J/A+A/674/A41ivo://CDS.VizieR/J/A+A/674/A41doi:10.26093/cds/vizier.36740041CDSGaia CollaborationBailer-Jones C.A.L.Teyssier D.Delchambre L.,Ducourant C.Garabato D.Hatzidimitriou D.Klioner S.A.Rimoldini L.,Bellas-Velidis I.Carballo R.Carnerero M.I.Diener C.Fouesneau M.,Galluccio L.Gavras P.Krone-Martins A.Raiteri C.M.Teixeira R.,Brown A.G.A.Vallenari A.Prusti T.de Bruijne J.H.J.Arenou F.,Babusiaux C.Biermann M.Creevey O.L.Evans D.W.Eyer L.Guerra R.,Hutton A.Jordi C.Lammers U.L.Lindegren L.Luri X.Mignard F.,Panem C.Pourbaix D.Randich S.Sartoretti P.Soubiran C.Tanga P.,Walton N.A.Bastian U.Drimmel R.Jansen F.Katz D.Lattanzi M.G.,van Leeuwen F.Bakker J.Cacciari C.Castaneda J.De Angeli F.,Fabricius C.Fremat Y.Guerrier A.Heiter U.Masana E.Messineo R.,Mowlavi N.Nicolas C.Nienartowicz K.Pailler F.Panuzzo P.,Riclet F.Roux W.Seabroke G.M.Sordo R.Thevenin F.Gracia-Abril G.,Portell J.Altmann M.Andrae R.Audard M.Benson K.Berthier J.,Blomme R.Burgess P.W.Busonero D.Busso G.Canovas H.Carry B.,Cellino A.Cheek N.Clementini G.Damerdji Y.Davidson M.,de Teodoro P.Nunez Campos M.Dell'Oro A.Esquej P.,Fernandez-Hernandez J.Fraile E.Garcia-Lario P.Gosset E.Haigron R.,Halbwachs J.-L.Hambly N.C.Harrison D.L.Hernandez J.Hestroffer D.,Hodgkin S.T.Holl B.Janssen K.Jevardat de Fombelle G.Jordan S.,Lanzafame A.C.Loffler W.Marchal O.Marrese P.M.Moitinho A.,Muinonen K.Osborne P.Pancino E.Pauwels T.Recio-Blanco A.,Reyle C.Riello M.Roegiers T.Rybizki J.Sarro L.M.Siopis C.,Smith M.Sozzetti A.Utrilla E.van Leeuwen M.Abbas U.Abraham P.,Abreu Aramburu A.Aerts C.Aguado J.J.Ajaj M.Aldea-Montero F.,Altavilla G.Alvarez M.A.Alves J.Anderson R.I.Anglada Varela E.,Antoja T.Baines D.Baker S.G.Balaguer-Nunez L.Balbinot E.,Balog Z.Barache C.Barbato D.Barros M.Barstow M.A.Bartolome S.,Bassilana J.-L.Bauchet N.Becciani U.Bellazzini M.Berihuete A.,Bernet M.Bertone S.Bianchi L.Binnenfeld A.Blanco-Cuaresma S.,Boch T.Bombrun A.Bossini D.Bouquillon S.Bragaglia A.Bramante L.,Breedt E.Bressan A.Brouillet N.Brugaletta E.Bucciarelli B.,Burlacu A.Butkevich A.G.Buzzi R.Caffau E.Cancelliere R.,Cantat-Gaudin T.Carlucci T.Carrasco J.M.Casamiquela L.,Castellani M.Castro-Ginard A.Chaoul L.Charlot P.Chemin L.,Chiaramida V.Chiavassa A.Chornay N.Comoretto G.Contursi G.,Cooper W.J.Cornez T.Cowell S.Crifo F.Cropper M.Crosta M.,Crowley C.Dafonte C.Dapergolas A.David P.de Laverny P.,De Luise F.De March R.De Ridder J.de Souza R.de Torres A.,del Peloso E.F.del Pozo E.Delbo M.Delgado A.Delisle J.-B.,Demouchy C.Dharmawardena T.E.Diakite S.Distefano E.Dolding C.,Enke H.Fabre C.Fabrizio M.Faigler S.Fedorets G.Fernique P.,Figueras F.Fournier Y.Fouron C.Fragkoudi F.Gai M.,Garcia-Gutierrez A.Garcia-Reinaldos M.Garcia-Torres M.Garofalo A.,Gavel A.Gerlach E.Geyer R.Giacobbe P.Gilmore G.Girona S.,Giuffrida G.Gomel R.Gomez A.Gonzalez-Nunez J.,Gonzalez-Santamaria I.Gonzalez-Vidal J.J.Granvik M.Guillout P.,Guiraud J.Gutierrez-Sanchez R.Guy L.P.Hauser M.Haywood M.,Helmer A.Helmi A.Sarmiento M.H.Hidalgo S.L.Hilger T.Hladczuk N.,Hobbs D.Holland G.Huckle H.E.Jardine K.Jasniewicz G.,Jean-Antoine-Piccolo A.Jimenez-Arranz O.Juaristi Campillo J.,Julbe F.Karbevska L.Kervella P.Khanna S.Kontizas M.,Kordopatis G.Korn A.J.Kospal A.Kostrzewa-Rutkowska Z.,Kruszynska K.Kun M.Laizeau P.Lambert S.Lanza A.F.Lasne Y.,Le Campion J.-F.Lebreton Y.Lebzelter T.Leccia S.Leclerc N.,Lecoeur-Taibi I.Liao S.Licata E.L.Lindstrom H.E.P.Lister T.A.,Livanou E.Lobel A.Lorca A.Loup C.Madrero Pardo P.,Magdaleno Romeo A.Managau S.Mann R.G.Manteiga M.Marchant J.M.,Marconi M.Marcos J.Marcos Santos M.M.S.Marin Pina D.Marinoni S.,Marocco F.Marshall D.J.Martin Polo L.Martin-Fleitas J.M.Marton G.,Mary N.Masip A.Massari D.Mastrobuono-Battisti A.Mazeh T.,McMillan P.J.Messina S.Michalik D.Millar N.R.Mints A.Molina D.,Molinaro R.Molnar L.Monari G.Monguio M.Montegriffo P.Montero A.,Mor R.Mora A.Morbidelli R.Morel T.Morris D.Muraveva T.,Murphy C.P.Musella I.Nagy Z.Noval L.Ocana F.Ogden A.,Ordenovic C.Osinde J.O.Pagani C.Pagano I.Palaversa L.,Palicio P.A.Pallas-Quintela L.Panahi A.Payne-Wardenaar S.,Penalosa Esteller X.Penttila A.Pichon B.Piersimoni A.M.,Pineau F.