J/ApJS/273/21ivo://CDS.VizieR/J/ApJS/273/21doi:10.26093/cds/vizier/bb-8h-nCDSWerk J.Tchernyshyov K.Bish H.Zheng Y.Putman M.Peek J.,Schiminovich D.2026-08-03T07:25:24Z2025-01-21T16:51:14ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiquasarsultraviolet-astronomyvisible-astronomyspectroscopyredshiftedtwo-color-diagramsinfrared-astronomyWe present a sample of 305 QSO candidates having |b|<30{deg}, the majority with GALEX magnitudes near-UV<18.75. To generate this sample, we apply UV-IR color selection criteria to photometric data from the Ultraviolet Galactic Plane Survey as part of GALEX-CAUSE, the Million Quasars Catalog, Gaia DR2, and Pan-STARRS DR1. 165 of these 305 candidate UV-bright active galactic nuclei (AGN; 54%) have published spectroscopic redshifts from 45 different surveys, confirming them as AGN. We further obtained low-dispersion, optical, long-slit spectra with the Apache Point Observatory 3.5m, MDM 2.4m, and MDM 1.3m telescopes for 84 of the candidates, and confirm 86% (N=72) as AGN, generally with z<0.6. Of these 72 confirmed AGN, 25 are newly discovered low-latitude QSOs without any previous spectroscopy. These sources fill a gap in the Galactic latitude coverage of the available samples of known UV-bright QSO background probes. Along with a description of the confirmed QSO properties, we provide the fully reduced, flux- and wavelength-calibrated spectra of 72 low-latitude QSOs through the Mikulski Archive for Space Telescopes. Future Hubble Space Telescope/Cosmic Origins Spectrograph spectroscopy of these low-Galactic-latitude QSOs has the potential to transform our view of the Milky Way and Local Group circumgalactic medium.2024ApJS..273...21Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/273/21CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/249 : WHAM Northern Sky Survey, V-1.1 (Haffner+, 2003)VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)II/328 : AllWISE Data Release (Cutri+ 2013)II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)VII/294 : The Million Quasars (Milliquas) catalogue, version 8 (Flesch, 2023)J/A+AS/110/469 : AGN from the RASS (Bade+, 1995)J/A+A/300/323 : NOT GL survey of multiply imaged quasars (Jaunsen+, 1995)J/A+AS/134/483 : The Hamburg Quasar Survey. III. (Hagen+ 1999)J/A+AS/139/575 : RASS AGN sample (Wei+, 1999)J/ApJS/129/547 : RBSC-NVSS sample. I. (Bauer+, 2000)J/ApJ/543/552 : z>3 damped Lya absorption systems (Storrie-Lombardi+, 2000)J/AJ/121/2843 : QSOs in 2MASS 2nd incremental DR (Barkhouse+, 2001)J/ApJ/617/192 : ROSAT AGN Catalog in North Ecliptic Pole (Mullis+, 2004)J/AJ/130/381 : Blueshifted [O III] emission (Boroson+, 2005)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)J/MNRAS/416/2840 : The 2M++ galaxy redshift catalogue (Lavaux+, 2011)J/other/NewA/16.503 : 2MASS observation of BL Lac objects II. (Mao+, 2011)J/ApJ/740/91 : Lya and OVI in galaxies around quasars (Prochaska+, 2011)J/ApJ/751/52 : AGN cand. from the WISE, 2MASS, RASS (W2R) (Edelson+, 2012)J/A+A/545/A15 : AMIGA XI. Optical nuclear activity (Sabater+, 2012)J/MNRAS/430/2464 : The CLASS BL Lac sample (Marcha+, 2013)J/ApJ/767/14 : MASIV survey III. Optical identifications (Pursimo+, 2013)J/A+A/561/A67 : Spectra of 75 Swift/BAT optical counterparts (Parisi, 2014)J/A+A/573/A59 : Gas kinematics in CALIFA survey (Garcia-Lorenzo+, 2015)J/other/RAA/15.1438 : LAMOST new QSOs in M31 and M33 vicinity (Huo+, 2015)J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)J/AJ/152/25 : The UV-bright Quasar Survey (UVQS) DR1 (Monroe+, 2016)J/ApJ/818/113 : HST obs. of QSOs with medium spectra (Neeleman+, 2016)J/ApJ/831/7 : SDSS-RM project: peak velocities of QSOs (Shen+, 2016)J/AJ/154/114 : KODIAQ DR2 (O'Meara+, 2017)J/ApJS/233/3 : VLBA Extragalactic Proper Motion Cat. (Truebenbach+, 2017)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/AJ/155/189 : LAMOST Quasar Survey: QSO data from DR2&3 (Dong+, 2018)J/ApJ/861/49 : ALFALFA extragalactic HI source catalog (Haynes+, 2018)J/ApJ/871/35 : HST/COS spectra of QSOs with SiIV data (Zheng+, 2019)J/ApJS/254/6 : Finding QSOs behind the Galactic Plane. I. (Fu+, 2021)J/ApJS/261/32 : Finding GPQs. II. Sp. obs. of |b|<20{deg} QSOs (Fu+, 2022)http://archive.stsci.edu/hlsp/pqs : The Plane Quasar Survey (PQS) on MASThttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/273/21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/273/21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/273/21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/273/21https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/273/21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/273/21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/273/21/table1 (Plane QSO candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/273/21/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/273/21/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/273/21/table1?GETtext/xml+votable180.050000true5.85311260.8511720.005555555555555556Cone search capability for table J/ApJS/273/21/table2 (Plane QSO candidate spectroscopic redshifts)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/273/21/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/273/21/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/273/21/table2?GETtext/xml+votable180.050000true5.85311260.8511720.0055555555555555566/941 1718 1820 2161 2245 2270 2284 2287 2309 2313 2456 2584 2610 2621 2638 2644 2663 3047 3088 3091 3233 3238 3365 3413 3956 4098 4100 4107 4256-4257 4259 4615 4651 4745 4767 6149 6220 6222-6223 6264 6270 6273 6295 6303 6364 6391 6528 6534-6535 6555 6582 6590 6855 6920 6923 6928 6968 6977 7000 7014 7017 7156 7814-7815 7859 7896 7903 8066 8088 9541 9555 12254 12299 12317 12463 12604 12708 12752 12875 13085 13262 13273 13365 13382 13438 13452 13458 13496 13826 14106 14161 14287 14858 14960 15008 15019 15059 15076 15098 15147 15192 15247 16011 16034 16045 16059 16080 16109 16184 20427 20526 20574 20635 20639 20680 20685 20707 20750 20756 20840 20977 21020 21527 21534 21548 21579 21592 21624 21665 21689 21723 21749 21754-21755 21758 21792 21802 21824 21829 21838 21883 21937 21950 21955 21958 21996 22011 22020 22053 22086 22100-22101 22108 22112 22249 22267 22275 22282 22315 22363 22365 22402 22404 22406 22419 22426 22436 22445 22456 22458 22461 22488 23353 23837 23861 23874 23882 23889 23900 23904 24390 24511 24587 24651 24739 24747 25089 29718 29975 30018 30021 30040 30071 30467 30484 30487 30558 31045 31101 31162 31199 31833 31835 32031 32344 32557-32558 32691 33045 34048 34139 36907 37035 37385 37417 37458 37504 37510 37512 37531 37538 37926 38239 38266 38299 38329 38365 38383 38474 38745 38771 38804 38835 38849 38851 38859 38944 39531 39773 39910 40119 40170 40246 40250 40288 40294 40344 40351 40442-40443 40468 40510 40514 40546 40593 40596 40640-40642 40649 40668 40732 40768-40769 40771-40772 40830-40831 40923 40939 40952 41231 41435 41444 42102 42179 43247 43546 43596 43825 43834 43860 44331 44428 45699 45757 47169 47219 47222 47226 47402 47522 47524 47875 48022 48750 48783 48865 49042 490607.447298006782415e-19 9.736485774071566e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/273/21?format=asciiUVOpticalInfrareddefaultJ/ApJS/273/21/table1Plane QSO candidatesBandOptical band (B, V, r or R)meta.code;instr.filter;em.optcharW1-W2[0/2.1] W1-W2 color indexmagphot.color;em.IR.3-4um;em.IR.4-8umfloatz[0/1.3]? Spectroscopic redshiftsrc.redshiftfloatnullabler_zReference for z (ADS/SIMBAD bibcode)meta.ref;src.redshiftcharMilliquasDisplay data from Milliquas (VII/294)meta.ref.urlintnullableGALEXDisplay data from GALEX AIS (II/335)meta.ref.urlintnullableWISEADisplay data from AllWISE (II/328)meta.ref.urlintnullableSloanDisplay the online SDSS-DR17 data for the nearest objectmeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPQSPQS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimarySpDisplay the spectroscopic redshifts (link to Table 2)meta.ref.urlcharSNameSIMBAD namemeta.id.crosscharGLONGalactic longitudedegpos.galactic.lonGLAT[-30/30] Galactic latitudedegpos.galactic.latNUVmag[12.9/20.2] GALEX NUV apparent magnitudemagphot.mag;em.UV.200-300nmfloatOmag[9.3/21]? Optical apparent magnitude in Bandmagphot.mag;em.optfloatnullableJ/ApJS/273/21/table2Plane QSO candidate spectroscopic redshiftsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGLON[39/278.2] Galactic longitudedegpos.galactic.lonGLAT[-29/30] Galactic latitudedegpos.galactic.latNUVmag[14.67/20.14] GALEX NUV apparent magnitudemagphot.mag;em.UV.200-300nmfloatTelTelescope ("APO-3.5m", "MDM-2.4m" or "MDM-1.3m")meta.id;instr.telcharTypeSpectral classification ("AGN": 70 sources or "Star": 12 sources)src.classcharzNarrow[0.027/0.71]? Estimated spectroscopic redshift (1)src.redshiftfloatnullablezMARZ[0.0005/1.31]? MARZ spectroscopic redshift (2)src.redshiftfloatnullablezRef[0.025/1.3]? Previously published spectroscopic redshiftsrc.redshiftfloatnullabler_zRefReference for zRef (ADS/SIMBAD bibcode)meta.ref;src.redshiftcharFileNameName of the FITS file in subdirectory "sp"; column added by CDS (3)meta.id;meta.fitscharfitsDownload the FITS filemeta.ref.urlcharspInteractive spectrum plotmeta.ref.urlchar_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexed_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexedPQSPQS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.mainchar