J/ApJ/842/87ivo://CDS.VizieR/J/ApJ/842/87doi:10.26093/cds/vizier.18420087CDSMao P.Urry C.M.Marchesini E.Landoni M.Massaro F.Ajello M.2018-05-16T06:59:28Z2018-03-06T13:35:35ZCDS support team

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

cds-question@unistra.frquasarsredshiftedradio-sourcesvisible-astronomyspectroscopyWe present the radio luminosity function (LF) of flat-spectrum radio quasars (FSRQ), using the largest and most complete sample to date. Cross-matching between the FIRST 20cm and GB6 6cm radio surveys, we find 638 flat-spectrum radio sources above 220mJy at 1.4GHz; of these, 327 are classified and verified using optical spectroscopy data, mainly from Sloan Digital Sky Survey Data Release 12. We also considered flat-spectrum radio sources that lack both literature references and optical spectroscopy, and we identified 12 out of the 43 such sources to potentially be FSRQs, using their WISE colors. From the fully identified sample of 242 FSRQs, we derived the radio LF and cosmic evolution of blazars at 1.4GHz, finding good agreement with previous work at 5GHz. The number density of FSRQs increases dramatically to a redshift of z~2 and then declines for higher redshifts. Furthermore, the redshift at which the quasar density peaks is clearly dependent on luminosity, with more luminous sources peaking at higher redshifts. The approximate best-fit LF for a luminosity-dependent evolutionary model is a broken power-law with slopes ~0.7 and ~1.7 below and above the break luminosity, logL_1.4_~43.8erg/s, respectively.2017ApJ...842...87Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/842/87CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/5 : Bright Extragalactic Radio Sources (1Jy) (Kuehr+, 1981)VIII/40 : GB6 catalog of radio sources (Gregory+ 1996)VIII/59 : the FIRST Survey, version 1999Jul (White+ 1999)V/139 : The SDSS Photometric Catalog, DR9 (Adelman-McCarthy+, 2012)V/147 : The SDSS Photometric Catalog, DR12 (Alam+, 2015)VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)VII/274 : The Roma BZCAT - 5th edition (Massaro+, 2015)J/A+AS/109/267 : Radio to X-Ray distribution of BL Lac Objects (Giommi+, 1995)J/ApJS/123/79 : Third EGRET catalog (3EG) (Hartman+, 1999)J/A+A/401/927 : The HRX-BL Lac sample (Beckmann+, 2003)J/A+A/445/465 : ATCA 18.5 and 22GHz fluxes of Kuehr 5GHz sample (Ricci+, 2006)J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)J/ApJ/699/603 : Evolution of Swift/BAT blazars (Ajello+, 2009)J/A+A/508/107 : WMAP3 catalogue (Giommi+, 2009)J/ApJ/748/68 : WISE IR colors of gamma-ray blazars (D'Abrusco+, 2012)J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)J/ApJS/206/12 : Blazars with {gamma}-ray counterparts. I. (D'Abrusco+, 2013)J/ApJS/207/4 : Unidentified {gamma}-ray sources. III. Radio (Massaro+, 2013)J/ApJS/209/10 : UGSs. V. kernel approach (Massaro+, 2013)J/ApJS/206/13 : Blazars with {gamma}-ray counterparts. II. (Massaro+, 2013)J/ApJS/215/14 : WISE cand. {gamma}-ray blazar radio sources (D'Abrusco+, 2014)J/ApJS/213/3 : Low-frequency flat spectrum sources (LORCAT) (Massaro+, 2014)J/A+A/588/A141 : The MWA view of Fermi blazars (Giroletti+, 2016)J/ApJS/224/26 : SEDs of Roma BZCAT blazars (Mao+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/842/87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/842/87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/842/87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/842/87https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/842/87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/842/87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/842/87/table3 (Sources with unknown classification predicted to be flat-spectrum radio quasars (FSRQs))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/87/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/87/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/87/table3?GETtext/xml+votable180.050000true112.08541721.8850.005555555555555556Cone search capability for table J/ApJ/842/87/table2 (Complete data for the radio-flux-limited of flat spectrum sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/842/87/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/842/87/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/842/87/table2?GETtext/xml+votable180.050000true7.2655.15970.0055555555555555566/1 47 4260 4352 4353 4436 4446 4448 4525 4572 4579 4627 4674 4825 4837 4850 4977 4992 5001 5009 5139 5163 5170 5303 5305 5345 5453 5458 5482 5546 5574 5589 5657 5658 5676 5766 5767 5773 5781 5801 5803 5807 5817 5847 5848 5864 5867 5999 6035 6153 6167 6170 6219 6245 6268 6368 6399 6422 6448 6469 6479 6496 6498 6503 6529 6543 6576 6633 6641 6747 6751 6934 6948 6962 6984 7030 7181 7195 7200 7222 7245 7248 7343 7346 7446 7689 7709 7776 8215 8343 8367 8466 8491 8536 8660 8729 8773 9075 9076 9158 9220 9232 9248 9258 9284 9352 9442 9460 9512 9568 9570 9612 9633 9636 9714 9813 9906 9961 9976 9978 10006 10060 10112 10163 10186 10250 10283 10352 10422 10426 10466 10524 10545 10561 10633 10681 10705 10798 10803 10836 10932 10935 11006 11009 11024 11039 11094 11099 11118 11176 11177 11407 11438 11514 11523 11594 11825 11829 11833 11845 12400 12551 17791 17857 17877 17914 18155 18158 18214 18242 18271 18868 18875 18907 18914 18927 19061 19101 19127 19162 19178 19190 19197 19217 19223 19287 19307 19332 19370 19493 19500 19601 19615 19617 19618 19620 19622 19629 19750 21873 21886 22388 26003 26007 26036 26083 26097 26301 26340 26362 26417 27096 27133 27310 27322 27417 27433 27436 27440 27466 27509 27559 27583 27595 27689 27715 27857 27897 27909 28050 28067 28167 28208 28269 28370 28383 28479 28517 28583 28589 28628 31334 31355 31391 31430 31444 31451 31520 31523 31529 31535 316649.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/842/87?format=asciiRadioOpticaldefaultJ/ApJ/842/87/table3Sources with unknown classification predicted to be flat-spectrum radio quasars (FSRQs)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFIRSTFIRST identifier (JHHMMSS.s+DDMMSS) (G1)meta.id;meta.maincharz[0.7/1.8] Redshift (1)src.redshiftfloatFint[221/596] Integrated flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzfloatSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from FIRST names (right ascension part)degpos.eq.ra;meta.main_DEPositions from FIRST names (declination part)degpos.eq.dec;meta.mainJ/ApJ/842/87/table2Complete data for the radio-flux-limited of flat spectrum sourcesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFIRSTFIRST identifier (JHHMMSS.s+DDMMSS) (G1)meta.id;meta.maincharGB6GB6 identifier (JHHMM+DDMMA) (1)meta.idcharRAJ2000Right ascension, decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination, decimal degrees (J2000)degpos.eq.dec;meta.mainzspec[0.04/5.3]? Spectroscopic redshiftsrc.redshiftfloatnullableClassSource Classification (2)src.classcharCleanClean identification (3)meta.codecharalpha[-1.2/0.5] SED slopespect.indexfloatFint[220/6599] Integrated flux at 1.4GHzmJyphot.flux.density;em.radio.750-1500MHzdoubleSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar