J/AJ/128/1002ivo://CDS.VizieR/J/AJ/128/1002doi:10.26093/cds/vizier.51281002CDSZakamska N.L.Strauss M.A.Heckman T.M.Ivezic Z.Krolik J.H.2023-04-06T16:51:06Z2005-04-30T16:21:50ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsgalaxiesinfrared-sourcesradio-galaxiesx-ray-sourcesredshiftedType II quasars are luminous active galactic nuclei (AGNs) whose central engines and broad-line regions are obscured by intervening material; such objects only recently have been discovered in appreciable numbers. We study the multiwavelength properties of 291 type II AGN candidates (0.3<z<0.8) selected on the basis of their optical emission-line properties from the spectroscopic database of the Sloan Digital Sky Survey (Cat. <J/AJ/126/2579>). This sample includes about 150 objects luminous enough to be classified as type II quasars. We matched the sample to the FIRST (20cm, Cat.<VIII/71>), IRAS (12-100{mu}m, Cat. <II/125>), 2MASS (JHK_s_, Cat. <II/246>), and RASS (0.1-2.4keV, Cat. <IX/29>) surveys. Roughly 10% of optically selected type II AGN candidates are radio-loud, comparable to the AGN population as a whole. About 40 objects are detected by IRAS at 60 and/or 100{mu}m, and the inferred mid/far-IR luminosities lie in the range L=10^45^-3x10^46^ergs/s. Average IR-to-[OIII]{lambda}5007 ratios of objects in our sample are consistent with those of other AGNs. Objects from our sample are 10 times less likely to have soft X-ray counterparts in RASS than type I AGNs with the same redshifts and [OIII]{lambda}5007 luminosities. The few type II AGN candidates from our sample that are detected by RASS have harder X-ray spectra than those of type I AGNs. The multiwavelength properties of the type II AGN candidates from our sample are consistent with their interpretation as powerful obscured AGNs.2004AJ....128.1002Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/128/1002CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/126/2125 : SDSS candidate type II quasars (Zakamska+, 2003)J/AJ/123/567 : SDSS quasar catalog, I: Early Data Release (Schneider+, 2002)J/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+, 2003)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS)IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/128/1002https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/128/1002http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/128/1002https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/128/1002https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/128/1002http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/128/1002GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/128/1002/table1 (FIRST Matches of Type II AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1002/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1002/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1002/table1?GETtext/xml+votable180.050000true6.3810833-10.67283330.005555555555555556Cone search capability for table J/AJ/128/1002/table2 (Radio Matches of Type II AGNs Not Covered by FIRST)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1002/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1002/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1002/table2?GETtext/xml+votable180.050000true52.41604170.87222220.005555555555555556Cone search capability for table J/AJ/128/1002/table3 (IRAS Counterparts of Type II AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1002/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1002/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1002/table3?GETtext/xml+votable180.050000true6.3810833-10.67283330.005555555555555556Cone search capability for table J/AJ/128/1002/table4 (RASS Counterparts of Type II AGNs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/128/1002/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/128/1002/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/128/1002/table4?GETtext/xml+votable180.050000true18.6233750.01019440.0055555555555555566/0 4097 4102 4106 4109 4114 5099 5747 5755 5806 5819 5877 6015 6046 6072 6215 6252 6341 6352 6355 6357 6403 6430 6444 6461-6462 6470 6476 6540 6542-6543 6547 6556 6561 6593 6610 6626 7184 7201 7229 7243 7284-7285 7300 7360 7434 7456 7522 8198 9512 9632 9965 10075 10087 11147 11224 11239 11333 11354 11363 11369 11456 11498 11948 12556 17229 17725 17750 17753 17755 17768 17770-17772 17774 17806 17826 17831 17836 17857 18007-18009 18024 18028 18068 18072 18390 18537 18772 18790 18829 18831 18844 18853 19050 19052 19111 21845 21847 21855 23190 23193 23196 23198 23202 23204 23208 23214 23216 25596 25845 25847 25851 25910-25911 25916 25946 25949-25950 25969 25971 25973 25979 26018 26021 26058 26188 26246 26267 26293 26302 26310 27046 27058 27220 27242 27246 27249 27255 27290 27293 27302 27304 27311 27313 27315 27332 27337 27346 27392 27426 27681 31295 31338 31374 31425 32508 32682 36792 36812https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/128/1002?format=asciiX-rayOpticalInfraredRadiodefaultJ/AJ/128/1002/table1FIRST Matches of Type II AGNsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSDSSSDSS Name, based on J2000.0 position (G1)charzRedshiftfloatlogLumLog of [OIII]{lambda}(5007) luminosity in solar unitslog(solLum)floatF20cmcFIRST (20cm) core flux (1.5GHz)mJyfloatF20cmt20cm total fluxmJyfloatSp+Index? Spectral indexfloatnullableMorph[1/2] Morphology code (1)intRefReferences (2)charRadioFind all Radio data in a 1arcmin circle around the QuasarcharXrayFind all X-ray data in a 1arcmin circle around the Quasarchar_RAPosition (derived from the SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the SDSS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/128/1002/table2Radio Matches of Type II AGNs Not Covered by FIRSTrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSDSSSDSS Name, based on J2000.0 position (G1)charzRedshiftfloatlogLumLog of [OIII]{lambda}(5007) luminosity in solar unitslog(solLum)floatOffsetOffset between the optical and radio positionarcminfloatF1.4GHzFlux density at 1.4GHzmJyfloatSp+Index? Spectral IndexfloatnullableMorph[1/2] Morphology code (1)intRefReferences (2)charRadioFind all Radio data in a 1arcmin circle around the QuasarcharXrayFind all X-ray data in a 1arcmin circle around the Quasarchar_RAPosition (derived from the SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the SDSS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/128/1002/table3IRAS Counterparts of Type II AGNsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSDSSSDSS Name, based on J2000.0 position (G1)charzRedshiftfloatlogLumLog of [OIII]{lambda}(5007) luminosity in solar unitslog(solLum)floatF60um? Flux at 60 micronsmJyintnullablee_F60um? Nominal error in F60ummJyintnullablec60um? Confidence level of the 60 micron detectionfloatnullableF100um? Flux at 100 micronsmJyintnullablee_F100um? Nominal error in F100ummJyintnullablec100um? Confidence level of the 100 micron detectionfloatnullableRadioFind all Radio data in a 1arcmin circle around the QuasarcharXrayFind all X-ray data in a 1arcmin circle around the QuasarcharIRASDisplay the Infra-red data from the IRAS missionchar_RAPosition (derived from the SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the SDSS name) (declination part)degpos.eq.dec;meta.mainJ/AJ/128/1002/table4RASS Counterparts of Type II AGNsCom[yes no] Radio-loud ?charzRedshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intSDSSSDSS Name, based on J2000.0 position (G1)charlogLumLog of [OIII]{lambda}(5007) luminosity in solar unitslog(solLum)floatOffsetOffset between the SDSS and the RASS positionsarcminfloatCRCount ratect/sfloatHR1Hardness ratio 1 (1)floatHR2Hardness ratio 2 (1)floatlogLXlog(L_X_) in units of erg/slog(1e-07W)floatRadioFind all Radio data in a 1arcmin circle around the QuasarcharXrayFind all X-ray data in a 1arcmin circle around the Quasarchar_RAPosition (derived from the SDSS name) (right ascension part)degpos.eq.ra;meta.main_DEPosition (derived from the SDSS name) (declination part)degpos.eq.dec;meta.main