J/AJ/130/1345ivo://CDS.VizieR/J/AJ/130/1345doi:10.26093/cds/vizier.51301345CDSEllison S.L.Hall P.B.Lira P.2017-10-09T13:34:33Z2006-07-15T12:44:43ZCDS support team

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

cds-question@unistra.frquasarsredshiftedinterstellar-mediumphotometrychemical-abundancesThe presence of dust in quasar absorbers, such as damped Ly{alpha} (DLA) systems, may cause the background QSO to appear reddened. We investigate the extent of this potential reddening by comparing the optical-to-infrared colors of QSOs with and without intervening absorbers. Our QSO sample is based on the Complete Optical and Radio Absorption Line System (CORALS) survey of Ellison and coworkers. The CORALS data set consists of 66 radio-selected QSOs at z_em_>=2.2 with complete optical identifications. We have obtained near-simultaneous B- and K-band magnitudes for a subset of the CORALS sample and supplemented our observations with further measurements published in the literature. In total, we have B-K colors for 42 of the 66 QSOs, of which 14 have intervening DLA systems. To account for redshift-related color changes, the B-K colors are normalized using the Sloan Digital Sky Survey QSO composite.2005AJ....130.1345Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/130/1345CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/130/1345https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/130/1345http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/130/1345https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/130/1345https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/130/1345http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/130/1345GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/130/1345/table2 (CORALS QSO magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/130/1345/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/130/1345/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/130/1345/table2?GETtext/xml+votable180.050000true4.9278139-30.52204170.0055555555555555566/16485 17094 17110 17188 18004 18644 18868 19061 19202 20657 21012 21163 21254 21790 22917 23306 24658 24854 25174 25213 25413 25427 25501 25677 25863 25990 26000 27302 29795 30942 31135 31176 31383 34044 34210 34568 34675 34691 35522 35764 35769 35849 36130 36151 36230 36346 36655 38477 38639 38744 39566 40060 40527 43628 44000 44310 44555 44658 46529 46542 46577 46921 47001 47016 47941 48610https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/130/1345?format=asciiOpticaldefaultJ/AJ/130/1345/table2CORALS QSO magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_QSOnear-simultaneous (B-K) colors available in table3meta.ref.urlcharQSOThe QSO namemeta.id;meta.maincharprimaryzRedshift from emission linessrc.redshiftfloatBjmag? The UKST B_j_ magnitudemagphot.mag;em.opt.BfloatnullableBmag? The B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? Error in Bmagmagstat.error;phot.mag;em.opt.BfloatnullableVmag? The V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? Error in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableKsmag? The K_s_ band magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? Error in Ksmagmagstat.error;phot.mag;em.IR.KfloatnullableRefPhotometry reference (1)meta.bibcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_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/AJ/130/1345/table3Normalized colors and intervening absorber properties for CORALS QSOs with near-simultaneous B-K colorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQSOQSO namemeta.id;meta.maincharzem? Redshift from emission linessrc.redshiftfloatnullablezabs? Absorption redshiftsrc.redshiftfloatnullableN(HI)? HI column densitylog(cm**-2)phys.columnDensityfloatnullableB-K? Normalized (B-K) color indexmagphot.color;em.opt.B;em.IR.Kfloatnullablee_B-K? Error in B-Kmagstat.error;phot.color;em.opt.Bfloatnullablel_[Zn/H]Upper limit flag on [Zn/H]meta.code.error;phys.abundchar[Zn/H]? [Zn/H] abundancelog(Sun)phys.abundfloatnullable[Fe/H]? [Fe/H] abundancelog(Sun)phys.abund.FefloatnullableRef? Abundance origin (1)meta.bibintnullable