Issue |
A&A
Volume 449, Number 2, April II 2006
|
|
---|---|---|
Page(s) | 837 - 854 | |
Section | Online catalogs and data | |
DOI | https://doi.org/10.1051/0004-6361:20053785 | |
Published online | 21 March 2006 |
ESO imaging survey: optical follow-up of 12 selected XMM-Newton fields
1
Institut für Astrophysik und extraterrestrische Forschung, University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany e-mail: dietrich@astro.uni-bonn.de
2
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching b. München, Germany
3
Copenhagen University Observatory, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
4
Observatoire de la Côte d'Azur, Laboratoire Cassiopée, BP4229, 06304 Nice Cedex 4, France
5
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
6
Dipartimento di Astronomia, Università di Bologna, via Ranzani 1, 40126 Bologna, Italy
7
Istituto di Radioastronomia, INAF, via Gobetti 101, 40129 Bologna, Italy
8
Observatoire Astronomique, CNRS UMR 7550, 11 rue de l'Université, 67000 Strasbourg, France
9
Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
10
Osservatorio Astronomico di Trieste, via G. B. Tiepolo, 11, 34131 Trieste, Italy
Received:
7
July
2005
Accepted:
3
October
2005
This paper presents the data recently released for the
XMM-Newton/WFI survey carried out as part of the ESO Imaging Survey (EIS) project. The aim of this survey is to provide optical imaging follow-up data in for identification of serendipitously detected X-ray sources in selected XMM-Newton fields. In this paper, fully
calibrated individual and stacked images of 12 fields as well as
science-grade catalogs for the 8 fields located at high-galactic
latitude are presented. These products were created, calibrated and
released using the infrastructure provided by the EIS Data Reduction
system and its associated EIS/MVM image processing engine, both of
which are briefly described here. The data covers an area of ~3 square degrees for each of the four passbands. The median seeing as measured in the final stacked images is
, ranging from
and
. The median limiting magnitudes (AB system, 2´´ aperture,
detection limit) are 25.20, 24.92, 24.66, and 24.39 mag for B-, V-, R-, and I-band, respectively. When only the 8 high-galactic latitude fields are
included these become 25.33, 25.05, 25.36, and 24.58 mag, in good
agreement with the planned depth of the survey. Visual inspection of
images and catalogs, comparison of statistics derived from the
present data with those obtained by other authors and model
predictions, as well as direct comparison of the results obtained
from independent reductions of the same data, demonstrate the
science-grade quality of the automatically produced final images and
catalogs. These survey products, together with their logs, are
available to the community for science exploitation in conjunction
with their X-ray counterparts. Preliminary results from the
X-ray/optical cross-correlation analysis show that about 61% of the
detected X-ray point sources in deep XMM-Newton exposures have at least one optical counterpart within 2´´ radius down to
25 mag, 50% of which are so faint as to require VLT observations thereby meeting one of the top requirements of the survey, namely to
produce large samples for spectroscopic follow-up with the VLT,
whereas only 15% of the objects have counterparts down to the DSS limiting magnitude.
Key words: catalogs / surveys / stars: general / Galaxy: general / X-rays: general
© ESO, 2006
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