J/AJ/155/110ivo://CDS.VizieR/J/AJ/155/110doi:10.26093/cds/vizier.51550110CDSYang J.Wu X.-B.Liu D.Fan X.Yang Q.Wang F.Mcgreer I.D.Fan Z.,Yuan S.Shan H.2018-11-30T12:34:44Z2018-11-09T06:35:25ZCDS support team

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

cds-question@unistra.frquasarsinfrared-photometryvisible-astronomysloan-photometryredshiftedWe report the results of a faint quasar survey in a one-square-degree field. The aim is to test the Y-K/g-z and J-K/i-Y color selection criteria for quasars at faint magnitudes to obtain a complete sample of quasars based on deep optical and near-infrared color-color selection and to measure the faint end of the quasar luminosity function (QLF) over a wide redshift range. We carried out a quasar survey based on the Y-K/g-z and J-K/i-Y quasar selection criteria, using the deep Y-band data obtained from our CFHT/WIRCam Y-band images in a two-degree field within the F22 field of the VIMOS VLT deep survey, optical co-added data from Sloan Digital Sky Survey Stripe 82 and deep near-infrared data from the UKIDSS Deep Extragalactic Survey in the same field. We discovered 25 new quasars at 0.5<z<4.5 and i<22.5 mag within one-square-degree field. The survey significantly increases the number of faint quasars in this field, especially at z~2-3. It confirms that our color selections are highly complete in a wide redshift range (z<4.5), especially over the quasar number density peak at z~2-3, even for faint quasars. Combining all previous known quasars and new discoveries, we construct a sample with 109 quasars and measure the binned QLF and parametric QLF. Although the sample is small, our results agree with a pure luminosity evolution at lower redshift and luminosity evolution and density evolution model at redshift z>2.5.2018AJ....155..110Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/155/110CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)III/269 : VIMOS VLT Deep Survey (VVDS) (Le Fevre+, 2013)VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)VII/279 : SDSS quasar catalog: twelfth data release (Paris+, 2017)J/MNRAS/386/1605 : Luminous K-band selected QSOs from UKIDSS (Maddox+, 2008)J/MNRAS/406/1583 : Quasar from SDSS and UKIDSS (Wu+, 2010)J/AJ/142/78 : New 2.2<z<3 quasars from SDSS and UKIDSS (Wu+, 2011)J/ApJ/768/105 : z~5 QSO luminosity function from SDSS Stripe 82J/AJ/154/269 : A new photo-z method for quasars in Stripe 82 (Yang+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/155/110https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/155/110http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/155/110https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/155/110https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/155/110http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/155/110GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/155/110/table1 (Quasar in the one-square-degree field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/155/110/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/155/110/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/155/110/table1?GETtext/xml+votable180.050000true334.50679170.01143890.0055555555555555566/19030 19031 19033 19036 190378.305533028865447e-20 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/155/110?format=asciiInfraredOpticaldefaultJ/AJ/155/110/table1Quasar in the one-square-degree fieldimag[17.26/22.34] SDSS i band magnitudemagphot.mag;em.opt.IfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQSOQuasar name (JHHMMSS.ss+DDMMSS.ss)meta.id;meta.maincharz[0.521/4.22] Redshiftsrc.redshiftfloatr_zReference for z (SDSS, VVDS or This work)meta.ref;pos.framechar1450Mag[-27/-20.07] Absolute AB magnitude at the rest-frame 1450 {AA}magphys.magAbsfloatgmag[17.36/23.31] SDSS g band magnitudemagphot.mag;em.opt.Bfloate_gmag[0.001/0.075] Uncertainty in gmagmagstat.error;phot.mag;em.opt.Bfloate_imag[0.001/0.96] Uncertainty in imagmagstat.error;phot.mag;em.opt.Ifloatzmag[17.34/22.36] SDSS z band magnitudemagphot.mag;em.opt.Ifloate_zmag[0.003/0.285] Uncertainty in zmagmagstat.error;phot.mag;em.opt.IfloatYmag[17/21.63] CFHT/WIRCam Y band Vega magnitudemagphot.mag;em.IR.Jfloate_Ymag[0.003/0.089] Uncertainty in Ymagmagstat.error;phot.mag;em.opt.BfloatJmag[16.69/21.16] UKIDSS J band Vega magnitudemagphot.mag;em.IR.Jfloate_Jmag[0.005/0.077] Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatKmag[15.74/19.98] UKIDSS K band Vega magnitudemagphot.mag;em.IR.Kfloate_Kmag[0.004/0.082] Uncertainty in Kmagmagstat.error;phot.mag;em.IR.KfloatSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlchar_RAPosition from the QSO name (right ascension part)degpos.eq.ra;meta.main_DEPosition from the QSO name (declination part)degpos.eq.dec;meta.main