J/MNRAS/430/2464ivo://CDS.VizieR/J/MNRAS/430/2464doi:10.26093/cds/vizier.74302464CDSMarcha M.J.M.Caccianiga A.2024-07-21T20:14:09Z2014-05-23T13:51:50ZCDS support team

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

cds-question@unistra.frradio-sourcesbl-lacertae-objectsredshiftedThis paper presents a new sample of BL Lac objects selected from a deep (30mJy) radio survey of flat spectrum radio sources (the CLASS blazar survey). The sample is one of the largest well-defined samples in the low-power regime with a total of 130 sources of which 55 satisfy the 'classical' optical BL Lac selection criteria, and the rest have indistinguishable radio properties. The primary goal of this study is to establish the radio luminosity function (RLF) on firm statistical ground at low radio luminosities where previous samples have not been able to investigate. The gain of taking a peek at lower powers is the possibility to search for the flattening of the luminosity function which is a feature predicted by the beaming model but which has remained elusive to observational confirmation. In this study, we extend for the first time the BL Lac RLF down to very low radio powers ~10^22^W/Hz, i.e. two orders of magnitude below the RLF currently available in the literature. In the process, we confirm the importance of adopting a broader, and more physically meaningful set of classification criteria to avoid the systematic missing of low-luminosity BL Lacs. Thanks to the good statistics we confirm the existence of weak but significant positive cosmological evolution for the BL Lac population, and we detect, for the first time the flattening of the RLF at L~10^25^W/Hz in agreement with the predictions of the beaming model.2013MNRAS.430.2464Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/430/2464CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/40 : GB6 catalog of radio sources (Gregory+ 1996)VIII/72 : CLASS survey of radio sources (Myers+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/430/2464https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/430/2464http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/430/2464https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/430/2464https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/430/2464http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/430/2464GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/430/2464/tablea1 (Table containing the sources used in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/430/2464/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/430/2464/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/430/2464/tablea1?GETtext/xml+votable180.050000true24.13512539.09983330.0055555555555555566/999 2295 2365 5413 5423 5432 5483 5510 5521 5528 5539 5546 5552 5567 5569 5680 5723 5800 5838 5855 5894 5906 5918 5958 5980 6014-6015 6018 6021 6044 6067 6088 6099 6110 6124 6127 6362 6381 6477 6483 6526 6647 6922 6962 6979 7105 7124 7192 7198 7235 7261 7285 7311 7351 7354 7448 7518 7548 7570 7644 7699 7740 7896 7958 9501 9553 9566 9575 9612 9618 9657 9664 9711 9727 9764 9812 9892 9991 10033 10071 10087 10103 10182-10183 10198 10207 10367 10463 10491 10637-10638 10691 10715 10793 10800 10835 10843 10867-10868 10877 10921 10938 10959 11001 11153 11191 11212 11242 11430 11522 11556 11639 11649 11682 11689 11734 11736 11931 11936 12037 12164 13609 15059 15279 15306 15326 16022 16059 286333.313034785154005e-24 3.313034785154005e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/430/2464?format=asciiRadiodefaultJ/MNRAS/430/2464/tablea1Table containing the sources used in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGB6GB6 name (JHHMMSS+DDMMSS)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainz[0/1.4]? Redshiftsrc.redshiftfloatnullableS5GHz[30/2122] Radio flux at 5GHzmJyphot.flux.density;em.radio.3-6GHzintRmagR-band magnitudemagphot.mag;em.opt.RfloatalphaRadio spectral index, {alpha}^4.8^_1.4_spect.indexfloatClassClassifications (1)src.classcharCLASSDisplay the CLASS data (Myers et al. 2003, (Cat. VIII/72)meta.ref.urlchar