J/AJ/136/580ivo://CDS.VizieR/J/AJ/136/580doi:10.26093/cds/vizier.51360580CDSPetrov L.Kovalev Y.Y.Fomalont E.B.Gordon D.2013-07-14T12:16:42Z2011-03-31T13:46:00ZCDS support team

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

cds-question@unistra.frsurveysradio-sourcesThis paper presents the sixth part of the Very Long Baseline Array (VLBA) Calibrator Survey. It contains the positions and maps of 264 sources of which 169 were not previously observed with very long baseline interferometry. This survey, based on two 24h VLBA observing sessions, was focused on (1) improving positions of 95 sources from previous VLBA Calibrator Surveys that were observed either with very large a priori position errors or were observed not long enough to get reliable positions and (2) observing remaining new flat-spectrum sources with predicted correlated flux density in the range 100-200mJy that were not observed in previous surveys. Source positions were derived from astrometric analysis of group delays determined at the 2.3 and 8.6GHz frequency bands using the Calc/Solve software package. The VCS6 catalog of source positions, plots of correlated flux density versus projected baseline length, contour plots and fits files of naturally weighted CLEAN images, as well as calibrated visibility function files, are available on the Web at http://vlbi.gsfc.nasa.gov/vcs6.2008AJ....136..580Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/136/580CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)J/AJ/126/2562 : Second VLBA calibrator survey: VCS2 (Fomalont+, 2003)J/AJ/129/1163 : Third VLBA calibrator survey: VCS3 (Petrov+, 2005)J/AJ/131/1872 : Fourth VLBA calibrator survey: VCS4 (Petrov+, 2006)J/AJ/133/1236 : Fifth VLBA calibrator survey: VCS5 (Kovalev+, 2007)J/AJ/136/580 : Sixth VLBA calibrator survey: VCS6 (Petrov+, 2008)http://vlbi.gsfc.nasa.gov/vcs6 : VCS6 Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/136/580https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/136/580http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/136/580https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/136/580https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/136/580http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/136/580GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/136/580/table4 (The VCS6 catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/136/580/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/136/580/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/136/580/table4?GETtext/xml+votable180.050000true0.81645587917-19.697333861110.005555555555555556Cone search capability for table J/AJ/136/580/table5 (Sources not detected in VCS6 VLBA observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/136/580/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/136/580/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/136/580/table5?GETtext/xml+votable180.050000true21.519875-1.30450.0055555555555555566/494 521 692 1001 1173 1181 1808 1873 1905 1925 2054 2354 2477 2549 2744 2861 2952 3072 3423 3482 3491 3492 3537 3598 3759 3820 3845 3846 3876 4544 4628 4705 4723 4944 5465 5516 5801 5807 5878 5935 6115 6117 6121 6280 6319 6335 6639 6651 6734 6821 6877 7149 7475 7698 7716 7902 7944 8091 8106 8131 8255 8298 8321 8588 8641 8660 8758 8813 8976 9483 9524 9860 9970 10047 10058 10213 10224 10250 10460 10634 10761 11006 11039 11061 11067 11116 11226 11242 11317 11398 11515 11536 11540 11542 11631 11693 11714 11783 11844 11887 11923 11931 11957 12001 12091 12216 12311 12328 13414 13447 13528 13739 13820 13995 14383 14653 14731 14996 15112 15211 15260 15266 15277 15324 15390 15458 15555 15578 15670 15692 15725 15740 15774 15788 15809 15973 15979 16056 16065 16129 16260 16492 16698 16774 16777 16810 16813 17067 17089 17105 17171 17174 17195 17236 17417 17639 17642 17662 17904 18001 18365 19027 19343 19655 19726 19750 20009 20157 20184 20566 20654 20773 20912 20975 21018 21055 21266 21711 21767 21903 22080 22386 22614 22828 23096 23274 23497 23776 24063 24312 24550 24568 25018 25020 25375 25659 25800 25824 26073 26095 26111 26531 26797 26854 26859 27086 27302 27440 27520 27605 27705 27750 27964 28370 28652 28858 28986 28998 29070 29251 29271 29477 29595 29703 29833 30533 30557 30569 30996 31202 31771 31826 31891 32012 32025 32031 32130 32346 32424 32580 34683 34740 34767 35771 36018 36176 36186 36241 36391 36528 36602 36607 36666 36754 38759 38853 38861 40329 40350 40621 40658 40690 40858 40931 42955 43967 43978 43995 44099 44141 44170 44265 44389 44412 44700 46963 47050 47986 48252 48388 48421 48732 48821 490831.5239959695752804e-24 5.6984200832293834e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/136/580?format=asciiRadiodefaultJ/AJ/136/580/table4The VCS6 catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCat[CNU] Category (1)meta.codecharIVSThe IVS name (HHMM-DDd, B1950)meta.idcharIAUThe IAU name (JHHMM-DDMM, J2000.0)meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.maine_RAJ2000Inflated error in Right Ascensionmasstat.error;pos.eq.rafloatDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.maine_DEJ2000Inflated error in Declinationmasstat.error;pos.eq.decfloatCorrCorrelation between Right Ascension and Declinationstat.correlationfloatNobsNumber of observations usedmeta.numberintl_S(X)Limit flag on S(X)meta.code.errorcharS(X)? X-band (8.6GHz) total flux density integrated over entire mapJyphot.flux.density;em.radio.6-12GHzfloatnullablel_S(X)uLimit flag on S(X)umeta.code.errorcharS(X)u? X-band (8.6GHz) unresolved flux density at longest VLBA baselinesJyphot.flux.density;em.radio.6-12GHzfloatnullablel_S(S)Limit flag on S(S)meta.code.errorcharS(S)? S-band (2.3GHz) total flux density integrated over entire mapJyphot.flux.density;em.radio.1500-3000MHzfloatnullablel_S(S)uLimit flag on S(S)umeta.code.errorcharS(S)u? S-band (2.3GHz) unresolved flux density at longest VLBA baselinesJyphot.flux.density;em.radio.1500-3000MHzfloatnullableBand[X/S ] Band used for position estimation: X(8.6GHz), S(2.3GHz), X/S(both)instr.bandpasscharlistInput list name (2)meta.codecharJ/AJ/136/580/table5Sources not detected in VCS6 VLBA observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIVSThe IVS name (HHMM-DDd,B1950)meta.idcharIAUThe IAU name (JHHMM-DDMM, J2000)meta.id;meta.maincharRAJ2000Hour of Right ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.main