J/AJ/142/105ivo://CDS.VizieR/J/AJ/142/105doi:10.26093/cds/vizier.51420105CDSPetrov L.2012-05-20T10:11:22Z2012-03-15T14:51:22ZCDS support team

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

cds-question@unistra.frvery-long-baseline-interferometryradio-sourcesIt is expected that the European Space Agency mission Gaia will make possible to determine coordinates in the optical domain of more than 500,000 quasars. In 2006, a radio astrometry project was launched with the overall goal to make comparison of coordinate systems derived from future space-born astrometry instruments with the coordinate system constructed from analysis of the global very long baseline interferometry (VLBI) more robust. Investigation of their rotation, zonal errors, and the non-alignment of the radio and optical positions caused by both radio and optical structures are important for validation of both techniques. In order to support these studies, the densification of the list of compact extragalactic objects that are bright in both radio and optical ranges is desirable. A set of 105 objects from the list of 398 compact extragalactic radio sources with declinations >-10{deg} was observed with the VLBA+EVN with the primary goal of producing their images with milliarcsecond resolution. These sources are brighter than 18 magnitude at V band, and they were previously detected at the European VLBI network. In this paper coordinates of observed sources have been derived with milliarcsecond accuracies from analysis of these VLBI observations following the method of absolute astrometry. The catalog of positions of 105 target sources is presented. The accuracies of sources coordinates are in the range of 0.3 to 7mas, with the median 1.1mas.2011AJ....142..105Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/142/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/251 : VLBI International Celestial Reference Frame ICRF (Ma+ 1997)J/A+A/437/1135 : Near-IR astrometry of Southern ICRF quasars (Camargo+, 2005)J/A+A/493/317 : Radio source selection for the ICRF (Lambert+, 2009)J/A+A/520/A113 : 398 extragal. radio sources VLBI detection (Bourda+ 2010)J/AJ/125/2728 : Optical positions of ICRF sources (Assafin+, 2003)J/AJ/127/3587 : VLBI ICRF. II (Fey+, 2004)J/AJ/127/3609 : VLBI observations of southern ICRF sources (Ojha+, 2004)J/AJ/130/2529 : Southern ICRF sources 8.4GHz VLBI observations (Ojha+, 2005)J/MNRAS/416/1097 : The EVN Galactic Plane Survey - EGaPS (Petrov, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/142/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/142/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/142/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/142/105https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/142/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/142/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/142/105/table2 (OBRS1 catalog of source positions and correlated flux densities at X and S bands)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/142/105/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/142/105/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/142/105/table2?GETtext/xml+votable180.050000true1.59606702512.598082869440.0055555555555555566/696 2549 4733 4923 5035 5065 5072 5268 5303 5312 5336 5352 5637 5648 5957 6015 6067 6234 6244 6436 6499 6519 6628 6764 7220 7656 7902 8525 8578 8673 8918 9402 9490 9501 9637 9664 9796 10148 10198 10202 10280 10337 10348 10395 10800 10843 10938 10978 11045 11209 11557 11692 11703 11734 11765 11991 11993 12057 12164 12722 13071 13092 13175 13603 13664 13705 15100 15271 15306 16184 16323 17601 17843 17990 18027 19655 19803 20019 20141 20184 22014 22789 23011 23369 25542 26072 26198 26798 26833 27472 27524 27717 27787 28248 28369 28450 28575 32159 32230 32261 32410 32461 32621 327151.5239959695752804e-24 5.6984200832293834e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/142/105?format=asciiRadiodefaultJ/AJ/142/105/table2OBRS1 catalog of source positions and correlated flux densities at X and S bandsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIVSIVS name (International VLBI Service for geodesy and Astrometry; based on B1950 position)meta.id;meta.maincharIAUIAU name (based on J2000 position)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAJ2000Uncertainty in RAs; without cos{delta} factormasstat.error;pos.eq.rafloatDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEJ2000Uncertainty in DEsmasstat.error;pos.eq.decfloatCorr[-1,+1] Correlation between RA and Decstat.correlationfloatNobsNumber of observations usedmeta.numberintF(S)sS-band (2.3GHz) "short" flux density (1)Jyphot.flux.density;em.radio.1500-3000MHzfloatF(S)lS-band (2.3GHz) "long" flux density (1)Jyphot.flux.density;em.radio.1500-3000MHzfloatF(X)sX-band (8.6GHz) "short" flux density (1)Jyphot.flux.density;em.radio.6-12GHzfloatF(X)lX-band (8.6GHz) "long" flux density (1)Jyphot.flux.density;em.radio.6-12GHzfloatFlag[VX ] Cross-reference flag (2)meta.code.errorchar