J/MNRAS/260/202ivo://CDS.VizieR/J/MNRAS/260/202doi:10.26093/cds/vizier.72600202CDSHAWKINS M.R.S.VERON P.2024-06-20T20:14:32Z1997-12-09T21:37:02ZCDS support team

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

cds-question@unistra.frquasarsredshiftedphotometryA sample of quasars is selected from a 10-yr sequence of 30 UK Schmidt plates. Luminosity functions are derived in several redshift intervals, which in each case show a featureless power-law rise towards low luminosities. There is no sigh of the 'break' found in the recent UVX sample of Boyle, Shanks & Peterson. It is suggested that reasons for the disagreement are connected with biases in the selection of the UVX sample. The question of the nature of quasar evolution appears to be still unresolved.1993MNRAS.260..202Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/260/202CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/321/123 : Optical variability of QSOs (Cristiani+ 1997)J/A+AS/143/357 : Tuorla Quasar Monitoring (Katajainen+ 2000)J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)J/A+A/353/77 : Luminous QSO variability & polarization (Teerikorpi+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/260/202https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/260/202http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/260/202https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/260/202https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/260/202http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/260/202GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/260/202/table2 (List of quasars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/260/202/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/260/202/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/260/202/table2?GETtext/xml+votable180.050000true321.7492256-44.26873690.0055555555555555565/11681 11683-11684 6/46637-46639 46648 46650-46651 46654 46721-46723 46728-46729 46740 467444.0234554602041486e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/260/202?format=asciiOpticaldefaultJ/MNRAS/260/202/table2List of quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameQuasar name (1)meta.id;meta.maincharRA1950Right ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainBmagB magnitude at minimummagphot.mag;em.opt.BfloatU-BU-B colourmagphot.color;em.opt.U;em.opt.BfloatSigniSignificance parameter (2)stat.fit.goodnessfloatzRedshiftsrc.redshiftfloatMBAbsolute B magnitude at minimummagphys.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