-X.Plachy E.Plum G.Poggio E.Prsa A.Pulone L.,Racero E.Ragaini S.Rainer M.Ramos P.Ramos-Lerate M.,Re Fiorentin P.Regibo S.Richards P.J.Rios Diaz C.Ripepi V.,Riva A.Rix H.-W.Rixon G.Robichon N.Robin A.C.Robin C.,Roelens M.Rogues H.R.O.Rohrbasser L.Romero-Gomez M.Rowell N.,Royer F.Ruz Mieres D.Rybicki K.A.Sadowski G.Saez Nunez A.,Sagrista Selles A.Sahlmann J.Salguero E.Samaras N.,Sanchez Gimenez V.Sanna N.Santovena R.Sarasso M.Schultheis M.,Sciacca E.Segol M.Segovia J.C.Segransan D.Semeux D.Shahaf S.,Siddiqui H.I.Siebert A.Siltala L.Silvelo A.Slezak E.Slezak I.,Smart R.L.Snaith O.N.Solano E.Solitro F.Souami D.Souchay J.,Spagna A.Spina L.Spoto F.Steele I.A.Steidelmuller H.,Stephenson C.A.Suveges M.Surdej J.Szabados L.Szegedi-Elek E.,Taris F.Taylor M.B.Tolomei L.Tonello N.Torra F.Torra J.,Torralba Elipe G.Trabucchi M.Tsounis A.T.Turon C.Ulla A.,Unger N.Vaillant M.V.van Dillen E.van Reeven W.Vanel O.,Vecchiato A.Viala Y.Vicente D.Voutsinas S.Weiler M.Wevers T.,Wyrzykowski L.Yoldas A.Yvard P.Zhao H.Zorec J.Zucker S.,Zwitter T.2025-01-09T20:00:55Z2023-06-16T13:57:26ZCDS support team

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

cds-question@unistra.frquasarsredshiftedspectrophotometryThe Gaia Galactic survey mission is designed and optimized to obtain astrometry, photometry, and spectroscopy of nearly two billion stars in our Galaxy. Yet as an all-sky multi-epoch survey, Gaia also observes several million extragalactic objects down to a magnitude of G~21mag. Due to the nature of the Gaia onboard-selection algorithms, these are mostly point-source-like objects. Using data provided by the satellite, we have identified quasar and galaxy candidates via supervised machine learning methods, and estimate their redshifts using the low resolution BP/RP spectra. We further characterise the surface brightness profiles of host galaxies of quasars and of galaxies from pre-defined input lists. Here we give an overview of the processing of extragalactic objects, describe the data products in Gaia DR3, and analyse their properties. Two integrated tables contain the main results for a high completeness, but low purity (50-70%), set of 6.6 million candidate quasars and 4.8 million candidate galaxies. We provide queries that select purer sub-samples of these containing 1.9 million probable quasars and 2.9 million probable galaxies (both ~95% purity). We also use high quality BP/RP spectra of 43 thousand high probability quasars over the redshift range 0.05-4.36 to construct a composite quasar spectrum spanning restframe wavelengths from 72-1000nm.2023A&A...674A..41Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/674/A41CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/356 : Gaia DR3 Part 2. Extra-galactic (Gaia Collaboration, 2022)VII/290 : The Million Quasars (Milliquas) catalogue, version 7.2 (Flesch, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/674/A41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/674/A41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/674/A41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/674/A41https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/674/A41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/674/A41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGaiadefaultJ/A+A/674/A41/table8Composite quasar spectrum with 0.052<=z<=4.358recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8aComposite quasar spectrum with 0.052<=z<0.5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8bComposite quasar spectrum with 0.5<=z<1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8cComposite quasar spectrum with 1<=z<2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8dComposite quasar spectrum with 2<=z<3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8eComposite quasar spectrum with 3<=z<4recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordoubleJ/A+A/674/A41/table8fGaia-only composite quasar spectrumrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaRest-frame wavelengthnmem.wlfloatFArbitrarily scaled flux densityphot.flux.density;em.optdoublee_FError in the arbitrarily scaled flux densitystat.errordouble