J/AJ/142/35ivo://CDS.VizieR/J/AJ/142/35doi:10.26093/cds/vizier.51420035CDSPetrov L.Kovalev Y.Y.Fomalont E.B.Gordon D.2017-12-22T05:33:31Z2011-06-29T07:32:51ZCDS support team

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

cds-question@unistra.frastrometryvery-long-baseline-interferometryoptical-observationcatalogsradio-sourcesWe presents accurate absolute positions from a 24 GHz Very Long Baseline Array (VLBA) search for compact extragalactic sources in an area where the density of known calibrators with precise coordinates is low. The goals were to identify additional sources suitable for use as phase calibrators for galactic sources, determine their precise positions, and produce radio images. In order to achieve these goals, we developed a new software package, PIMA, for determining group delays from wide-band data with much lower detection limit. With the use of PIMA we have detected 327 sources out of 487 targets observed in three 24 hour VLBA experiments. Among the 327 detected objects, 176 are within 10 degrees of the Galactic plane. This VGaPS catalogue of source positions, plots of correlated flux density versus projected baseline length, contour plots, as well as weighted CLEAN images and calibrated visibility data in FITS format, are available on the Web at http://astrogeo.org/vgaps. Approximately one half of objects from the 24GHz catalogue were observed at dual band 8.6GHz and 2.3GHz experiments. Position differences at 24GHz versus 8.6/2.3GHz for all but two objects on average are strictly within reported uncertainties. We found that for two objects with complex structure positions at different frequencies correspond to different components of a source.2011AJ....142...35Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/142/35CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/414/2528 : LBA Calibrator Survey. LCS1. (Petrov+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/142/35https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/142/35http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/142/35https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/142/35https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/142/35http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/142/35GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/142/35/table9 (VGaPS catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/142/35/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/142/35/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/142/35/table9?GETtext/xml+votable180.050000true0.2795827166760.856332777780.005555555555555556Cone search capability for table J/AJ/142/35/table10 (The list of 160 sources that have not been detected in VGaPS observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/142/35/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/142/35/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/142/35/table10?GETtext/xml+votable180.050000true0.5019583355.177222220.0055555555555555566/161 180 250 255 269 459 521 593 692 994 1001 1018 1109 1128 1187 1210 1239 1286 1297 1312 1327 1336 1339 1350 1399 1413 1423 1433 1450 1549 1622 1632 1654 1763 1765 1767 1782 1787 1801 1808 1817 1826 1831 1852 1894 1905 1925 1953 1956 1986 2024 2054 2089 2104 2172 2225 2228 2308 2494 2810 2895 2903 2927 2929 2931 2932 2986 2987 3002 3016 3017 3024 3042 3044 3050 3052 3057 3105 3135 3158 3165 3170 3181 3183 3188 3199 3206 3208 3244 3272 3316 3320 3321 3330 3333 3428 3595 3598 3613 3642 3644 3649 3652 3654 3656 3659 3675 3688 3710 3712 3737 3741 3742 3749 3752 3755 3761 3781 3783 3784 3794 3819 3841 3999 4032 4235 4307 4315 4352 4353 4358 4620 4624 5139 5264 5652 5657 6359 7131 7872 7902 8413 8461 8528 8577 8658 8718 8915 8918 8948 9003 9075 9098 9524 10004 10802 10803 10978 11041 11091 11164 11191 11233 11408 11822 11943 12166 12216 12487 12973 13033 13047 13224 13234 13292 13293 13659 13676 13711 13757 13771 13892 14009 14051 14068 14214 14234 14237 14240 14253 14267 14280 14282 14291 14299 14304 14306 14343 14441 14549 14608 14620 14622 14624 14629 14646 14653 14682 14694 14704 14711 14853 14933 15172 15370 15373 15377 15429 15448 15456 15458 15462 15463 15467 15474 15488 15489 15508 15623 15633 15667 15672 15681 15683 15692 15697 15709 15769 16223 16239 16333 16355 16698 16805 17407 17680 17685 17904 18006 18365 18784 18939 19027 19629 19694 19968 19996 20018 20019 20188 20213 20980 21049 21504 21522 21537 21554 21644 21657 21668 21707 22049 22064 22080 22083 22122 22216 22256 22263 22271 22275 22276 22433 22557 22595 22657 22767 22980 23325 23364 23366 23401 23548 23621 23642 23644 23658 23664 23665 23674 23745 23776 23783 23802 23805 23854 23946 23966 23969 23984 23990 24151 24154 24185 24311 24325 24333 24344 24349 24464 24465 24497 24506 24550 24554 24941 24947 24952 25403 25442 25467 25493 25501 25503 25568 25707 25835 26025 26027 26035 26064 26883 26896 27238 27578 27579 27583 27773 27944 28067 28070 28282 28384 28416 28446 28763 28778 28789 28790 28822 28824 28829 28830 28858 28913 29056 29063 29091 29097 29100 29112 29113 29115 29155 29193 29213 29220 29252 29263 29504 29509 29535 29546 29554 29991 29998 30075 30219 30248 30262 30267 30302 30312 30314 30323 30385 30401 30417 30420 30507 30511 30601 30604 30613 30618 30657 30688 30694 31407 31568 32163 32344 32580 35771 35960 36117 36370 36452 36573 36736 38833 39377 39406 39708 39775 39780 39883 39887 39894 39920 39923 39924 39940 40066 40279 40601 40619 40633 40635 40657 40658 40690 40692 40727 40735 40831 40917 40946 42457 42482 42492 42994 43863 43870 43884 43888 44059 44173 44586 44662 44705 44714 44958 45011 484861.4577353054677623e-23 1.4577353054677623e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/142/35?format=asciiOpticalRadiodefaultJ/AJ/142/35/table9VGaPS catalogueSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCat[CNU] Category: Calibrator, Non-calibrator, or Unreliable coordinatesmeta.codecharBnameIVS B1950 source namemeta.idcharJnameIAU J2000 source namemeta.id;meta.maincharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.maine_RAJ2000Inflated right ascension position uncertainty (without cos({delta}) factor)masstat.error;pos.eq.rafloatDEJ2000Declination (J2000.0)pos.eq.dec;meta.maine_DEJ2000Inflated declination position uncertaintymasstat.error;pos.eq.decfloatCorr[-1/1] Correlation between estimates of right ascension and declinationstat.correlationfloatNobsNumber of used observationsmeta.numberintFtotK-band (22GHz) total correlated flux density integrated over entire mapJyphot.flux.density;em.radio.12-30GHzfloatl_FuncLimit flag on Funcmeta.code.errorcharFuncK-band (22GHz) unresolved correlated flux density at long VLBA baselinesJyphot.flux.density;em.radio.12-30GHzfloatSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlcharJ/AJ/142/35/table10The list of 160 sources that have not been detected in VGaPS observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBnameThe IVS source name; B1950.0meta.idcharJnameThe IAU source name; J2000.0meta.id;meta.maincharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainGLATGalactic latitudedegpos.galactic.latfloatFlux? Flux density extrapolated at 22GHzmJyphot.flux.density;em.radio.12-30GHzintnullablealpha? Spectral index {alpha} (in sense F{prop.to}{nu}^{alpha}^)spect.indexfloatnullableo_alphaNumber of points for {alpha} computationmeta.numberintSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlchar