J/ApJ/929/108ivo://CDS.VizieR/J/ApJ/929/108doi:10.26093/cds/vizier.19290108CDSGupta N.Shukla G.Srianand R.Krogager J.-K.Noterdaeme P.,Baker A.J.Combes F.Fynbo J.P.U.Momjian E.Hilton M.Hussain T.,Moodley K.Petitjean P.Chen H.-W.Deka P.Dutta R.Jose J.,Jozsa G.I.G.Kaski C.Klockner H.-R.Knowles K.Sikhosana S.,Wagenveld J.2026-02-10T20:05:22Z2024-04-10T07:57:31ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsvisible-astronomyspectroscopyredshiftedradio-sourcesinfrared-photometrybroad-band-photometryastronomical-object-identificationsurveysWe present results of an optical spectroscopic survey using SALT and the Nordic Optical Telescope to build a Wide-field Infrared Survey Explorer mid-infrared color-based, dust-unbiased sample of powerful radio-bright (>200mJy at 1.4GHz) active galactic nuclei (AGN) for the MeerKAT Absorption Line Survey (MALS). Our sample has 250 AGN (median z=1.8) showing emission lines, 26 with no emission lines, and 27 without optical counterparts. Overall, our sample is fainter ({Delta}i=0.6mag) and redder ({Delta}(g-i)=0.2mag) than radio-selected quasars, and representative of fainter quasar population detected in optical surveys. About 20% of the sources are narrow-line AGN (NLAGN)-65% of these, at z<0.5 are galaxies without strong nuclear emission, and 10% at z>1.9, have emission line ratios similar to radio galaxies. The farthest NLAGN in our sample is M1513-2524 (z_em_=3.132), and the largest radio source (size ~330kpc) is M0909-3133 (z_em_=0.884). We discuss in detail 110 AGN at 1.9<z<3.5. Despite representing the radio loudest quasars (median R=3685), their Eddington ratios are similar to the Sloan Digital Sky Survey quasars having lower R. We detect four CIV broad-absorption line (BAL) QSOs, all among AGN with least R, and highest black hole masses and Eddington ratios. The BAL detection rate (4_-2_^+3^%) is consistent with that seen in extremely powerful (L_1.4GHz_>10^25^W/Hz) quasars. Using optical light curves, radio polarization, and {gamma}-ray detections, we identify seven high-probability BL Lacertae objects. We also summarize the full MALS footprint to search for HI 21cm and OH 18cm lines at z<2.2022ApJ...929..108Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/929/108CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)VIII/81 : Sydney University Molonglo Sky Survey (SUMSS V2.1) (Mauch+ 2008)II/328 : AllWISE Data Release (Cutri+ 2013)J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/ApJ/666/806 : SED of Spitzer quasars (QUEST) (Netzer+, 2007)J/ApJ/658/815 : Radio loudness of active galactic nuclei (Sikora+, 2007)J/A+A/495/691 : Multifreq. catalogue of blazars, Roma-BZCAT (Massaro+, 2009)J/A+A/505/1087 : DLAs in SDSS-DR7 (Noterdaeme+, 2009)J/ApJ/702/1230 : Rotation measure image of the sky (Taylor+, 2009)J/ApJ/713/970 : Low-resolution SED templates for AGNs & gal. (Assef+, 2010)J/ApJ/708/427 : Type 2 AGNs with double-peaked [OIII] lines (Liu+, 2010)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJS/218/23 : Fermi LAT third source catalog (3FGL) (Acero+, 2015)J/A+A/598/A17 : The 2WHSP catalog (Chang+, 2017)J/ApJS/234/23 : The WISE AGN candidates catalogs (Assef+, 2018)J/ApJS/242/4 : Two new catalogs of blazar candidates (D'Abrusco+, 2019)J/ApJ/922/179 : Host galaxies phot. for WISE-selected AGNs (Barrows+, 2021)J/A+A/648/A116 : PKS 1830-211 OH and HI spectra (Combes+, 2021)J/ApJS/255/28 : ~420MHz uGMRT obs. of MIR radio-loud AGN (Gupta+, 2021)J/A+A/673/A113 : MALS ten pointings continuum catalogue (Wagenveld+ 2023)J/ApJS/270/33 : MALS DR1 v2 (Deka+ 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/929/108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/929/108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/929/108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/929/108https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/929/108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/929/108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/929/108/table1 (*radio sources for the uGMRT survey)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/929/108/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/929/108/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/929/108/table1?GETtext/xml+votable180.050000true0.6439997-5.39002270.0055555555555555566/30 38 72 141 154 172 306 355 569 572 620 4245 4370 4417 