J/ApJS/280/68ivo://CDS.VizieR/J/ApJS/280/68CDSMatsuoka Y.Iwasawa K.Onoue M.Izumi T.Strauss M.A.Akiyama M.,Aoki K.Arita J.Ding X.Imanishi M.Kashikawa N.Kawaguchi T.,Kikuta S.Kohno K.Lee C.-H.Nagao T.Phillips C.L.Sawamura M.,Silverman J.D.Takahashi A.Toba Y.2026-08-07T08:34:06Z2026-08-07T09:23:52ZCDS support team

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

cds-question@unistra.frquasarsvisible-astronomyspectroscopyredshiftedabsolute-magnitudeline-intensitiesinfrared-photometrybroad-band-photometrybrown-dwarfsWe present spectroscopic identification of 43 quasars and 11 candidate obscured quasars in the epoch of reionization (EoR) at 5.71<=z<=7.02, along with 29 galaxies at similar redshifts. This is the 24th publication from the Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs) project, which exploits the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) imaging survey to search for EoR quasars. The HSC-SSP survey has finished, and this paper is likely the final installment of major (unobscured) quasar discoveries from the SHELLQs project. In addition to the EoR objects, we identified five strong [OIII] line emitters at z<1, 30 Galactic brown dwarfs, and 14 passive galaxies at z~2, which contaminated our sample of photometric quasar candidates. The present paper focuses on describing the immediate outcome of the spectroscopic observations, while a statistical analysis of the full SHELLQs sample will be presented in our next publication.2025ApJS..280...68Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/280/68CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/382 : VIKING catalogue data release 4 (Cross+, 2012)VII/292 : DESI Legacy Imaging Surveys DR8 photometric redshifts (Duncan, 2022)J/MNRAS/477/2817 : Luminous Ly{alpha} emitters at z~2-3 (Sobral+, 2018)J/A+A/643/A149 : J-PLUS Ly{alpha}-emitting candidates (Spinoso+, 2020)J/ApJS/259/18 : SHELLQs. XVI. New quasars at 5.8<z<7 (Matsuoka+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/280/68https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/280/68http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/280/68https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/280/68https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/280/68http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/280/68GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/280/68/table1 (Spectroscopic properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/280/68/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/280/68/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/280/68/table1?GETtext/xml+votable180.050000true202.554166742.57561110.005555555555555556Cone search capability for table J/ApJS/280/68/table2 (Journal of discovery spectroscopy)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/280/68/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/280/68/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/280/68/table2?GETtext/xml+votable180.050000true202.554166742.57561110.0055555555555555566/4138 8232 9814 10581 10652-10653 10671 11008-11009 17717 17721 17734 17762 17765 17769 17791 17797 17819 17822 17827 17835 17853 17855 17864 17866 17877 17888 17899 18012 18087-18089 18105 18125 18134 18140 18145 18147 18149 18160 18181 18187 18191 18194 18196 18208 18211 18214 18221-18222 18226 18805 18811 18848 18920 18923 19033 19036 19217 19219 19229 19237 19247 19331 19336 19457 19467 19500 21840 21875 21877 25847 25852 25918 25981 25991 26018 26039 26041 26053 26062 26067 26070 26086 26203-26204 26210 26225 26231 26234 26236 26307-26309 26315 26352 26373 26375-26376 26382 26384 26412 26960 26979 26981 27031 27037 27042 27058 27086 27092 27095 27112 27242 27271 27411 27424 27520 27660 27668 27672 409561.8528478339452288e-19 2.8554715509763853e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/280/68?format=asciiOpticalInfrareddefaultJ/ApJS/280/68/table1Spectroscopic propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClassObject class (1)meta.code.classcharNameName of the source (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharz[0.78/7.02] Redshift (2)src.redshiftfloatM1450[-26.1/-20.2]? Absolute 1450{AA} AB magnitudemagphys.magAbs;em.UV.100-200nmfloatnullablee_M1450[0.01/1.6]? M1450 uncertaintymagstat.error;phys.magAbs;em.UV.100-200nmfloatnullableLineLine identifiermeta.id;spect.linecharl_EWrLimit flag on EWr (3{sigma})meta.code.error;spect.line.eqWidthcharEWr[0.4/5900]? Rest-frame equivalent width0.1nmspect.line.eqWidthfloatnullablee_EWr[0.3/2900]? EWr uncertainty0.1nmstat.error;spect.line.eqWidthfloatnullablel_FWHMLimit flag on FWHM (3{sigma})meta.code.error;spect.line.widthcharFWHM[190/11000]? Line Full Width at Half Maximumkm/sspect.line.widthintnullablee_FWHM[10/4000]? FWHM uncertaintykm/sstat.error;spect.line.widthintnullablelogL[40.9/44.7]? Log of the line luminosity in erg/slog(1e-07W)phys.luminosity;spect.linefloatnullablee_logL[0.01/0.4]? logL uncertaintylog(1e-07W)stat.error;phys.luminosity;spect.linefloatnullable_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.mainJ/ApJS/280/68/table2Journal of discovery spectroscopyInstInstrument (3)meta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNspNumber of line measurements for this source (link to Table 1)meta.numberintnullableClassObject class (1)meta.code.classcharNameName of the source (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryl_imagLimit flag on imag (5{sigma} significance)meta.code.error;phot.mag;em.opt.Icharimag[23.58/27.52] i-band AB magnitude (2)magphot.mag;em.opt.Ifloate_imag[0.02/0.92]? Uncertainty on the imagmagstat.error;phot.mag;em.opt.Ifloatnullablel_zmagLimit flag on zmag (5{sigma} significance)meta.code.error;phot.mag;em.opt.Icharzmag[21.59/26.4] z-band AB magnitude (2)magphot.mag;em.opt.Ifloate_zmag[0.01/0.8]? Uncertainty on the zmagmagstat.error;phot.mag;em.opt.Ifloatnullableymag[20.66/26.5] y-band band AB magnitude (2)magphot.mag;em.IR.Jfloate_ymag[0.01/1] Uncertainty on the ymagmagstat.error;phot.mag;em.IR.JfloatTexp[10/120] Exposure timemintime.duration;obs.exposureintDate1Date of observation (UT)time.epochnullableDate2Date of observation (UT)time.epochnullable_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.main