J/A+A/700/A111ivo://CDS.VizieR/J/A+A/700/A111doi:10.26093/cds/vizier.37000111CDSParra Tello M.Bauer F.E.De Cicco D.Doll G.Koss M.Treister E.,Finlez C.Troncoso M.Auge C.del Moral-Castro I.Chung A.Gupta K.K.,Kim J.Oh K.Ricci C.Ricci F.Rojas A.Caglar T.Harrison F.,Powell M.C.Stern D.Trakhtenbrot B.Urry C.M.2025-08-27T20:01:15Z2025-08-11T09:11:04ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleix-ray-sourcesWe present detailed morphological classifications for the hosts of 1189 hard- X-ray-selected (14-195keV) active galactic nuclei (AGN) from the Swift-BAT 105-month catalog as part of the BAT AGN Spectroscopic Survey (BASS). BASS provides a powerful all-sky census of nearby AGN, minimizing obscuration biases and providing a robust dataset for studying AGN-host galaxy connections. Classifications are based on a volunteer-based visual inspection workflow on the Zooniverse platform, adapted from the Galaxy Zoo DECaLS (GZD) project. Dual-contrast grz color composite images, generated from public surveys (e.g., NOAO Legacy Survey, Pan-STARRS, SDSS) and dedicated observations, enabled the identification of key morphological features. Our analysis reveals that, with respect to a control sample of inactive galaxies, BASS AGN hosts show a deficiency of smooth elliptical galaxies (~70%) and spiral galaxies with prominent arms (~80%), while displaying an excess of mergers or disturbed systems (~400%), and disk galaxies without spiral structure (~300%). These trends are found after controlling for redshift and i-band magnitude, suggesting a preference for AGN activity in gas-rich, dynamically disturbed environments or transitional disk systems. We also find a higher bar fraction among AGN hosts than in a control sample (~50% vs. ~30%). We further explore the relationships between AGN properties (e.g., X-ray luminosity, black hole mass, and Eddington ratio) and host morphology, finding that high-luminosity and high-accretion AGN preferentially reside in smooth or point-like hosts. At the same time, lower-luminosity AGN are more common in disk galaxies. These results underscore the importance of morphological studies in understanding the fueling and feedback mechanisms driving AGN activity and their role in galaxy evolution. Our dataset provides a valuable benchmark for future multi-wavelength surveys (e.g. LSST, Roman, and Euclid) and automated morphological classification efforts.2025A&A...700A.111Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A111CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)J/ApJS/261/2 : BASS. XXII. The Swift/BAT AGN Sp. Survey DR2 cat. (Koss+, 2022)http://www.bass-survey.com/ : The BAT AGN Spectroscopic Survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/700/A111https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/700/A111http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/700/A111https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/700/A111https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/700/A111http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/700/A111GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/700/A111/table4 (Visual morphological classifications of 1189 hard X-ray selected AGN)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/700/A111/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/700/A111/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/700/A111/table4?GETtext/xml+votable180.050000true0.20325-7.15322220.0055555555555555566/43 134 158 181 243 325 392 406 611 615 697 723 731 745 815-816 879 893 907 941 953 967 1008 1093 1120-1121 1125 1263 1320 1358 1405 1526 1546 1566 1583 1638 1677 1696 1701-1702 1782 1835 1841 1919 2004 2091 2134 2147 2206 2216 2221 2251 2273 2276 2295 2327 2390 2397 2464 2485 2505 2512 2531 2549 2551-2552 2564 2675 2764 2846 3023 3056 3075 3103 3105 3219 3223 3233 3263 3309 3341 3429 3431 3502 3704 3724 3738 3762 3771 3843 3886 3900 4027 4029 4114 4155 4215 4231 4329 4367 4369 4439 4477 4488 4535 4540 4558 4589 4669 4784 4834 4867 4908 4992-4993 5018 5022 5091 5097 5149 5284 5395 5423 5463 5514 5576 5597 5662 5693 5699 5762 5766 5793 5909 5964 5972 5975-5976 5989 5996 6013-6014 6021 6029 6044 6097 6110 6113 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49061https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/700/A111?format=asciiX-raydefaultJ/A+A/700/A111/table4Visual morphological classifications of 1189 hard X-ray selected AGNrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBAT[1/1632] Swift-BAT survey ID (BAT_ID)meta.idintSwiftSwift-BAT identifier (JHHMM.m+DDMMA or JHHMMSS.s+DDMMSS) (SWIFT_NAME)meta.id;meta.maincharctpNameCounterpart source name (COUNTERPART_NAME)meta.idcharMainClassOriginal visual classification (MAIN_CLASS)src.classcharreClassSame as MAIN_CLASS, except that Point-like and Other/Uncertain sources were reclassified with more lenient criteria (RECLASS)src.classcharbarStrength? Strength of the galactic bar structure (BAR_STRENGTH) (1)src.morph.paramchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadNameSimbad column added by the CDSmeta.idcharnullable