8229 8253 8262 8321 12414 12603 16494 16629 16768 16820 17109 17146 17217 17224 17263 17283 17306 17353 17359 17388 17411 17545 17606 17644 17652 17925 18135 18229 18437 18458 18462 18479 18520 18708 18761 18819 18906 18914 19067 19205 19215 19323 19366 19403 19425 19523 19553 19726 19767 19791 19976 20121 20129 20519 20555 20561 20685 20703 20706 21010 21140 21386 21399 21767 21791 21809 21887 21917 21987 22354 22490 22603 22629 22700 22844 22876 22978 22985 23030 23067 23071 23175 23358 23557 24114 24216 24592 24604 24759 24776 24778 24902 24920 24928 24998 25010 25036 25071 25215 25232 25299 25353 25360 25374 25384 25411 25467 25519 25541 25574 25635 25644 25679 25690 25698 25709 25865 26139 26149 26185 26455 26502 26520 26643 26660 26678 26695 26730 26755 26767 26775 26782 26853 26895 26904 26938 27010 27154 27186 27210 27217 27244 27284 27316 27423 27873 27875 28298 29779 29821 29972 30754 30787 30794 30870 30989 31117 31130 31193 31199 31215 31236 31324 31453 31554 32308 34276 34606 34798 35273 35304 35316 35712 35786 35860 35903 35952 36064 36120 36177 36310 36358 36374 36470 36663 36710 36736 36857 38397 38517 38809 38877 38888 38895 39669 39673 39685 39817 39997 40027 40034 40142 40217 40304 40392 40413 40709 40732 40832 40850 40866 40915 40921 42900 43453 43506 43717 43759 43780 43938 43954 43956-43957 43970 43989 44009 44024 44130 44194 44208 44243 44257 44338 44362 44415 44516 44809 44812 44828 44839 44873 44911 44944 44948 44971 46449 46767 46772 46789 46803 46821 46877 46915 46972 46996 47059 47477 47556 47731 47898 47920 47971 48194 48245 48298 48376 48421 48616 48727 48732 48734 48783 48793 48867 48899 48911 48993 490459.932213363424795e-25 4.670716440110116e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/929/108?format=asciiOpticalInfraredRadiodefaultJ/ApJ/929/108/table1*radio sources for the uGMRT surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeCode (1)meta.codecharNameNVSS catalog identifier (MHHMMSS.ss+DDMMSS.s) (2)meta.id;meta.maincharf_NameFlag on Name (3)meta.codecharFlux[200.4/4093] NVSS 20cm flux densitymJyphot.flux.density;em.radio.750-1500MHzfloatSimbadNameSimbad column added by the CDSmeta.idcharnullableWISEAWISE source identifier (JHHMMSS.ss+DDMMSS.s)meta.id.crosscharPSOPanSTARRS1 identifier (JDDD.dddd+DD.dddd)meta.id.crosscharl_BmajLimit flag on Bmajmeta.code.errorcharBmaj[13.9/50] NVSS deconvolved radio source major axisarcsecphys.angSizefloatl_BminLimit flag on Bminmeta.code.errorcharBmin[13.9/20] NVSS deconvolved radio source minor axisarcsecphys.angSize;srcfloatBPA[-88.6/89.5]? NVSS deconvolved radio source position angledegpos.posAngfloatnullablez[0.1/5.1]? Spectroscopic redshift from SALT-NOT spectrasrc.redshiftfloatnullableTelTelescope use for spectroscopy (4)instr.telcharAGNAGN type (5)meta.code.classcharRAJ2000WISE Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-40.2/20] WISE Declination (J2000)degpos.eq.dec;meta.mainW1mag[13.2/18] WISE 3.4 micron band magnitudemagphot.mag;em.IR.3-4umfloate_W1mag[0.03/0.3] Uncertainty in W1magmagstat.error;phot.magfloatW2mag[12.2/16.8] WISE 4.6 micron band magnitudemagphot.mag;em.IR.4-8umfloate_W2mag[0.02/0.4]? Uncertainty in W2magmagstat.error;phot.magfloatnullableW3mag[8.2/13] WISE 12 micron band magnitudemagphot.flux.density;em.IR.8-15umfloate_W3mag[0.02/0.6]? Uncertainty in W3magmagstat.error;phot.magfloatnullableNsdet[0/67]? Number of stacked detectionsmeta.numberintnullableNdet[0/97]? Number of single epoch detections in all filtersmeta.numberintnullablegmag[18/25.7]? PS1 g band AB magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[0/1.7]? Uncertainty in gmag (6)magstat.error;phot.magfloatnullablermag[17.8/25.2]? PS1 r band AB magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[0/1.2]? Uncertainty in rmag (6)magstat.error;phot.magfloatnullableimag[17.5/23.7]? PS1 i band AB magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[0/0.4]? Uncertainty in imag (6)magstat.error;phot.magfloatnullablezmag[17.4/23.6]? PS1 z band AB magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[0/0.7]? Uncertainty in zmag (6)magstat.error;phot.magfloatnullableymag[17.4/26]? PS1 y band AB magnitudemagphot.mag;em.IR.Jfloatnullablee_ymag[0/10]? Uncertainty in ymag (6)magstat.error;phot.magfloatnullableDR1v2Display data from MALS DR1 (Deka+ 2024, J/ApJS/270/33) within 3"meta.ref.urlintnullable