 deep field, one of the fields in the VIRMOS Deep Imaging Survey. The observations were done at the ESO/MPG 2.2m telescope at La Silla (Chile) using the 8k x 8k Wide-Field Imager (WFI). The field is centered at alpha(J2000)=02h 26m 00s and delta(J2000)=-04deg 30' 00", the total covered area is 0.9 deg**2 and the limiting magnitude (50% completeness) is U(AB) ~ 25.4 mag. Reduction steps, including astrometry, photometry and catalogue extraction, are first discussed. The achieved astrometric accuracy (RMS) is ~ 0.2" with reference to the I-band catalog and ~ 0.07" internally (estimated from overlapping sources in different exposures). The photometric accuracy including uncertainties from photometric calibration, is < 0.1 mag. Various tests are then performed as a quality assessment of the data. They include: (i) the color distribution of stars and galaxies in the field, done together with the BVRI data available from the VIMOS survey; (ii) the comparison with previous published results of U-band magnitude-number counts of galaxies.
Volume
417
Issue
1
Start page
51
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
2004A&A...417...51R
Rights
open.access
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