J/AJ/122/518ivo://CDS.VizieR/J/AJ/122/518doi:10.26093/cds/vizier.51220518CDSHewett P.C.Foltz C.B.Chaffee F.H.2023-04-06T16:50:46Z2002-07-20T23:00:53ZCDS support team

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

cds-question@unistra.frquasarssurveysThe source catalog for the Large Bright Quasar Survey (LBQS) and the FIRST Survey are compared in their regions of overlap to assess the efficiency of the LBQS selection algorithms. In the 270 deg^2^ common to both surveys, the LBQS contains ~100,000 stellar and ~40,000 nonstellar objects, while the FIRST catalog contains ~25,000 sources. Cross-correlation of these lists yields 67 positional coincidences between known LBQS quasars and FIRST sources and an additional 19 stellar and 149 nonstellar positional coincidences with the radio catalog. Spectroscopy of all the stellar matches and two-thirds of the nonstellar matches using the Keck I Telescope and the 6.5 m MMT produces eight new quasars. One BL Lac object, previously misclassified during the LBQS survey is also identified. The straightforward fractional incompleteness of the LBQS determined from this sample is 13%+/-4%, in good agreement with the published estimate of 10%.2001AJ....122..518Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/122/518CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/109/1498 : Large Bright Quasar Survey VI (LBQS) (Hewett+, 1995)VII/182 : Catalogue of high-redshift QSOs, z>=2.2, in SGP & F401 (Warren+ 1991)VIII/59 : The FIRST Survey, version 1999Jul (White+ 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/122/518https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/122/518http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/122/518https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/122/518https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/122/518http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/122/518GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/122/518/table1 (New LBQS quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/518/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/518/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/518/table1?GETtext/xml+votable180.050000true10.8448333-26.65169440.005555555555555556Cone search capability for table J/AJ/122/518/table2 (LBQS-FIRST Quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/518/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/518/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/518/table2?GETtext/xml+votable180.050000true0.5936667-0.07872220.005555555555555556Cone search capability for table J/AJ/122/518/table3 (LBQS-FIRST stellar matches)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/518/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/518/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/518/table3?GETtext/xml+votable180.050000true3.2553333-0.45341670.005555555555555556Cone search capability for table J/AJ/122/518/table4 (LBQS-FIRST non-stellar matches)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/518/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/518/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/518/table4?GETtext/xml+votable180.050000true0.744250.14188890.005555555555555556Cone search capability for table J/AJ/122/518/table5 (Additional LBQS-FIRST quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/518/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/518/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/518/table5?GETtext/xml+votable180.050000true15.13425-2.01286110.0055555555555555565/4520-4521 6462 6545 6548 6592 6/0 3 8200 16652 17399 17407 17749 17751 17757 17973 17990 17994-17996 18010-18011 18016 18021-18025 18027-18028 18031 18033-18034 18054 18060-18061 18063 18066-18067 18073 18075 18090-18094 18096-18097 18104 18685 18772-18773 18775 18828 18831 18848 18850 18852 18854-18857 18862 18864 18866 19457 23209 23211 25823 25843-25844 25847 25853-25854 25925-25926 25931-25932 25934-25935 25937-25939 25948 25951 25956-25957 25968 25970 25974 25977 25995 25998 26018-26019 26021-26022 26024 26026 26029 26040 26166 26170-26171 26174-26175 26189 26197-26199 26201 26203 26205-26206 26219 26225 26228 26245 26259-26260 26263 26308 26313-26314 26373 26376 26863 26872-26873 26875-26876 26878 26947-26949 26951 26955 26957 26961-26962 26966 26970-26971 26974 26983 26989 26993-26994 26996 27000 27207 27217-27219 27221-27222 27225 27227 27229-27231 27249 27253 27393-27394 27398 27749 35753 35757 36853-36855 36860 36862-36863 46725 46739https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/122/518?format=asciiOpticaldefaultJ/AJ/122/518/table1New LBQS quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLBQSLBQS namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzRedshiftsrc.redshiftfloatBjmagB_J_ magnitudemagphot.mag;em.opt.BfloatFieldFieldobs.fieldcharNotes[a-f] Individual notes (1)meta.notecharJ/AJ/122/518/table2LBQS-FIRST QuasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLBQSThe LBQS name (1)meta.id;meta.maincharRAJ2000Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainz? Redshiftsrc.redshiftfloatnullablef_z[?] Indicates an unknown redshiftmeta.code.errorcharBjmagThe B_J_ band magnitudemagphot.mag;em.opt.BfloatFIRSTThe FIRST source name and positionmeta.idcharFluxFIRST integrated radio flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloate_FluxThe rms uncertainty in FluxmJystat.errorfloatSepAngular separation between LBQS and FIRST sourcesarcsecpos.angDistancefloatLogR? Log of the k-corrected radio to optical flux ratiophot.flux;arith.ratiofloatnullableNotesOther notes (2)meta.notecharJ/AJ/122/518/table3LBQS-FIRST stellar matchesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBjmagB_J_ magnitudemagphot.mag;em.opt.BfloatFIRSTFIRST source designationmeta.idcharFluxFIRST integrated radio flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloate_Fluxrms uncertainty on FluxmJystat.errorfloatSepAngular separation between LBQS and FIRST sourcesarcsecpos.angDistancefloatQSOLBQS classificationsrc.classcharSpClassSpectroscopic classificationsrc.spTypecharz? Redshiftsrc.redshiftfloatnullableObsOrigin of the spectroscopymeta.refcharJ/AJ/122/518/table4LBQS-FIRST non-stellar matchesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBjmagB_J_ magnitudemagphot.mag;em.opt.Bfloatu_Bjmag[)] Uncertainty flag on Bjmagmeta.code.errorcharFIRSTFIRST source designationmeta.idcharFluxFIRST integrated radio flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloate_Fluxrms uncertainty on FluxmJystat.errorfloatSepAngular separation between LBQS and FIRST sourcesarcsecpos.angDistancefloatz? Redshiftsrc.redshiftfloatnullablen_z[S] S: starmeta.notecharObsOrigin of the spectroscopic classificationmeta.refcharNotes[a-d] Individual notes (1)meta.notecharJ/AJ/122/518/table5Additional LBQS-FIRST quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJNameName derived from the J2000 coordinatesmeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainz? Redshiftsrc.redshiftfloatnullablef_z[?] ? when redshift unknownmeta.code.errorcharBjmagB_J_ magnitudemagphot.mag;em.opt.Bfloatn_Bjmag[a] a: Magnitude estimated using peak intensity from APM scan of UKST platemeta.notecharFIRSTFirst source designationmeta.idcharFluxFIRST integrated radio flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloate_Fluxrms uncertainty on FluxmJystat.errorfloatSepAngular separation between LBQS and FIRST sourcesarcsecpos.angDistancefloatlogR*k-corrected ratio of radio-to-optical flux for each optical-radio associationphot.flux;arith.ratiofloatn_logR*[b] b: Individual note (1)meta.notecharQSOLBQS classificationsrc.classcharSpClasSpectroscopic classificationsrc.classchar