J/A+A/634/A50ivo://CDS.VizieR/J/A+A/634/A50doi:10.26093/cds/vizier.36340050CDSPoulain M.Paolillo M.De Cicco D.Brandt W.N.Bauer F.E.Falocco S.,Vagnetti F.Grado A.Ragosta F.Botticella M.T.Cappellaro E.,Pignata G.Vaccari M.Schipani P.Covone G.Longo G.Napolitano N.R.2021-10-18T12:10:21Z2020-02-05T06:34:22ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fractive-galactic-nucleiapparent-magnituderedshiftedVariability has proven to be a powerful tool to detect active galactic nuclei (AGN) in multi-epoch surveys. The new-generation facilities expected to become operational in the next few years will mark a new era in time-domain astronomy and their wide-field multi-epoch campaigns will favor extensive variability studies. We present our analysis of AGN variability in the second half of the VST survey of the Wide Chandra Deep Field South (W-CDF-S), performed in the r band and covering a 2 sq. deg. area. The analysis complements a previous work, in which the first half of the area was investigated. We provide a reliable catalog of variable AGN candidates, which will be critical targets in future variability studies. We selected a sample of optically variable sources , and made use of infrared data from the Spitzer mission to validate their nature by means of color-based diagnostics. We obtain a sample of 782 AGN candidates among which 12 are classified as supernovae, 54 as stars, and 232 as AGN. We estimate a contamination <~ 20% and a completeness ~38% with respect to mid-infrared selected samples.2020A&A...634A..50Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/634/A50CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/579/A115 : SUDARE-VOICE variability-selection of AGN (Falocco+, 2015)J/A+A/584/A62 : SUDARE VST-OmegaCAM search supernova rates (Cappellaro+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/634/A50https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/634/A50http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/634/A50https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/634/A50https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/634/A50http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/634/A50GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/634/A50/table3 (List of the 782 optically variable sources in the sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/634/A50/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/634/A50/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/634/A50/table3?GETtext/xml+votable180.050000true52.8213-29.05720.0055555555555555565/8983 6/35931 35953 35956https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/634/A50?format=asciidefaultJ/A+A/634/A50/table3List of the 782 optically variable sources in the samplez? Redshift (2)src.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField (CDF-S3 or CDF-S4)meta.id;obs.fieldcharID[1/782] Sequential identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainrmagavgAverage VST r magnitude (AB)magphot.mag;em.opt.Rfloatltcrmsr.m.s. of the light curvemagstat.errorfloatPercentilePercentile (1)meta.codeintS/GSExtractor stellarity indexsrc.class.starGalaxyfloatClassSource classification (3)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullable