I/297ivo://CDS.VizieR/I/297CDSZacharias N.Monet D.G.Levine S.E.Urban S.E.Gaume R.Wycoff G.L.2024-09-26T09:49:04Z2009-02-28T13:47:50ZCDS support team

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

cds-question@unistra.frastrometryproper-motionssurveysvisible-astronomyphotographic-photometryinfrared-photometryThe Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry. For each unique star the "best" astrometric and photometric data are chosen from the source catalogs and merged into a single dataset. A sequence of priorities is followed and NOMAD contains flags to identify the source catalogs and gives cross-reference identifications. This first release of NOMAD is not a compiled catalog; that is, if a star is identified in more than 1 of the above mentioned catalogs, only 1 catalog entry is chosen. Thus the local and global systematic errors of the various source catalogs will be present in this version of NOMAD. All source catalogs astrometric data are on the International Celestial Reference System within the limitations of the source catalogs. For more information, see https://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/nomad2004AAS...205.4815Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/297CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttps://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/nomad : NOMAD<I/239> : The Hipparcos and Tycho Catalogues (ESA 1997)<I/259> : The Tycho-2 Catalogue (Hog+ 2000)<I/284> : The USNO-B1.0 Catalog (Monet+ 2003)<I/289> : UCAC2 Catalogue (Zacharias+ 2004)<II/246> : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/297https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/297http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/297https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/297https://vizier.iucaa.in/viz-bin/votable?-source=I/297http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/297GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/297/out (Example of the an output of NOMAD-1)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/297/out?https://vizier.iucaa.in/viz-bin/conesearch/I/297/out?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/297/out?GETtext/xml+votable180.050000true44.99596110.00570.0055555555555555560/0-11 6/1.1166583743361574e-19 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/I/297?format=asciiOpticalInfrareddefaultI/297/outExample of the an output of NOMAD-1Rmag?Red magnitudemagphot.mag;em.opt.Rfloatnullabler_Rmag[BCMYTHe] Origin of Rmag (3)meta.ref;pos.framecharJmag?Infrared J magnitude (from 2MASS)magphot.mag;em.IR.JfloatnullableHmag?Infrared H magnitude (from 2MASS)magphot.mag;em.IR.HfloatnullableKmag?Infrared K magnitude (from 2MASS)magphot.mag;em.IR.KfloatnullableXflagsHexadecimal flags (4)meta.codecharR? [R*] Recommended (R) or Problematic (*) (4)meta.notecharRAJ2000Right ascension in J2000, Ep=J2000degpos.eq.ra;meta.mainDEJ2000Declination in J2000, Ep=J2000degpos.eq.dec;meta.mainUSNO-B1Identifier in USNO-B1 (Cat. I/284) (1)meta.idcharNOMAD1NOMAD-identifier (1)meta.id;meta.maincharprimaryUCAC2? Number in UCAC2 (Cat. I/289)meta.idintnullableTycho-2? Identification in Tycho-2 or Hipparcos (2)meta.idcharf_Tycho-2? [*] when distance NOMAD1/Tycho-2 > 1arcsecmeta.codeintnullableYM[YM.] Existence in YB6 or 2MASS (Cat. II/246)meta.notecharr[BCMYTH] Source of position (3)meta.ref;pos.framechare_RAJ2000Mean error on RAdeg (at epRA)masstat.error;pos.eq.rainte_DEJ2000Mean error on DEdeg (at epDE)masstat.error;pos.eq.decintpmRAProper motion in RA (*cos(Dec))mas/yrpos.pm;pos.eq.rafloate_pmRAMean error on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in Declinationmas/yrmeta.refdoublee_pmDEMean error on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatBmag?Blue magnitudemagphot.mag;em.opt.Bfloatnullabler_Bmag[BCMYTHo] Origin of Bmag (3)meta.ref;pos.framecharVmag?Visual magnitudemagphot.mag;em.opt.Vfloatnullabler_Vmag[BCMYTH] Origin of Vmag (3)meta.ref;pos.framechar