J/ApJS/267/37ivo://CDS.VizieR/J/ApJS/267/37doi:10.26093/cds/vizier/bb-8b-15CDSGordon Y.A.Rudnick L.Andernach H.Morabito L.K.O'Dea C.P.,Achong K.-M.Baum S.A.Bayona-Figueroa C.Hooper E.J.Mingo B.,Morris M.E.Vantyghem A.N.2026-08-03T07:25:09Z2023-11-30T08:31:25ZCDS support team

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

cds-question@unistra.frradio-galaxiesactive-galactic-nucleiredshiftedgalaxy-radiiinfrared-photometryActive galactic nuclei (AGNs) can often be identified in radio images as two lobes, sometimes connected to a core by a radio jet. This multicomponent morphology unfortunately creates difficulties for source finders, leading to components that are (a) separate parts of a wider whole, and (b) offset from the multiwavelength cross identification of the host galaxy. In this work we define an algorithm, DRAGNhunter, for identifying double radio sources associated with AGNs (DRAGNs) from component catalog data in the first epoch Quick Look images of the high-resolution (~3" beam size) Very Large Array Sky Survey (VLASS). We use DRAGNhunter to construct a catalog of >17000 DRAGNs in VLASS for which contamination from spurious sources is estimated at ~11%. A "high-fidelity" sample consisting of 90% of our catalog is identified for which contamination is <3%. Host galaxies are found for ~13000 DRAGNs as well as for an additional 234,000 single-component radio sources. Using these data, we explore the properties of our DRAGNs, finding them to be typically consistent with Fanaroff-Riley class II sources and to allow us to report the discovery of 31 new giant radio galaxies identified using VLASS.2023ApJS..267...37Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/267/37CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)VII/249 : 6dF-DR2 Galaxy Survey (Jones+, 2005)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)II/311 : WISE All-Sky Data Release (Cutri+ 2012)VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)II/328 : AllWISE Data Release (Cutri+ 2013)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)VII/292 : DESI Legacy Imaging Surveys DR8 (Duncan, 2022)J/A+A/374/861 : Positions of giant radio galaxies (Schoenmakers+ 2001)J/ApJ/586/794 : Multiwavelength luminosities of galaxies (Bell, 2003)J/AJ/128/1974 : The VLA-COSMOS survey (Schinnerer+, 2004)J/MNRAS/362/9 : Radio-loud AGN in SDSS (Best+, 2005)J/MNRAS/381/211 : Radio galaxies in the 2SLAQ LRG Survey (Sadler+, 2007)J/ApJS/172/46 : VLA-COSMOS survey. II. (Schinnerer+, 2007)J/MNRAS/401/1429 : WiggleZ dark energy survey (DR1) (Drinkwater+, 2010)J/MNRAS/413/971 : Galaxy And Mass Assembly (GAMA) DR1 (Driver+, 2011)J/ApJS/194/31 : Morphology for groups in FIRST database (Proctor, 2011)J/MNRAS/421/1569 : Properties of 18286 SDSS radio galaxies (Best+, 2012)J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)J/MNRAS/438/1149 : Radio-loud AGN complete samples with WISE (Gurkan+, 2014)J/MNRAS/462/1910 : H-ATLAS NGP LOFAR radio catalogue (Hardcastle+, 2016)J/MNRAS/464/1306 : LARGESS survey (Ching+, 2017)J/A+A/598/A104 : LOFAR Two-metre Sky Survey (Shimwell+, 2017)J/A+A/602/A1 : VLA-COSMOS 3 GHz Large Project (Smolcic+, 2017)J/MNRAS/474/3875 : Galaxy And Mass Assembly (GAMA): DR3 (Baldry+, 2018)J/MNRAS/474/4151 : WiggleZ Dark Energy Survey final DR (Drinkwater+, 2018)J/ApJS/238/9 : Cat. of giant radio sources known to date (Kuzmicz+, 2018)J/AJ/157/126 : Distortion of radio gal. by galaxy clusters (Garon+, 2019)J/MNRAS/485/2710 : Radio jets associated with gal. outflows (Jarvis+, 2019)J/A+A/622/A1 : LOFAR Two-metre Sky Survey DR1 sources (Shimwell+, 2019)J/A+A/642/A153 : SAGAN. I. Multi-wavelength studies (Dabhade+, 2020)J/A+A/635/A5 : LoTSS giant radio galaxies. I. (Dabhade+, 2020)J/ApJS/247/53 : ROGUE. I. SDSS gal. with FIRST (Koziel-Wierzbowska+, 2020)J/other/Galax/9.99 : Giant Radio Galaxies in RACS (Andernach+, 2021)J/ApJS/255/30 : VLASS QL Ep.1 Catalog, CIRADA version (Gordon+, 2021)J/other/PASA/38.58 : Rapid ASKAP Continuum Survey. II. RACS cat. (Hale+, 2021)J/ApJS/253/25 : Giant radio QSOs from SDSS, FIRST & NVSS (Kuzmicz+, 2021)J/A+A/648/A102 : FR-type radio sources at 3GHz (Vardoulaki+, 2021)J/A+A/659/A1 : LOFAR Two-metre Sky Survey (LoTSS) DR2 (Shimwell+, 2022)J/A+A/672/A163 : Properties of the 2060 giant radio galaxies (Oei+, 2023)http://science.nrao.edu/vlass : VLA Sky Survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/267/37https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/267/37http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/267/37https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/267/37https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/267/37http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/267/37GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/267/37/table6 (Double radio sources associated with AGN (DRAGN) properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/267/37/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/267/37/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/267/37/table6?GETtext/xml+votable180.050000true0.012099.951810.005555555555555556Cone search capability for table J/ApJS/267/37/table2 (Newly discovered giant radio galaxies in Very Large Array Sky Survey (VLASS) identified by DRAGNhunter)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/267/37/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/267/37/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/267/37/table2?GETtext/xml+votable180.050000true6.2785-34.44577780.005555555555555556Cone search capability for table J/ApJS/267/37/table3 (Results of the visual inspection of triple sources identified by DRAGNhunter)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/267/37/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/267/37/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/267/37/table3?GETtext/xml+votable180.050000true0.2723333-16.99452780.005555555555555556Cone search capability for table J/ApJS/267/37/table5 (Source and host information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/267/37/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/267/37/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/267/37/table5?GETtext/xml+votable180.050000true0.0004288919.04440.0055555555555555560/1 3 1/1-3 8-10 17 19 23 26-27 29-31 2/0-2 44-46 65-67 72-73 75 81-83 86-88 90-91 98-101 103 114-115 141-143 157-159 174-175 189-191 3/12-13 15 189-191 258-259 296-298 322-323 337-341 343 357-359 385-388 390-391 409-411 449-453 455 541-543 557-559 561-563 605-607 621-623 625-626 669-671 685-687 689-694 734-735 749-751 753-755 4/57-59 753-755 1025-1030 1196-1198 1281-1284 1286-1287 1344-1346 1369-1371 1424-1426 1537-1539 1556-1557 1559 1632 1634-1635 1793-1795 1816 1818-1819 2141-2143 2157-2159 2161-2163 2205-2207 2221-2223 2225-2227 2241-2243 2397-2399 2413-2415 2417-2419 2461-2463 2477-2479 2481-2483 2497-2499 2508 2510-2511 2653-2655 2669-2671 2673-2675 2717-2719 2733-2735 2737-2739 2753-2755 2781-2783 2909-2911 2925-2927 2930-2932 2934-2935 2973-2975 2989-2991 2993-2995 3009-3011 5/224-226 3008-3010 4097-4099 4124 4126 4796 4798-4799 5121-5123 5140 5142-5143 5388-5390 5473-5475 5709-5711 6145-6147 6232-6233 6235 6533-6535 7169-7171 7269-7271 8541-8543 8557-8559 8561-8563 8605-8607 8621-8623 8625-8627 8641-8643 8797-8799 8813-8815 8817-8819 8861-8863 8877-8879 8881-8883 8897-8899 8961-8963 9565-9567 9581-9583 9585-9587 9629-9631 9645-9647 9649-9651 9665-9667 9821-9823 9837-9839 9841-9843 9885-9887 9901-9903 9905-9907 9921-9923 9985-9987 10036-10037 10039 10589-10591 10605-10607 10609-10611 10653-10655 10669-10671 10673-10675 10689-10691 10845-10847 10861-10863 10865-10867 10909-10911 10925-10927 10929-10931 10945-10947 11009-11011 11120 11122 11613-11615 11629-11631 11633-11635 11677-11679 11693-11695 11697-11699 11713-11716 11718-11719 11732-11734 11869-11871 11885-11887 11889-11891 11933-11935 11949-11951 11953-11955 11969-11971 12033-12035 6/908 910-911 12044-12046 16385-16387 16500-16502 16508 16510-16511 19188-19189 19191 20481-20483 20565-20567 21565-21567 21888 21890-21891 22832-22834 24577-24579 24937-24939 26128-26130 28673-28675 29073-29075 34141 34143 34157-34159 34161-34163 34205-34207 34221-34223 34225-34227 34241-34243 34397-34399 34413-34415 34417-34419 34461-34463 34477-34479 34481-34483 34497-34499 34561-34563 35165-35167 35181-35183 35185-35187 35229-35231 35245-35247 35249-35251 35265-35267 35422-35423 35437-35439 35441-35443 35485-35487 35501-35503 35505-35507 35521-35523 35585-35587 35842-35843 38237-38239 38253-38255 38257-38259 38301-38303 38317-38319 38321-38323 38337-38339 38493-38495 38510-38511 38513-38515 38557-38559 38573-38575 38577-38579 38593-38595 38657-38659 39261-39263 39277-39279 39281 39283 39325-39327 39341-39343 39345-39347 39361-39363 39518-39519 39533-39535 39537-39539 39581-39583 39598-39599 39601-39603 39617-39619 39681-39683 39937-39939 40153-40155 42333-42335 42349-42351 42353-42355 42397-42399 42413-42415 42417-42419 42434-42435 42589-42591 42605-42607 42609-42611 42653-42655 42669-42671 42673-42675 42689-42691 42753-42755 43357 43359 43373-43375 43377-43379 43421-43423 43437-43439 43441-43443 43457-43459 43615 43629-43631 43633 43635 43677 43679 43693-43695 43697-43699 43715 43777-43779 44034-44035 44484-44486 44493-44495 46429-46431 46445 46447 46449-46451 46493-46495 46509-46511 46513-46515 46529-46531 46685-46687 46701-46703 46705-46707 46749-46751 46765-46767 46769-46771 46786-46787 46849-46851 46869-46871 46940-46941 46943 47453-47455 47469-47471 47473-47475 47517-47519 47533-47535 47537-47539 47553-47555 47709-47711 47725-47727 47729-47731 47773-47775 47789-47791 47793-47795 47810-47811 47873-47875 48129-481318.157980699529898e-21 6.513807192489934e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/267/37?format=asciiInfraredRadiodefaultJ/ApJS/267/37/table6Double radio sources associated with AGN (DRAGN) propertiesNamePosition-based (JHHMMSS.ss+DDMMSS.s)meta.id.parentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadSimbad column added by the CDSmeta.ref.urlcharRAJ2000DRAGN best Right Ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-40.1/90] DRAGN best Declination (J2000)degpos.eq.dec;meta.mainindexedFlux[2.7/8747] Total flux density of the radio source (G1)mJyphot.flux.density;em.radio.1500-3000MHzdoublee_Flux[0.3/88] Uncertainty in FluxmJystat.error;phot.fluxfloatCoreProm[4e-5/0.99]? Fraction of Flux from Corephot.flux;arith.ratiodoublenullablee_CoreProm[1e-5/0.09]? Uncertainty in CorePromstat.errordoublenullableLobe1/Lobe2[0.003/353] Flux ratio of Lobe-1/Lobe-2meta.id.assocdoublee_Lobe1/Lobe2[0.0007/108] Uncertainty in Lobe1/Lobe2stat.errordoubleLAS[7/238] Largest angular extentarcsecphys.angSize;stat.maxfloate_LAS[0.01/5] Uncertainty in LASarcsecstat.errorfloatMisalign1[0/90] Relative misalignment of Lobe-1 (1)degpos.posAngfloate_Misalign1[0.02/180] Uncertainty in Misalign1degstat.errorfloatMisalign2[0/90] Relative misalignment of Lobe-2 (1)degpos.posAngfloate_Misalign2[0.05/180] Uncertainty in Misalign2degstat.errorfloatAvgMisalign[0.08/89.5] Mean misalignment of lobesdegpos.posAngfloate_AvgMisalign[0.1/255] Uncertainty in MeanMisaligndegstat.errorfloatLobe1Component name of Lobe1meta.id.assoccharLobe2Component name of Lobe2meta.id.assoccharCoreComponent name of Coremeta.id;meta.maincharRACdeg? Core R.A. (J2000)degpos.eq.ranullableDECdeg? Core Decl. (J2000)degpos.eq.decnullableRALdegLobes median R.A. (J2000)degpos.eq.raDELdegLobes median Decl. (J2000)degpos.eq.decRAFdegFlux weighted central R.A. (J2000) of lobesdegpos.eq.raDEFdegFlux weighted central Decl. (J2000) of lobesdegpos.eq.decQ[0/1] Source quality flag (>0 is suspect) (G2)meta.code.qualintWISEAAllWISE Host IDmeta.id.parentcharSepWISEA[0.005/24]? Angular separation between radio source and AllWISE hostarcsecpos.angDistancefloatnullableLR[1.8/241322]? Likelihood ratio of the host ID matchstat.likelihood;arith.ratiodoublenullableRel[2e-5/1.01]? Probability the host ID is correctstat.fit.goodnessdoublenullableQHost[-2/1]? Host ID flag (>0 is suspect) (G3)meta.code.qualintnullableTDisplay results of the visual inspection for this source (linked to Table 3)meta.ref.urlintnullableNNewly discovered giant radio galaxy (linked to Table 2)meta.ref.urlintnullableJ/ApJS/267/37/table2Newly discovered giant radio galaxies in Very Large Array Sky Survey (VLASS) identified by DRAGNhunterNamePosition-based name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharLLS[700/1428] Projected largest linear sizekpcphys.size;stat.maxint_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlux[23.3/353.5] Flux density (1)mJyphot.flux.density;em.radio.1500-3000MHzfloatLAS[86/169] Largest angular sizearcsecphys.angSize;stat.maxintz[0.516/1.491] Redshiftsrc.redshiftfloatf_zRedshift type ("spec" or "photo")meta.codecharlogL3GHz[25.53/27.38] log of 3GHz luminosityW/Hzphys.luminosity;em.radio.3-6GHzfloatJ/ApJS/267/37/table3Results of the visual inspection of triple sources identified by DRAGNhunterNamePosition-based (JHHMMSS.ss+DDMMSS.s) name of the triple sourcemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFlag[0/1] Artifact Flag: 0=passed visual inspect; 1=artifactmeta.code.errorint_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.mainJ/ApJS/267/37/table5Source and host informationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCat"VLASS1QLCIR" or nothing (1)meta.id.part;meta.maincharNamePosition-based (JHHMMSS.ss+DDMMSS.s) name (1)meta.id;meta.maincharprimaryRAJ2000Radio source right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Radio source declination (J2000)degpos.eq.dec;meta.mainindexedFlux[0.02/10055] Total flux density of the radio source (G1)mJyphot.flux.density;em.radio.1500-3000MHzdoublee_Flux[0.005/105] Uncertainty in FluxmJystat.error;phot.fluxfloatLAS[0/238] Largest angular extentarcsecphys.angSize;stat.maxfloate_LAS[0/5] Uncertainty in LASarcsecstat.errorfloatTypeIs the source a DRAGN (D) or single-component (S) source?meta.codecharQ[0/1] Source quality flag (>0 is suspect) (G2)meta.code.qualintWISEAAllWISE Host IDmeta.id.parentcharRAAdeg? Host AllWISE right ascension (J2000)degpos.eq.ranullableDEAdeg? Host AllWISE declination (J2000)degpos.eq.decnullableSepWISEA[0.002/24]? Angular separation between radio source and AllWISE hostarcsecpos.angDistancefloatnullableLR[1.8/241322]? Likelihood ratio of the host ID matchstat.likelihood;arith.ratiodoublenullableRel[2e-5/1.01]? Probability the host ID is correctstat.fit.goodnessdoublenullableQHost[-2/1]? Host ID flag (>0 is suspect) (G3)meta.code.qualintnullableW1mag[3.9/19]? Vega magnitude in WISE W1 bandmagphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.008/0.3]? Uncertainty in W1magmagstat.error;phot.magfloatnullableW2mag[0/18.4]? Vega magnitude in WISE W2 bandmagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0/0.6]? Uncertainty in W2magmagstat.error;phot.magfloatnullableW3mag[-6.3/14]? Vega magnitude in WISE W3 bandmagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag[0/0.6]? Uncertainty in W3magmagstat.error;phot.magfloatnullableW4mag[-5.7/10.4]? Vega magnitude in WISE W4 bandmagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag[0/0.6]? Uncertainty in W4magmagstat.error;phot.magfloatnullablez[-0.06/7.02]? Host redshiftsrc.redshiftdoublenullablee_z[-6/937]? Uncertainty in zstat.error;src.redshiftdoublenullablef_zRedshift type (spec/photo)meta.codecharr_zSurvey redshift was obtained from (2)meta.ref;pos.framecharDRAGNDisplay data for this identified DRAGN (linked to Table 6)meta.ref.urlintnullable