Extension of ICRF for selected areas down to V=16 J/A+A/409/361 ivo://CDS.VizieR/J/A+A/409/361 doi:10.26093/cds/vizier.34090361 CDS Camargo J.I.B. Ducourant C. Teixeira R. Le Campion J.-F. Rapaport M.,Benevides-Soares P. 2003-11-20T21:53:51Z 2003-11-20T22:47:44Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr astrometry proper-motions photometry A catalogue of accurate positions and proper motions for 678,828 objects is provided. Objects are within areas of special astronomical interest, containing extragalactic radio sources, mostly from ICRF (see Cat. <I/251>), and pre-main-sequence (PMS) stars in Southern star-forming regions (Chamaeleon, Lupus and Upper Scorpius-Ophiuchus). This work represents a major upgrade of that presented in Camargo et al., 2001, Cat. <J/A+A/375/308>, aiming at the extension of the ICRF at optical wavelengths in regions of special astronomical interest, using observations from the Bordeaux and Valinhos meridian circles. Along with the new fields, the main differences, when compared to the first release, are: a much larger sky coverage, the replacement of the AC2000 by its upgraded version AC2000.2 (<I/275>) as one of the first epoch astrometrical sources, inclusion of Tycho-2 (<I/259>) and 2MASS (2nd Incremental Data Release, See Cat <II/246>) photometry when available, and the correction for a magnitude equation on the Valinhos right ascension system as well. Positional external precisions, on both coordinates, range from 50-60mas (V<=13.5) to 70-140mas (13.5<V<=16.0). For the proper motions, precisions range from 3mas/year to about 15mas/year, depending on magnitude and declination. The strips scanned by the meridian circles are described in Table 1 2003A&A...409..361C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/409/361 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to J/A+A/375/308 : Extension of ICRF for selected areas for V<=15 (Camargo+ 2001) I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997) I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/275 : The AC 2000.2 Catalogue (Urban+ 2001) I/252 : The USNO-A2.0 Catalogue (Monet+ 1998) I/146 : Positions and Proper Motions - North (Roeser+, 1988) I/193 : Positions and Proper Motions - South (Bastian+ 1993) I/265 : Second Cape Photographic Catalogue (CPC2) (Zacharias+, 1999) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) http://ad.usno.navy.mil/tac/ : Twin Astrographic Catalog Version 2 Home Page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/409/361 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/409/361 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/409/361 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/409/361 https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/409/361 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/409/361 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/A+A/409/361/table1 (Approximate central coordinates of the meridian strips) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/409/361/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/409/361/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/409/361/table1? GET text/xml+votable 180.0 50000 true 0.020833 16.266944 0.005555555555555556 Cone search capability for table J/A+A/409/361/catalog (Bordeaux and Valinhos meridian circle catalogue) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/409/361/catalog? https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/409/361/catalog? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/409/361/catalog? 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Should Not be used for identification. meta.record int Zone [VB] V: Valinhos zones, B: Bordeaux zones meta.ref char TARG ICRF name or other identifier of the target object meta.id.assoc char Nobj Total number of selected objects in the region: 3 or more observations in each coordinate with {sigma}RA*cos(DE) and {sigma}DE<=250mas meta.number int DaCd Mean, in units of milliarcseconds in RA*cos(DE), for the positional precision in RA of the objects computed in the column (Nobj) mas stat.error int Dd Mean, in units of milliarcseconds, for the positional precision in DE for the objects computed in the column (Nobj) mas stat.error int RA2000 Approximate strip central right ascension (2000) (5) pos.eq.ra;meta.main DE2000 Approximate strip central declination (2000) (5) pos.eq.dec;meta.main Vmag ? V magnitude as given in the ICRF (Cat. <I/251>) mag phot.mag;em.opt.V float nullable Nobs ? Number of observations of the target region meta.number int nullable
J/A+A/409/361/catalog Bordeaux and Valinhos meridian circle catalogue recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int RA(ICRS) Right Ascension (hours) ICRS, epoch EpRA-1900 pos.eq.ra;meta.main indexed DE(ICRS) Declination (degrees) ICRS, epoch EpDE-1900 pos.eq.dec;meta.main indexed pmRA Proper motion mu_alpha*cos(dec) ICRS mas/yr pos.pm;pos.eq.ra int pmDE Proper motion mu_delta ICRS mas/yr pos.pm;pos.eq.dec int VmagC V magnitude as obtained from BMC (Bordeaux) or VMC (Valinhos) mag phot.mag;em.opt.V float BTmag ? B magnitude as obtained from the Tycho-2 mag phot.mag;em.opt.B float nullable VTmag ? V magnitude as obtained from the Tycho-2 mag phot.mag;em.opt.V float nullable Jmag ? J magnitude from the 2MASS (1) mag phot.mag;em.IR.J float nullable Hmag ? H magnitude from the 2MASS (1) mag phot.mag;em.IR.H float nullable Kmag ? K magnitude from the 2MASS (1) mag phot.mag;em.IR.K float nullable EpRA-1900 RA epoch minus 1900 yr time.epoch float EpDE-1900 DE epoch minus 1900 yr time.epoch float DT Largest time interval for proper motion determination yr time.interval float e_RAs Standard error in RA*cos(dec) for EpRA mas stat.error int e_DEs Standard error in DE for EpDE mas stat.error int e_pmRA Standard error in pmRA mas/yr stat.error int e_pmDE Standard error in pmDE mas/yr stat.error int Nobs Number of meridian observations meta.number int HIP ? HIPPARCOS (Cat. <I/239>) Catalogue number meta.id int nullable TYC ? Tycho-2 number (see Note (1) in <I/259>) meta.id char f_TYC [*] Presence in Tycho-1 catalogue (2) meta.code.error char AC2000.2 ? AC2000.2 (Cat. <I/275>) number meta.id int nullable C1 [BV] Current epoch catalogue: [B]ordeaux or [V]alinhos (3) meta.ref char C2 [A] A: use of AC2000.2 data, Cat. <I/275> meta.ref char C3 [U] U: use of USNO-A2.0 data, Cat. <I/252> meta.ref char C4 [P] P: use of PPM data, PPM North <I/146>, PPN South <I/1993> meta.ref char C5 [T] T: use of TAC-2 data, Zacharias & Zacharias, 1999AJ....118.2503Z meta.ref char C6 [C] C: use of CPC-2 data, Cat. <I/265> meta.ref char C7 [E] ESO plate measurements (4) meta.ref char