J/A+AS/117/335ivo://CDS.VizieR/J/A+AS/117/335CDSAssafin M.Andrei A.H.Puliaev S.P.Jilinski E.G.Vieira Martins R.,Vieira G.G.de Oliveira W.M.1997-12-09T18:08:44Z1997-12-09T19:08:40ZCDS support team

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

cds-question@unistra.frradio-astronomyastrometryIn order to contribute to the alignment of the radio and optical reference frames, 50 stars with confirmed radio emission and published radio positions were observed by astrographical means. Additionally, two confirmed radio-stars of fainter magnitude were observed using a CCD direct camera with a long focus, large aperture telescope. The reductions are made relative to four catalogues: the Carlsberg Meridian Catalogue #4, the International Reference Stars Catalogue, the Positions and Proper Motion Catalogue and the Astrographical Catalogue of Reference Stars. The best results were obtained with the CAMC catalogue. The plate error of a radio star position is 0.07" for both right ascension and declination, rising to 0.10"-0.20" for bright stars. Ten of the program stars are not in the HIPPARCOS Input Catalogue and 12 do not belong to any of the major reference catalogues used. As soon as the HIPPARCOS results become available, its reference stars already measured in the plates will enable us to get positions for those 10 radio stars in the HIPPARCOS system.1996A&AS..117..335Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/117/335CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/117/335https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/117/335http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/117/335https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/117/335https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/117/335http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/117/335GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/117/335/table2 (Positions obtained astrographically and their comparison against major optical catalogues)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/117/335/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/117/335/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/117/335/table2?GETtext/xml+votable180.050000true47.0422291740.955741670.005555555555555556Cone search capability for table J/A+AS/117/335/table4 (Positions obtained by mosaicing of CCD images and their comparison against major optical catalogues)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/117/335/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/117/335/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/117/335/table4?GETtext/xml+votable180.050000true61.37862521.853033330.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/117/335?format=asciiRadiodefaultJ/A+AS/117/335/table2Positions obtained astrographically and their comparison against major optical cataloguesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the radio starmeta.id;meta.maincharVmagVisual magnitudemagphot.mag;em.opt.VfloatSpSpectral typesrc.spTypecharEp-1900Epoch of the astrographic observation (1900+)yrtime.epochfloatRAJ2000Right ascension (J2000), at epoch (1)pos.eq.ra;meta.maine_RAsrms uncertainty on right ascensionsstat.errorfloatDEJ2000Declination signpos.eq.dec;meta.mainnullablee_DEsrms uncertainty on declinationarcsecstat.errorfloatDRA? Difference in RA with CAMC#4arcsecpos.eq.ra;arith.difffloatDDE? Difference in DE with CAMC#4arcsecpos.eq.dec;arith.difffloatDRA2Difference in RA with ACRSarcsecpos.eq.ra;arith.difffloatDDE2Difference in DE with ACRSarcsecpos.eq.dec;arith.difffloatDRA3Difference in RA with PPMarcsecpos.eq.ra;arith.difffloatDDE3Difference in DE with PPMarcsecpos.eq.dec;arith.difffloatDRA4? Differences in RA with the PPM High Precision Subsetarcsecpos.eq.ra;arith.difffloatDDE4? Difference in DE with the PPM High Precision Subsetarcsecpos.angDistancefloatDRA5Difference in RA with IRSarcsecpos.eq.ra;arith.difffloatDDE5Difference in DE with IRSarcsecpos.eq.dec;arith.difffloatJ/A+AS/117/335/table4Positions obtained by mosaicing of CCD images and their comparison against major optical cataloguesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the radio starmeta.id;meta.maincharVmagVisual magnitudemagphot.mag;em.opt.VfloatSpSpectral typesrc.spTypecharEp-1900Epoch of the astrographic observation (1900+)yrtime.epochfloatRAJ2000Right ascension (J2000), at epoch (1)pos.eq.ra;meta.maine_RAsrms uncertainty on right ascensionsstat.errorfloatDEJ2000Declination signpos.eq.dec;meta.mainnullablee_DEsrms uncertainty on declinationarcsecstat.errorfloatDRA? Difference in RA with CAMC#4arcsecpos.eq.ra;arith.difffloatDDE? Difference in DE with CAMC#4arcsecpos.eq.dec;arith.difffloatDRA2Difference in RA with ACRSarcsecpos.eq.ra;arith.difffloatDDE2Difference in DE with ACRSarcsecpos.eq.dec;arith.difffloatDRA3Difference in RA with PPMarcsecpos.eq.ra;arith.difffloatDDE3Difference in DE with PPMarcsecpos.eq.dec;arith.difffloatDRA4? Differences in RA with the PPM High Precision Subsetarcsecpos.eq.ra;arith.difffloatDDE4? Difference in DE with the PPM High Precision Subsetarcsecpos.angDistancefloatDRA5Difference in RA with IRSarcsecpos.eq.ra;arith.difffloatDDE5Difference in DE with IRSarcsecpos.eq.dec;arith.difffloat