I/315ivo://CDS.VizieR/I/315CDSZacharias N.Finch C.Girard T.Hambly N.Wycoff G.,Zacharias M.I.Castillo D.Corbin T.DiVittorio M.Dutta S.,Gaume R.Gauss S.Germain M.Hall D.Hartkopf W.Hsu D.,Holdenried E.Makarov V.Martines M.Mason B.Monet D.,Rafferty T.Rhodes A.Siemers T.Smith D.Tilleman T.,Urban S.Wieder G.Winter L.Young A.,2025-08-18T07:26:01Z2010-02-09T09:46:38ZCDS support team

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

cds-question@unistra.frsurveysastrometryproper-motionsUCAC3 is a compiled, all-sky star catalog covering mainly the 8 to 16 magnitude range in a single bandpass between V and R. Positional errors are about 15 to 20 mas for stars in the 10 to 14 mag range. It is supplemented by proper motions and SuperCosmos and 2MASS photometric data, as well as various flags. The proper motions of bright stars are based on about 140 catalogs, including Hipparcos and Tycho, as well as all catalogs used for the Tycho-2 proper motion construction. Proper motions of faint stars are based on a re-reduction of early epoch SPM data (-90 to -10 deg Dec) plus Schmidt plate data from the SuperCosmos project (down weighted due to systematic errors of order 100 mas). The proper motions of faint stars (R >= 13.5) therefore should be used with caution. The unpublished plate measure data from the AGK2, the Hamburg Zone Astrograph, the USNO Black Birch Astrograph, and the Lick Astrograph have considerably contributed to improve proper motions for stars mainly in the 10 to 14 mag range (down to the UCAC3 limit for Lick data); however, these data do not cover all sky. UCAC3 features a number of major differences with respect to UCAC2: - complete sky coverage - re-reduction of the pixel data with better modeling - double stars are resolved to the limit of the data - significantly improved photometry from CCD data - slightly deeper limiting magnitude with larger number of stars/area - reduced systematic errors of CCD observations - the addition of several new catalogs for improved proper motions - photometry in the B, R, and I bands from the SuperCosmos project - minor planet observations have been sorted out - identification of more high proper motion stars - match with 2MASS extended sources and LEDA galaxies Additional details will be published in the upcoming release paper (Zacharias et al. 2009) and in several technical papers describing details of the reduction procedures and results. For the latest updates see http://www.usno.navy.mil/usno/astrometry . Requests for the data DVD should be sent to ucac3@usno.navy.mil; technical questions can be addressed to nz@usno.navy.mil .2010AJ....139.2184Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/315CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/ucac : UCAC home pageI/289 : UCAC2 Catalogue (Zacharias+ 2004)I/247 : The AC2000 Catalogue (Urban+ 1997)I/259 : The Tycho-2 Catalogue (Hog+ 2000)I/277 : SPM Catalog 2.0 (Platais+ 1998)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)VII/242 : LEDA galaxies with DENIS measurements catalog (Paturel+, 2005)VII/248 : Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/315https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/315http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/315https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/315https://vizier.iucaa.in/viz-bin/votable?-source=I/315http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/315GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/315/out (UCAC3 output)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/315/out?https://vizier.iucaa.in/viz-bin/conesearch/I/315/out?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/315/out?GETtext/xml+votable180.050000true82.83793341.69657140.0055555555555555560/0-11 6/8.650015785639275e-20 3.4272990383579255e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/I/315?format=asciidefaultI/315/outUCAC3 output3UCUCAC3 designation (1)meta.id;meta.maincharprimarypmRA? Proper motion in RA(*cos(Dec))mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Mean error on pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in Decmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Mean error on pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableJmag? J magnitude (1.2um) from 2MASSmagphot.mag;em.IR.JfloatnullableindexedHmag? H magnitude (1.6um) from 2MASSmagphot.mag;em.IR.HfloatnullableKmag? K magnitude (2.2um) from 2MASSmagphot.mag;em.IR.KfloatnullableindexedRAJ2000Right ascension (degrees), FK5, Ep=J2000degpos.eq.ra;meta.maine_RAJ2000Minimal mean error on RAdeg (at EpRA)masstat.error;pos.eq.raintDEJ2000Declination (degrees), FK5, Ep=J2000degpos.eq.dec;meta.maine_DEJ2000Minimal mean error on DEdeg (at EpDE)masstat.error;pos.eq.decintePosError of position at Epoch=J2000 (9)masstat.error;posintEpRACentral epoch for mean RAyrtime.epochfloatEpDECentral epoch for mean Declinationyrtime.epochfloatf.mag? UCAC fit model magnitude (579-642nm) (2)magphot.mag;em.optfloatnullablea.mag? UCAC aperture magnitude (579-642nm) (2)magphot.mag;em.optfloatnullablee_a.mag? Mean error on f.mag and a.mag (3)magstat.errorfloatnullableot[-2,3] UCAC object classification flag (4)src.class.starGalaxyintdb[0,7] double star flag (5)meta.codeintNaNumber of UCAC observations for the starmeta.numberintNuNumber of used UCAC observations (6)meta.numberintCaNumber of catalog positionsmeta.numberintCuNumber of catalog positions used for pm'smeta.numberintMPOS[1,140051297] mean position (MPOS) number (17)meta.idlong2Mkey? 2MASS (Cat. II/246) Unique source identifiermeta.id.crossnullablee_Jmag? Mean error (rounded to 0.01mag)magstat.error;phot.magfloatnullableq_Jmag[0,58]? J-band quality-confusion flag (7)meta.code.qualintnullablee_Hmag? Mean error (rounded to 0.01mag)magstat.error;phot.magfloatnullableq_Hmag[0,58]? H-band quality-confusion flag (7)meta.code.qualintnullablee_Kmag? Mean error (rounded to 0.01mag)magstat.error;phot.magfloatnullableq_Kmag[0,58]? K-band quality-confusion flag (7)meta.code.qualintnullablesc[0,14]? Supercosmos mean object + 'blend' class (10)src.class.starGalaxyintnullableBmag? B magnitude from Supercosmosmagphot.mag;em.opt.Bfloatnullableq_Bmag[-1,3]? B-band quality-confusion flag (11)meta.code.qualintnullableR2mag? R magnitude from Supercosmos 2nd epochmagphot.mag;em.opt.Rfloatnullableq_R2mag[-1,3]? R-band quality-confusion flag (11)meta.code.qualintnullableImag? I magnitude from Supercosmosmagphot.mag;em.opt.Ifloatnullableq_Imag[-1,3]? I-band quality-confusion flag (11)meta.code.qualintnullablecatflgmatching flags for 10 catalogues (12)meta.codeg[0,3]? g-flag from SPM (13)meta.codeintnullablec[0,7]? c-flag from SPM (14)meta.codeintnullableLEDALEDA I-band galaxy match (15)log(6arcsec)phys.angSizeint2MX2MASX K-band match (16)arcsecphys.angSize;srcint