J/A+A/399/469ivo://CDS.VizieR/J/A+A/399/469doi:10.26093/cds/vizier.33990469CDSHook I.M.Shaver P.A.Jackson C.A.Wall J.V.Kellermann K.I.2018-01-10T11:47:47Z2003-03-27T06:04:40ZCDS support team

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

cds-question@unistra.frquasarsredshiftedWe present optical spectra and redshift measurements for 178 flat-spectrum objects from the Parkes quarter-Jansky flat-spectrum sample. These spectra were obtained in order to compile a complete sample of quasars for use in a study of quasar evolution. We present a composite optical spectrum made from the subset of 109 quasars that have flux densities in the range 0.25Jy<S(2.7GHz)<0.5Jy, and make a comparison with a composite spectrum for radio-quiet QSOs from the Large Bright Quasar Survey. Our large sample of radio-loud quasars allows us to strengthen previous reports that the Ly and CIV emission lines have larger equivalent width in radio-loud quasars than radio-quiet QSOs to greater than the 3{sigma} level. However we see no significant difference in the equivalent widths of CIII] or MgII. We also show that the flux decrements across the Lyman-{alpha} line (DA) measured from these spectra show the same trend with redshift as for optically selected QSOs.2003A&A...399..469Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/399/469CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/34 : Parkes Half-Jansky Flat-Spectrum Sample (Drinkwater + 1997)J/A+A/386/97 : Parkes Quarter-Jansky Flat-Spectrum Sample. I. (Jackson+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/399/469https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/399/469http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/399/469https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/399/469https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/399/469http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/399/469GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/399/469/tablea1 (Redshifts for the Parkes quarter-Jansky flat-spectrum sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/399/469/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/399/469/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/399/469/tablea1?GETtext/xml+votable180.050000true0.863667-15.7845280.0055555555555555566/1 16483 16485 16518 16532 16562 16813 17048 17094 17165 17401 17472 17516 17617-17618 17665 17718 18000 18048 18066 18436 18491 18644 18743 18821 18853 18865 19027 19043 19085 19202 20577 20610 20770 20888 21154 21254 22719 22926 22943 23306 24796 24941 24994 25094 25128 25174 25213 25225 25307 25427 25443-25444 25501 25621 25626 25654 25659 25677 25689 25742 25750 25816 25829 25863 26119 26126 26624 26695 26885 26946 27249 27302 27311 30012 30942 31079 31135 31157 33155 34026 34044 34046 34146 34238 34371 34551 34568 34572 34699 35016 35281 35318 35475 35522 35579 35631 35764 35768 35786 35816 35849 35889 35960 36111 36113 36138 36151 36295 36333 36459 36491 36609 36640 36840 36842 37440 38141 38373 38477 38638-38639 38715 38740 38744 38787-38788 38880 39129 39489 39566 39592 39601 39622 39672 39848 40515 43337 43483 43578 43628 43714-43715 43739 43765 43821 43865 43884 43888 43996 44068-44069 44113 44144 44166 44260 44563 44670 44705 44799 45006 45424 46374 46423 46448 46490 46529 46542 46932 46966 47564 48137 48142 48483 48913 48974https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/399/469?format=asciiOpticaldefaultJ/A+A/399/469/tablea1Redshifts for the Parkes quarter-Jansky flat-spectrum samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQSO name (BHHMM-DDd)meta.id;meta.maincharprimaryn_Name[*] for a note detailed in notes.dat filemeta.notecharz? Redshiftsrc.redshiftfloatnullableConf[0/2] Level of confidence of the redshift (1)meta.code.qualintClassClassification, reproduced from Jackson et al. (2002, Cat. <J/A+A/386/97>) (2)src.classcharDateObservation datetime.epochnullableLinkDetails on the Quarter-Jy Catalog by Jackson et al. (J/A+A/386/97)meta.refcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/399/469/notesIndividual notesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharNoteText of the notemeta.notechar