J/ApJ/698/1095ivo://CDS.VizieR/J/ApJ/698/1095doi:10.26093/cds/vizier.16981095CDSUrrutia T.Becker R.H.White R.L.Glikman E.Lacy M.Hodge J.,Gregg M.D.2017-11-06T12:23:17Z2011-07-19T10:02:37ZCDS support team

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

cds-question@unistra.frsurveysredshiftedquasarsvisible-astronomysloan-photometryradio-sourcesphotometryinfrared-sourcesWe present results on a survey to find extremely dust-reddened Type 1 quasars. Combining the FIRST radio survey, the 2MASS Infrared Survey and the Sloan Digital Sky Survey, we have selected a candidate list of 122 potential red quasars. With more than 80% spectroscopically identified objects, well over 50% are classified as dust-reddened Type 1 quasars, whose reddenings (E(B-V)) range from approximately 0.1 to 1.5mag. They lie well off the color selection windows usually used to detect quasars and many fall within the stellar locus, which would have made it impossible to find these objects with traditional color selection techniques. The reddenings found are much more consistent with obscuration happening in the host galaxy rather than stemming from the dust torus. We find an unusually high fraction of broad absorption line (BAL) quasars at high redshift, all but one of them belonging to the low-ionization BAL (LoBAL) class and many also showing absorption in the metastable FeII line (FeLoBAL). The discovery of further examples of dust-reddened LoBAL quasars provides more support for the hypothesis that BAL quasars (at least LoBAL quasars) represent an early stage in the lifetime of the quasar. The fact that we see such a high fraction of BALs could indicate that the quasar is in a young phase in which quasar feedback from the BAL winds is suppressing star formation in the host galaxy.2009ApJ...698.1095Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/698/1095CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/258 : Quasars and Active Galactic Nuclei (13th Ed.) (Veron+ 2010)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)VII/240 : Millennium Galaxy Catalogue (Liske+, 2003)VII/204 : Galaxy properties at NGP (Odewahn+ 1995)VIII/53 : The Green Bank Survey (Maslowski+ 1972-87)J/ApJ/667/673 : FIRST-2MASS red quasar survey (Glikman+, 2007)J/AJ/126/63 : Host galaxies of 2MASS-QSOs with z<=3 (Hutchings+, 2003)J/AJ/126/2125 : SDSS candidate type II quasars (Zakamska+, 2003)J/ApJ/569/23 : Optical polarisation of 2MASS QSOs (Smith+, 2002)J/ApJS/135/227 : The FIRST bright quasar survey. III. (Becker+, 2001)J/A+AS/128/153 : Revised GB/GB2 sample of radio sources (Machalski 1998)J/A+AS/109/147 : ROSAT AGN content (Brinkmann+, 1995)J/ApJS/100/1 : Second Caltech-Jodrell Bank VLBI Survey. II. (Henstock+ 1995)J/A+AS/96/389 : Warm IRAS sources. II. (de Grijp+, 1992)J/A+AS/65/267 : A 5-GHz Survey of Radio Sources (Altschuler 1986)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/698/1095https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/698/1095http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/698/1095https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/698/1095https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/698/1095http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/698/1095GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/698/1095/table1 (Properties and identification of red quasar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/698/1095/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/698/1095/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/698/1095/table1?GETtext/xml+votable180.050000true9.249375-1.22563890.0055555555555555566/4495 4497 4758 4803 4886 4908 5092 5098 5218 5255 5299 5379 5412 5518 5765 5972 5986 6075 6078 6192 6197 6249 6409 6420 6541 6559 6571 6600 6609 7220 7257 7482 7563 8194 8204 8241 8252 8357 8400 8658 8769 8818 9060 9070 9189 9202 9269 9337 9364 9377 9443 9606 9799 9899 9929 9956 9964 10130 10221 10260 10337 10448 10508 10536 10624 11078 11221 11342 11409 11845 11915 17294 17301 17328 17514 17805 18065 18865 19028 19048 19053 21878 21975 25585 26010 26111 26208 26274 26331 26396 26407 26603 26984 27307 27311 27523 27577 27885 27904 28031 28092 28172 28290 28295 28321 28356 28479 28550 28560 31372 31408 31431 31440 31454 31522 31656 31658 31665 31684 32459 32508 491049.932213363424795e-25 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/698/1095?format=asciiOpticalInfraredRadiodefaultJ/ApJ/698/1095/table1Properties and identification of red quasar candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_SeqSimbad column added by the CDSmeta.ref.urlcharSeq[1/122] Running sequence number identification (<[UBW2009] NNN> in Simbad)meta.id;meta.mainintprimaryRAJ2000FIRST hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000FIRST degree of declination (J2000)pos.eq.dec;meta.mainF20cmFIRST catalog peak 20cm flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatu'magSDSS-DR5 u' band magnitudemagphot.mag;em.opt.Ufloatg'magSDSS-DR5 g' band magnitudemagphot.mag;em.opt.Bfloatr'magSDSS-DR5 r' band magnitudemagphot.mag;em.opt.Rfloati'magSDSS-DR5 i' band magnitudemagphot.mag;em.opt.IfloatJmag2MASS J band magnitudemagphot.mag;em.IR.JfloatKsmag2MASS Ks band magnitudemagphot.mag;em.IR.Kfloatr'-KsThe r'-Ks color indexmagphot.color;em.IR;em.IRfloatJ-KsThe J-Ks color indexmagphot.color;em.IR.J;em.IR.KfloatSpecObservatory where the spectrum was obtained (1)meta.id;instr.obstycharOTypeSpectroscopic object typepos.parallax.spectcharz? Redshiftsrc.redshiftfloatnullableCommCommentsmeta.notecharRefReferences code; see refs.dat filemeta.codecharDR7+DR5Diplay data from SDSS-DR7 and DR5 quasar catalogsmeta.ref.urlcharFIRSTDiplay data from SDSS-DR7 and DR5 quasar catalogsmeta.ref.urlcharSloanDisplay the SDSS data for this quasarmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246)meta.ref.urlcharJ/ApJ/698/1095/table2Spectral properties of the quasarsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF2MSQuasar identificationmeta.id;meta.maincharSeqSimbad column added by the CDSmeta.idintnullablezRedshiftsrc.redshiftfloatE(B-V)Reddeningmagphot.color.excessfloate_E(B-V)E(B-V) uncertaintymagstat.errorfloatWHb? H{beta} widthkm/sspect.line.width;em.line.Hbetaintnullablef_WHb[*] peculiar H{beta} lines (1)meta.codechare_WHb? WHb uncertaintykm/sstat.errorintnullableiMAGAbsolute i band magnitudemagphys.magAbsfloatJ/ApJ/698/1095/table3Absorption trough properties of quasars with z>0.9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintF2MSQuasar identificationmeta.id;meta.maincharSeqSimbad column added by the CDSmeta.idintnullablezRedshiftsrc.redshiftfloatBaln? MgII line balnicity (see "f_Baln" column)spect.line.eqWidthintnullablef_Baln[a] Baln derived from CIV (1)meta.codecharAbs? MgII line absorption index (see "f_Abs") otherwise flaggedspect.indexintnullablef_Abs[a] Abs derived from CIV (1)meta.codecharChi2? {chi}^2^ fitstat.fit.param;meta.modelleddoublenullableOTypeObject type (2)src.classcharJ/ApJ/698/1095/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefCode referencemeta.ref;pos.framecharBibCodeBibcodemeta.bib.bibcodecharAutAuthor's referencemeta.bib.authorcharNoteVizieR catalog referencemeta.notechar