VII/182ivo://CDS.VizieR/VII/182CDSWarren S.J.Hewett P.C.Irwin M.J.Osmer P.S.2012-11-13T05:49:46Z2004-07-24T20:22:49ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsquasars(Paper I) We provide details of a multicolor ( u, b_j_, v, or, r, i), wide-field, faint magnitude survey for high-redshift (z >= 2.2 ) quasars. The survey extends over the magnitude range 16<=m_or_<=20 and covers a total area of 58.6 square degrees. Sources of incompleteness in the photometric catalog are quantified, giving the survey an effective area of 45.7 square degrees. Particular attention is paid to the details of the plate-matching and image-classification procedures used in the generation of the photometric catalog from which quasars are selected, in order that the number of spurious quasar candidates be kept to an absolute minimum. The selection of candidates incorporates a number of novel features, including treating the multicolor information as low-resolution spectra, adopting a quantitative candidate identification algorithm that employs all the available information, and requiring only that objects be detected in the or passband. We describe how model quasar spectra are used to calculate the selection function for the survey, and we present the computed sample completeness, as a function of redshift and magnitude, for a range of representative quasar types. The spectroscopic results of the survey are reported in a companion paper and the derivation of the quasar luminosity function at high redshift will be reported in a third paper. (Paper II; see also documentation files "doc.tex" or "doc.txt") In a wide-field multicolor survey (45.7 deg^2^, 16.0<=m_or_<=20.0) we have discovered 130 new quasars, of which 100 are of redshift z>=2.2. There are 49 new quasars of redshift z>=3.0 including three of z>=4.0. We provide spectra, coordinates, redshifts, broad-band magnitudes (u, b_j_, v, or, r, i), line-equivalent widths for Lyman-{alpha}/NV and CIV, FWHM CIV, and continuum spectral indices for all the new quasars. The sample includes 96 quasars selected according to the rigid criteria detailed in the companion paper by Warren, Hewett, Irwin, and Osmer. These are combined with 14 previously known quasars in one of our fields, which also meet these selection criteria, to form a complete sample. The median equivalent width for Lyman-{alpha}/NV for the complete sample is 67A, and for CIV is 31{AA}. The median FWHM CIV is 35{AA} and the median spectral index is {alpha}=-0.60. The complete sample contains at least five broad absorption-line quasars. We have obtained spectra of a total of 473 multicolor selected candidates. The proportion of quasars found, including previously known quasars, of all redshifts, is 30%. The proportion of quasars of redshift z>=2.2 in the list of candidates that satisfy the selection criteria of the complete sample is 43%. Finally we limit the sample to the 85 objects of redshift z>=2.2 in the complete sample, and summarize the relevant observational data input to the calculation of the luminosity function, comprising the redshift versus magnitude distribution and the distribution of the spectral properties. The analysis of the luminosity function will be presented in a forthcoming paper.1991ApJS...76....1Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/VII/182CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=VII/182https://vizier.iucaa.in/viz-bin/VizieR-2?-source=VII/182http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=VII/182https://vizier.cds.unistra.fr/viz-bin/votable?-source=VII/182https://vizier.iucaa.in/viz-bin/votable?-source=VII/182http://vizieridia.saao.ac.za/viz-bin/votable?-source=VII/182GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table VII/182/table4 (Known non-UV-excess QSOs in the SGP (paper I))https://vizier.cds.unistra.fr/viz-bin/conesearch/VII/182/table4?https://vizier.iucaa.in/viz-bin/conesearch/VII/182/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/VII/182/table4?GETtext/xml+votable180.050000true10.9282439-26.36942630.005555555555555556Cone search capability for table VII/182/tables (High-z QSOs in SGP and F401 (paper II, tables 1-4))https://vizier.cds.unistra.fr/viz-bin/conesearch/VII/182/tables?https://vizier.iucaa.in/viz-bin/conesearch/VII/182/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/VII/182/tables?GETtext/xml+votable180.050000true10.5828258-30.18539590.005555555555555556Cone search capability for table VII/182/table5 (previously-known high-z QSOs in SGP (paper II))https://vizier.cds.unistra.fr/viz-bin/conesearch/VII/182/table5?https://vizier.iucaa.in/viz-bin/conesearch/VII/182/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/VII/182/table5?GETtext/xml+votable180.050000true10.9659362-26.85782080.005555555555555556Cone search capability for table VII/182/table6 (new UV excess quasars (paper II))https://vizier.cds.unistra.fr/viz-bin/conesearch/VII/182/table6?https://vizier.iucaa.in/viz-bin/conesearch/VII/182/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/VII/182/table6?GETtext/xml+votable180.050000true12.6604784-27.30654830.0055555555555555565/4160 4161 4163 4164 8937 8939 6/16469 16649 16664 35583 35747 35752 35753 35755 35760 35762 35763 35768 35769 35770 35772 35774 47479 47485 48142 48143 48154 48161 48162 48163 48165 48166 48167 48168 48169 48170 48173 48174 48175 48178 48182 48185 48257 48259 48260 48261 48262 48268https://cdsarc.cds.unistra.fr/viz-bin/moc/VII/182?format=asciiOpticaldefaultVII/182/table4Known non-UV-excess QSOs in the SGP (paper I)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAB1950[0,1]+= right ascension (B1950)pos.eq.ra;meta.mainDEB1950declination (B1950)pos.eq.dec;meta.mainl_m(u)[>] limit flag on m(u)meta.code.errorcharm(u)u-band UKST magnitudemagphot.mag;em.opt.Ufloatm(bj)bj-band UKST magnitudemagphot.mag;em.opt.Bfloatm(v)v-band UKST magnitudemagphot.mag;em.opt.Vfloatm(or)or-band (600-690nm) UKST magnitudemagphot.mag;em.opt.Rfloatm(r)r-band (640-690nm) UKST magnitudemagphot.mag;em.opt.Rfloatm(i)i-band UKST magnitudemagphot.mag;em.opt.Ifloatz? redshift z (No value is given in 11th entry due to no emission lines.)src.redshiftfloatnullableListA[YN]! included in list A or not (see paper)meta.codecharListB[YN]! included in list B or not (see paper)meta.codecharr_z[1-6]! reference code for redshiftmeta.ref;pos.framechar_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.decnullableindexedVII/182/tablesHigh-z QSOs in SGP and F401 (paper II, tables 1-4)zRedshiftsrc.redshiftfloatm(or)Magnitude in broad-band UKST bandmagphot.mag;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNote[n] 'n' if there is a notemeta.notecharID[ 0-9AB-] ! Name based on 1950 coordinatesmeta.id;meta.maincharRA1950+= Right Ascension 1950pos.eq.ra;meta.mainDE1950Declination 1950pos.eq.dec;meta.mainDATE[1986,1989] UT date of observation: yeartime.epoch;obsTel[AC]! Telescope where spectrum obtained: A = AAT, C = CTIO 4 m.meta.notecharu_z[: ] Uncertainty flag for zmeta.code.error;src.redshiftcharListA[YN] "Y" if object included in List Ameta.codecharListB[YN] "Y" if object included in List Bmeta.codecharPlot[0-9SF] ! Plot number in Figure 1 (SGP) and Figure 2 (F401) (see paper)meta.ref;pos.framecharl_m(u)Limit flag (>) on m(u)meta.code.errorcharm(u)Magnitude in broad-band UKST bandmagphot.mag;em.opt.Ufloatl_m(bj)Limit flag (>) on m(bj)meta.code.errorcharm(bj)Magnitude in broad-band UKST bandmagphot.mag;em.opt.Bfloatl_m(v)Limit flag (>) on m(v)meta.code.errorcharm(v)Magnitude in broad-band UKST bandmagphot.mag;em.opt.Vfloatm(r)Magnitude in broad-band UKST bandmagphot.mag;em.opt.Rfloatl_m(i)Limit flag (>) on m(i)meta.code.errorcharm(i)Magnitude in broad-band UKST bandmagphot.mag;em.opt.IfloatW(Ly1)? Equivalent width Lyman-{alpha}/NV blend0.1nmspect.line.eqWidthintnullableu_W(Ly1)Uncertainty flag (:) on W(Ly1)meta.code.errorcharW(CIV)? Equivalent width (BAL emission) of CIV line0.1nmspect.line.eqWidthintnullableu_W(CIV)[-:] Uncertainty flag (:) on W(CIV), or dash (EM eq. width exists), or blankmeta.code.errorcharWEM(CIV)? Equivalent width (EW emission) of CIV line0.1nmspect.line.eqWidthintnullablee_W(CIV)? FWHM of W(CIV)0.1nmstat.errorintnullableu_e_W(CIV)Uncertainty flag (:) on e_W(CIV)meta.code.errorcharalpha? Spectral index (f({nu}) = {nu}**{alpha})spect.indexfloatnullableu_alpha[: ] Uncertainty flag on {alpha}meta.code.error;pos.eq.rachar_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.decnullableindexedVII/182/table5previously-known high-z QSOs in SGP (paper II)Ref[1,5] referencemeta.ref;pos.frameintzredshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAB1950[0,1] right ascension (B1950)pos.eq.ra;meta.mainDEB1950declination (B1950)pos.eq.dec;meta.mainm(or)'or' UKST (600-690nm) broad-band magnitudemagphot.mag;em.opt.RfloatW(Ly1)?rest-frame equivalent width (EW) of Lyman-{alpha}/NV blend0.1nmspect.line.eqWidthintnullableW(CIV)?rest-frame EW of CIV emission line0.1nmspect.line.eqWidthintnullableSp+Index?the spectral index derived from a power- law fit to the continuumspect.indexfloatnullable_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.decnullableindexedVII/182/table6new UV excess quasars (paper II)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[0-9-]! coordinate namemeta.id;pos.framecharRAB1950+= right ascension (B1950)pos.eq.ra;meta.mainDEB1950declination (B1950)pos.eq.dec;meta.mainDATEy[1986,1988] UT date of observation (year)yrtime.epoch;obsintzredshiftsrc.redshiftfloatm(u)broad-band UKST magnitude of 'u'magphot.mag;em.opt.Ufloatm(bj)broad-band UKST magnitude of 'bj'magphot.mag;em.opt.Bfloatm(v)broad-band UKST magnitude of 'v'magphot.mag;em.opt.Vfloatm(or)broad-band UKST magnitude of 'or' (600-690nm)magphot.mag;em.opt.Rfloatm(r)broad-band UKST magnitude of 'r'magphot.mag;em.opt.Rfloatl_m(i)[>] limit flag of showing that m(i) is the upper limitmeta.code.errorcharm(i)broad-band magnitude of 'i'magphot.mag;em.opt.Ifloat_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