J/AJ/123/637ivo://CDS.VizieR/J/AJ/123/637doi:10.26093/cds/vizier.51230637CDSDe Breuck C.van Breugel W.Stanford S.A.Rottgering H.Miley G.,Stern D.2023-04-06T16:50:49Z2003-07-10T09:04:18ZCDS support team

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

cds-question@unistra.frradio-sourcesredshiftedgalaxiesphotometryWe present optical and/or near-IR images of 128 ultra-steep-spectrum radio sources. Roughly half of the objects are identified in the optical images (R<~24), while in the near-IR images, more than 94% are detected at K<~22. The mean K magnitude is 19.26 within a 2" diameter aperture. The distribution of R-K colors indicates that at least one-third of the objects observed have very red colors (R-K>5). The major axes of the identifications in the K band are preferentially oriented along the radio axes, with half of them having compact morphologies. The 22 sources with spectroscopic redshifts and K-band magnitudes follow the K-z relation found from previous radio samples, but with a larger scatter.2002AJ....123..637Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/637CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/93/399 : Optical id. of steep spectrum radio sources (Wieringa+ 1992)J/A+AS/108/79 : Ultra-steep spectrum radiosources (Roettgering+, 1994)J/A+AS/143/303 : Ultra steep spectrum radio sources catalog (De Breuck+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/123/637https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/123/637http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/123/637https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/123/637https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/123/637http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/123/637GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/123/637/table6 (Astrometric Data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/123/637/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/123/637/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/123/637/table6?GETtext/xml+votable180.050000true0.120333346.91130560.0055555555555555566/736 984 988 1009 1190 1536 2245 2286 2327 2617 2710 2750 3417 3550 3999 5233 5275 5955 6037 6359 6619 6861 6899 6926 6964 7007 7556 7850 8918 9013 9050 9127 9190 9200 9386 9647 9677 9743 9768 9780 9826 10189 10347 10415 10475 10630 10809 10812 11173 11520 11889 13495 13514 13562 13719 13733 14985 15167 15244 15315 15332 15335 16005 16023 16034 16139 17547 17917 18401 20163 20443 20483 21171 21478 21845 22790 23463 23473 24726 25141 25269 25274 25356 25490 25500 26673 26690 28590 29766 32619 32765 32812 33202 33311 33459 33706 33942 35158 35717 36590 38741 38907 40159 40237 40326 40395 40740 40825 40844 41285 41300 42996 44713 45094 45169 45862 45882 45925 46097 47884 47956 48742 48803 48871 48877https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/123/637?format=asciiOpticalRadiodefaultJ/AJ/123/637/table5Optical Photometry of USS SourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DVR2000]Source namemeta.id;meta.maincharz? Redshiftsrc.redshiftfloatnullableRunObservation run numbermeta.id;obscharFilt[I R r_S_] Filter (1)meta.code;instr.filtercharl_MagLimit flag on Magmeta.code.errorcharMag? Magnitude within 4'' diameter aperturemagphot.magfloatnullableu_Mag[:] Uncertainty flag in Magmeta.code.errorcharf_Mag[ad] Flag on Mag (2)meta.code.errorcharJ/AJ/123/637/table6Astrometric DatarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DVR2000]Source name (1)meta.id;meta.maincharprimaryPosSource position (2)instr.bandpassRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJ/AJ/123/637/table7K-band Photometry and MorphologyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[DVR2000]Source namemeta.id;meta.maincharz? Redshiftsrc.redshiftfloatnullableu_z[:] Uncertainty flag on zmeta.code.errorcharRunObservation run numbermeta.id;obscharFilt[K k' K_S_ K_s_] Filter (1)meta.code;instr.filtercharK(A)K-band extinction from H I column densitymagphys.absorptionfloatl_2magLimit flag on 2magmeta.code.errorchar2magMagnitude within 2'' diameter aperturemagphot.magfloate_2mag? Error in 2mag (2)magstat.errorfloatnullablef_2mag[d] Flag on 2mag (3)meta.code.errorchar4mag? Magnitude within 4'' diameter aperturemagphot.magfloatnullablee_4mag? Error in 4mag (2)magstat.errorfloatnullablef_4mag[d] Flag on 4mag (3)meta.code.errorchar8mag? Magnitude within 8'' diameter aperturemagphot.magfloatnullablee_8mag? Error in 8mag (2)magstat.errorfloatnullablef_8mag[d] Flag on 8mag (3)meta.code.errorcharl_HLRadLimit flag on Radmeta.code.errorcharHLRad? The half-light radiusarcsecphys.angSize;srcfloatnullableEllipt? Ellipticitysrc.ellipticityfloatnullablePA? Position angledegpos.posAngintnullableMorphMorphology informationsrc.morph.typechar