J/MNRAS/275/1102ivo://CDS.VizieR/J/MNRAS/275/1102doi:10.26093/cds/vizier.72751102CDSHawkins M.R.S.Veron P.2024-06-25T20:17:23Z1997-12-09T21:40:51ZCDS support team

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

cds-question@unistra.frquasarsapparent-magnituderedshiftedIn an earlier paper (Hawkins & Veron, 1993MNRAS.260..202H) we presented quasar luminosity functions in three redshift bins, derived from a variability selected sample. Here we provide a major extension to this survey, with a view to improving statistics and completeness, and extending the redshift range. The luminosity functions for redshifts of less than 2.2 show a featureless power law of the form {phi}=10^{beta}(M-M_0_)^, with no sign of a 'break'. The quasar luminosity function is also derived by the redshift range 2.2<z<3.2, which again shows a featureless power law, but with a steeper slope. When the data are combined with a new sample of bright quasars, the quasar luminosity functions in all four redshift ranges are consistent with a single power law of index {beta}=0.63. Plots of quasar space density as a function of redshift in three luminosity bins are also presented and show strong evolution at low redshift but nearly constant space density beyond a redshift of 2.1995MNRAS.275.1102Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/275/1102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/260/202 : Quasar luminosity function (Hawkins+, 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/275/1102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/275/1102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/275/1102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/275/1102https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/275/1102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/275/1102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/275/1102/table1a (Quasars in the fibre field sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/275/1102/table1a?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/275/1102/table1a?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/275/1102/table1a?GETtext/xml+votable180.050000true320.7794882-45.60461850.005555555555555556Cone search capability for table J/MNRAS/275/1102/table1b (Quasars in the bright sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/275/1102/table1b?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/275/1102/table1b?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/275/1102/table1b?GETtext/xml+votable180.050000true319.8877183-46.5014510.005555555555555556Cone search capability for table J/MNRAS/275/1102/table1c (Quasars in the high-redshift sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/275/1102/table1c?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/275/1102/table1c?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/275/1102/table1c?GETtext/xml+votable180.050000true320.1738192-46.8510240.0055555555555555565/11659 11662 11681 11683-11684 6/46635 46654 46721-46723 46728-46729 46740 46744 467464.0234554602041486e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/275/1102?format=asciiOpticaldefaultJ/MNRAS/275/1102/table1aQuasars in the fibre field samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoQuasar numbermeta.id;meta.mainintRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainBmagB magnitude in 1977magphot.mag;em.opt.BfloatU-B? U-B color indexmagphot.color;em.opt.U;em.opt.BfloatnullablesVariability parameter (1)meta.code;src.varfloatzRedshiftsrc.redshiftfloatBMagAbsolute B magnitude in 1977magphys.magAbs;em.opt.Bfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/MNRAS/275/1102/table1bQuasars in the bright sampleNoQuasar numbermeta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainBmagB magnitude in 1977magphot.mag;em.opt.BfloatU-B? U-B color indexmagphot.color;em.opt.U;em.opt.BfloatnullablesVariability parameter (1)meta.code;src.varfloatzRedshiftsrc.redshiftfloatBMagAbsolute B magnitude in 1977magphys.magAbs;em.opt.Bfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexedJ/MNRAS/275/1102/table1cQuasars in the high-redshift samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoQuasar numbermeta.id;meta.mainintRA1950Right ascension (1950)pos.eq.ra;meta.mainDE1950Declination (1950)pos.eq.dec;meta.mainBmagB magnitude in 1977magphot.mag;em.opt.BfloatU-B? U-B color indexmagphot.color;em.opt.U;em.opt.BfloatnullablesVariability parameter (1)meta.code;src.varfloatzRedshiftsrc.redshiftfloatBMagAbsolute B magnitude in 1977magphys.magAbs;em.opt.Bfloat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed