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|Title:||OmegaWINGS: OmegaCAM-VST observations of WINGS galaxy clusters||Authors:||GULLIEUSZIK, MARCO
POGGIANTI, Bianca Maria
Couch, W. J.
|Issue Date:||2015||Journal:||ASTRONOMY & ASTROPHYSICS||Number:||581||First Page:||A41||Abstract:||Context. Wide-field observations targeting galaxy clusters at low redshift are complementary to field surveys and provide the local benchmark for detailed studies of the most massive haloes in the local Universe. The Wide-field Nearby Galaxy-cluster Survey (WINGS) is a wide-field multi-wavelength survey of X-ray selected clusters at z = 0.04-0.07. The original 34' × 34' WINGS field of view has now been extended to cover a 1 deg<SUP>2</SUP> field with both photometry and spectroscopy. <BR /> Aims: We present the Johnson B- and V-band OmegaCAM at the VST observations of 46 WINGS clusters together with the data reduction, data quality, and Sextractor photometric catalogues. <BR /> Methods: The data reduction was carried out with a modified version of the ESO-MVM (also known as ALAMBIC) reduction package, adding a cross-talk correction, the gain harmonisation, and a control procedure for problematic CCDs. The stray-light component was corrected for by employing our own observations of populated stellar fields. <BR /> Results: With a median seeing of 1″ in both bands, our 25-min exposures in each band typically reach the 50% completeness level at V = 23.1 mag. The quality of the astrometric and photometric accuracy has been verified by comparison with the 2MASS and SDSS astrometry, and SDSS and previous WINGS imaging. Star-to-galaxy separation and sky-subtraction procedure were tested comparing them with previous WINGS data. <BR /> Conclusions: The Sextractor photometric catalogues are publicly available at the CDS and will be included in the next release of the WINGS database on the Virtual Observatory together with the OmegaCAM reduced images. These data form the basis for a large ongoing spectroscopic campaign with AAOmega at the AAT and are being employed for a variety of studies. <P />Based on observations made with VST at ESO Paranal Observatory under program ID 88.A-4005, 089.A-0023, 090.A-0074, 091.A-0059, and 093.A-0041.The photometric catalogue is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://22.214.171.124) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/581/A41">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/581/A41||Acknowledgments:||We would like to warmly thank Hervé Bouy and Benoit Vandame for sharing their code and for the useful discussion. We acknowledge financial support from the PRIN-INAF 2010 and 2014. B.V. was supported by the World Premier International Research Center Initiative (WPI), MEXT, Japan and the Kakenhi Grant-in-Aid for Young Scientists (B)(26870140) from the Japan Society for the Promotion of Science (JSPS). This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University.||URI:||http://hdl.handle.net/20.500.12386/26008||URL:||https://www.aanda.org/articles/aa/abs/2015/09/aa26061-15/aa26061-15.html||ISSN:||0004-6361||DOI:||10.1051/0004-6361/201526061||Bibcode ADS:||2015A&A...581A..41G||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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