J/ApJ/607/60ivo://CDS.VizieR/J/ApJ/607/60doi:10.26093/cds/vizier.16070060CDSGlikman E.Gregg M.D.Lacy M.Helfand D.J.Becker R.H.White R.L.2006-04-22T06:35:36Z2006-04-22T06:33:01ZCDS support team

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

cds-question@unistra.frquasarsinfrared-sourcesradio-sourcesinfrared-photometryWe have constructed a sample of bright near-infrared sources that are detected at radio wavelengths but undetected on the first-generation Palomar Observatory Sky Survey (POSSI) plates in order to search for a population of dust-obscured quasars. Optical and infrared spectroscopic follow-up of the sample has led to the discovery of 17 heavily reddened quasars (B-K>6.5), 14 of which are reported here for the first time. This has allowed us to define a region in the R-K, J-K color plane in which 50% of the radio-selected objects are highly reddened quasars. We compare the surface density of this previously overlooked population to that of ultraviolet-excess radio-selected quasars, finding that they make up ~20% of the total quasar population for K<~15.5.2004ApJ...607...60Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/607/60CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/271 : The Guide Star Catalog, Version 2.2 (GSC2.2) (STScI, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/607/60https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/607/60http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/607/60https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/607/60https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/607/60http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/607/60GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/607/60/table2 (Optically faint FIRST-2MASS red quasar candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/607/60/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/607/60/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/607/60/table2?GETtext/xml+votable180.050000true0.1062917-9.96472220.0055555555555555566/4306 4368 4415 4438 4448 4456 4484 4495 4678 4837 4864 5098 5106 5255 5632 5858 5972 6149 6156 6197 6200 6420 6609 6769 6928 7220 8909 8920 9070 9116 9606 9759 10356 10448 10624 10743 16894 16895 17215 17295 17500 17514 17559 17572 17575 17661 17703 17705 17709 17710 17712 18002 18005 19028 26178 26984 27235 27573 27577 27890 27893 28004 28044 28069 28139 28290 28465 367898.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/607/60?format=asciiInfraredRadiodefaultJ/ApJ/607/60/table2Optically faint FIRST-2MASS red quasar candidatesRef[1/3]? Reference (3)meta.bibintnullablen_Ref[bd] Note on Ref (4)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000.0) from FIRST catalogpos.eq.ra;meta.mainDEJ2000Declination (J2000.0) from FIRST catalogpos.eq.dec;meta.mainNote[c] Individual note (1)meta.notecharl_BmagLimit flag on Bmagmeta.code.error;phot.mag;em.opt.BcharBmagGCS2 B magnitudemagphot.mag;em.opt.Bfloatl_RmagLimit flag on Rmagmeta.code.error;phot.mag;em.opt.RcharRmagGCS2 R magnitudemagphot.mag;em.opt.RfloatJmag2MASS J magnitudemagphot.mag;em.IR.JfloatHmag2MASS H magnitudemagphot.mag;em.IR.HfloatKsmag2MASS Ks magnitudemagphot.mag;em.IR.KfloatFpeakFIRST 20cm peak flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatFintFIRST 20cm integrated flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatJ-KJ-K colour indexmagphot.color;em.IR.J;em.IR.Kfloatl_R-KLimit flag on R-Kmeta.code.error;phot.color;em.opt.RcharR-KR-K colour index (R magnitude from GSC 2)magphot.color;em.opt.R;em.IR.Kfloatz? Redshiftsrc.redshiftfloatnullablen_z[e] Note on z (2)meta.notecharTypeType of objectsrc.classchar2MASSDisplay the 2MASS datameta.ref.urlcharFIRSTDisplay the FIRST datameta.ref.urlcharGSC2.2Display the GSC2.2 datameta.ref.urlchar