I/317ivo://CDS.VizieR/I/317CDSRoeeser S.Demleitner M.Schilbach E.2024-10-14T07:34:51Z2010-07-11T09:10:47ZCDS support team

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

cds-question@unistra.frsurveysastrometryproper-motionsvisible-astronomyphotographic-photometryinfrared-photometryUSNO-B1.0 (Cat. I/284) and 2MASS (Cat. II/246) are the most widely used full-sky surveys. However, 2MASS has no proper motions at all, and USNO-B1.0 published only relative, not absolute (i.e. on ICRS) proper motions. We performed a new determination of mean positions and proper motions on the ICRS system by combining USNO-B1.0 and 2MASS astrometry. This catalog is called PPMXL, and it aims to be complete from the brightest stars down to about V=20 full-sky. PPMXL contains about 900 million objects, some 410 million with 2MASS photometry, and is the largest collection of ICRS proper motions at present. As representative for the ICRS we chose PPMX. The recently released UCAC3 (Cat. I/315) could not be used because we found plate-dependent distortions in its proper motion system north of -20{deg} declination. UCAC3 served as an intermediate system for {demta}<-20{deg}. The resulting typical individual mean errors of the proper motions range from 4mas/yr to more than 10mas/yr depending on observational history. The mean errors of positions at epoch 2000.0 are 80 to 120 mas, if 2MASS astrometry could be used, 150 to 300 mas else. We also give correction tables to convert USNO-B1.0 observations of e.g. minor planets to the ICRS system.2010AJ....139.2440Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/317CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/312 : PPMX Catalog of positions and proper motions (Roeser+ 2008)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)http://vo.uni-hd.de/ppmxl : VO-access to the cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/317https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/317http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/317https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/317https://vizier.iucaa.in/viz-bin/votable?-source=I/317http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/317GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/317/sample (Example of formatted output)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/317/sample?https://vizier.iucaa.in/viz-bin/conesearch/I/317/sample?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/317/sample?GETtext/xml+votable180.050000true44.9960560.005610.005555555555555556Hips catalogue for table I/317/samplehttps://hipscat.cds.unistra.fr/HiPSCatService/I/317/sample0/0-11 6/8.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/I/317?format=asciiOpticalInfrareddefaultI/317/sampleExample of formatted outputepDEMean Epoch (Dec)yrtime.epochfloatSmags[0-8 -] Surveys used for USNO-B magnitudes (2)meta.idcharRAJ2000Right Ascension J2000.0, epoch 2000.0degpos.eq.ra;meta.mainDEJ2000Declination J2000.0, epoch 2000.0degpos.eq.dec;meta.mainpmRAProper Motion in RA*cos(DEdeg)mas/yrpos.pm;pos.eq.rafloatpmDEProper Motion in Decmas/yrpos.pm;pos.eq.decfloatb1mag? B mag from USNO-B, first epoch (1)magphot.mag;em.opt.Bfloatnullableb2mag? B mag from USNO-B, second epoch (1)magphot.mag;em.opt.Bfloatnullablee_RAJ2000Mean error in RA*cos(DEdeg) at mean epoch (6)masstat.error;pos.eq.rainte_DEJ2000Mean error in Dec at mean epoch (6)masstat.error;pos.eq.decinte_pmRAMean error in pmRA*cos(DEdeg)mas/yrstat.error;pos.pm;pos.eq.rafloate_pmDEMean error in pmDecmas/yrstat.error;pos.pm;pos.eq.decfloatJmag? J magnitude from 2MASS (Cat. II/246)magphot.mag;em.IR.Jfloatnullableindexede_Jmag? J total magnitude uncertaintymagstat.error;phot.magfloatnullableHmag? H magnitude from 2MASS (Cat. II/246)magphot.mag;em.IR.Hfloatnullableindexede_Hmag? H total magnitude uncertaintymagstat.error;phot.magfloatnullableKmag? Ks magnitude from 2MASS (Cat. II/246)magphot.mag;em.IR.Kfloatnullableindexede_Kmag? Ks total magnitude uncertaintymagstat.error;phot.magfloatnullable2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharNOMADDisplay the NOMAD data (Zacharias et al. 2005, Cat. I/297)meta.ref.urlcharPPMXLIdentifier (5)meta.id;meta.mainprimaryr1mag? R mag from USNO-B, first epoch (1)magphot.mag;em.opt.RfloatnullableepRAMean Epoch (RA)yrtime.epochfloatNo? Number of observations used (4)meta.numberintnullableflFlags (3)meta.noteintr2mag? R mag from USNO-B, second epoch (1)magphot.mag;em.opt.Rfloatnullableimag? I mag from USNO-B (1)magphot.mag;em.opt.Ifloatnullable