J/A+A/687/A94ivo://CDS.VizieR/J/A+A/687/A94doi:10.26093/cds/vizier.36870094CDSGriggio M.Libralato M.Bellini A.Bedin L.R.Anderson J.Smith L.C.,Minniti D.2024-11-29T20:04:30Z2024-07-02T08:16:00ZCDS support team

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

cds-question@unistra.frastrometryinfrared-photometryproper-motionsWe use near-infrared, ground-based data from the VISTA Variables in the Via Lactea (VVV) survey to indirectly extend the astrometry provided by the Gaia catalog to objects in heavily extinct regions toward the Galactic bulge and plane that are beyond Gaia's reach. We made use of state-of-the-art techniques developed for high-precision astrometry and photometry with the Hubble Space Telescope to process the VVV data. We employed empirical, spatially variable, effective point spread functions and local transformations to mitigate the effects of systematic errors, like residual geometric distortion and image motion, and to improve measurements in crowded fields and for faint stars. We also anchored our astrometry to the absolute reference frame of Gaia Data Release 3. We measure between 20 and 60 times more sources than Gaia in the region surrounding the Galactic center, obtaining a single-exposure precision of about 12 mas and a proper-motion precision of better than 1mas/yr for bright, unsaturated sources. Our astrometry provides an extension of Gaia into the Galactic center.We publicly release the astro-photometric catalogs of the two VVV fields considered in this work, which contain a total of ~3.5 million sources. Our catalogs cover ~3 sq. degrees, about 0.5% of the entire VVV survey area.2024A&A...687A..94Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/687/A94CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/376 : VISTA Variable in the Via Lactea Survey (VVV) DR4.2 (Minniti+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/687/A94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/687/A94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/687/A94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/687/A94https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/687/A94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/687/A94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/687/A94/tileb248 (Astro-photometric catalog for VVV tile b248)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/687/A94/tileb248?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/687/A94/tileb248?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/687/A94/tileb248?GETtext/xml+votable180.050000true272.0010348035-34.72898766770.005555555555555556Cone search capability for table J/A+A/687/A94/tileb333 (Astro-photometric catalog for VVV tile b333)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/687/A94/tileb333?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/687/A94/tileb333?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/687/A94/tileb333?GETtext/xml+votable180.050000true266.100201214-30.23362440150.0055555555555555565/7206 6/28699 28702-28703 28721 28724-28725 28828 28830 28849 288527.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/687/A94?format=asciiInfrareddefaultJ/A+A/687/A94/tileb248Astro-photometric catalog for VVV tile b248recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at Ep=2012.51degpos.eq.raindexedDE_ICRSDeclination (ICRS) at Ep=2012.51degpos.eq.decindexedKsmagVIRCAM Ks Vega-mag magnitudemagphot.mag;em.IR.KfloatJmag? VIRCAM Ks Vega-mag magnitudemagphot.mag;em.IR.JfloatnullablepmRA? Proper-motion along RAmas/yrpos.eq.ra;meta.maindoublenullablee_pmRA? Error on proper-motion along RAmas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper-motion along DECmas/yrpos.eq.dec;meta.maindoublenullablee_pmDE? Error on proper-motion along DECmas/yrstat.error;pos.pm;pos.eq.decdoublenullablenfitRANumber of points used to fit pmRAmeta.numberinttfitRATemporal baseline for pmRA fityrinstr.baselinefloatnfitDENumber of points used to fit pmDECmeta.numberinttfitDETemporal baseline for pmDEC fityrinstr.baselinefloatQFITQuality-of-fit parameter for the Ks magnitudemeta.code.qualfloatOKFlagFlag to select reliable sourcesmeta.codeintJ/A+A/687/A94/tileb333Astro-photometric catalog for VVV tile b333recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight ascension (ICRS) at Ep=2012.29degpos.eq.raindexedDE_ICRSDeclination (ICRS) at Ep=2012.29degpos.eq.decindexedKsmagVIRCAM Ks Vega-mag magnitudemagphot.mag;em.IR.KfloatJmag? VIRCAM Ks Vega-mag magnitudemagphot.mag;em.IR.JfloatnullablenfitRANumber of points used to fit pmRAmeta.numberintpmRA? Proper-motion along RAmas/yrpos.eq.ra;meta.maindoublenullablee_pmRA? Error on proper-motion along RAmas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDE? Proper-motion along DECmas/yrpos.eq.dec;meta.maindoublenullablee_pmDE? Error on proper-motion along DECmas/yrstat.error;pos.pm;pos.eq.decdoublenullabletfitRATemporal baseline for pmRA fityrinstr.baselinefloatnfitDENumber of points used to fit pmDECmeta.numberinttfitDETemporal baseline for pmDEC fityrinstr.baselinefloatQFITQuality-of-fit parameter for the Ks magnitudemeta.code.qualfloatOKFlag[0/1] Flag to select reliable sources (G1)meta.codeint