V/161ivo://CDS.VizieR/V/161CDSDESI Collaboration et al.2025-12-09T14:59:57Z2025-06-27T09:48:38ZCDS support team

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

cds-question@unistra.frinfrared-photometryvisible-astronomybroad-band-photometrysurveysspectroscopyredshiftedproper-motionstrigonometric-parallaxgalaxy-classification-systemsIn 2021 May the Dark Energy Spectroscopic Instrument (DESI) collaboration began a 5-year spectroscopic redshift survey to produce a detailed map of the evolving three-dimensional structure of the universe between z=0 and z~4. DESI's principle scientific objectives are to place precise constraints on the equation of state of dark energy, the gravitationally driven growth of large-scale structure, and the sum of the neutrino masses, and to explore the observational signatures of primordial inflation. We present DESI Data Release 1 (DR1), which consists of all data acquired during the first 13 months of the DESI main survey, as well as a uniform reprocessing of the DESI Survey Validation data which was previously made public in the DESI Early Data Release. The DR1 main survey includes high-confidence redshifts for 18.7M objects, of which 13.1M are spectroscopically classified as galaxies, 1.6M as quasars, and 4M as stars, making DR1 the largest sample of extragalactic redshifts ever assembled. We summarize the DR1 observations, the spectroscopic data-reduction pipeline and data products, large-scale structure catalogs, value-added catalogs, and describe how to access and interact with the data. In addition to fulfilling its core cosmological objectives with unprecedented precision, we expect DR1 to enable a wide range of transformational astrophysical studies and discoveries.2025arXiv250314745Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/V/161CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/356 : Gaia DR3 Part 2. Extra-galactic (Gaia Collaboration, 2022)I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)I/358 : Gaia DR3 Part 4. Variability (Gaia Collaboration, 2022)I/359 : Gaia DR3 Part 5. Solar System (Gaia Collaboration, 2022)I/360 : Gaia DR3 Part 6. Performance verification (Gaia Collaboration, 2022)VII/292 : DESI Legacy Imaging Surveys DR8 photometric redshifts (Duncan, 2022)J/ApJS/132/37 : Spectroscopy of Southern warm IR galaxies (Kewley+, 2001)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/A+A/622/A103 : Python Code Investigating GALaxy Emission (Boquien+, 2019)J/MNRAS/505/5978 : Gaia EDR3 view on Gal. globular clusters (Vasiliev+, 2021)J/A+A/660/A29 : Sp.-phot. distances of ~ 300000 SEGUE stars (Thomas+, 2022)J/ApJ/944/1 : DESI observations of the Andromeda galaxy (Dey+, 2023)J/MNRAS/525/1106 : DESI Peculiar Velocity survey (Saulder+, 2023)J/ApJS/269/3 : Siena Galaxy Atlas 2020 (SGA-2020) (Moustakas+, 2023)J/ApJS/269/27 : DESI z>~5 quasar survey. I. New z~4.7-6.6 QSOs (Yang+, 2023)J/A+A/691/A308 : Physical properties of DESI galaxies (Siudek+, 2024)J/ApJS/273/19 : Elemental abundances from DESI EDR spectra (Zhang+, 2024)http://data.desi.lbl.gov/doc : DESI documentation homepagehttp://desidatamodel.readthedocs.io/en/latest/DESI_SPECTRO_REDUX/SPECPROD/zcatalog/v1/zpix-SURVEY-PROGRAM.html : zcatalog v1 datamodel descriptionhttp://www.legacysurvey.org/ : DESI Legacy Imaging Surveys homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=V/161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=V/161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=V/161https://vizier.cds.unistra.fr/viz-bin/votable?-source=V/161https://vizier.iucaa.in/viz-bin/votable?-source=V/161http://vizieridia.saao.ac.za/viz-bin/votable?-source=V/161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table V/161/zcatdr1 (DESI DR1 redshift catalog (ZCATALOG), sample output (on a total of 28,425,963 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/V/161/zcatdr1?https://vizier.iucaa.in/viz-bin/conesearch/V/161/zcatdr1?http://vizieridia.saao.ac.za/viz-bin/conesearch/V/161/zcatdr1?GETtext/xml+votable180.050000true0/0-11 6/3.830199579824256e-20 4.973527819473193e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/V/161?format=asciiOpticalInfrareddefaultV/161/zcatdr1DESI DR1 redshift catalog (ZCATALOG), sample output (on a total of 28,425,963 sources)TargetID[-826479526/2882315850818256979] Unique DESI target ID (TARGETID)meta.id;meta.mainindexedZWARN[0/2695] Redshift warning bitmask from Redrock (0=good)meta.code;src.redshiftintFz[-13229/193772] LS flux from tractor input (z), in nanomaggy units (FLUX_Z)3.63uJyphot.mag;em.opt.IdoubleRAICRSBarycentric Right Ascension in ICRS (TARGET_RA)degpos.eq.ra;meta.mainindexedDEICRS[-32/85] Barycentric Declination in ICRS (TARGET_DEC)degpos.eq.dec;meta.mainindexedSurveySurvey name (SURVEY)meta.id;meta.datasetcharProgDESI program type - BRIGHT; DARK; BACKUP; OTHER (PROGRAM)meta.id;meta.datasetcharHealpix[0/49151] HEALPixel containing this location at NSIDE=64 in the NESTED scheme (HEALPIX)meta.numberintz[-0.0044/7] Redshift measured by Redrock (Z)src.redshiftdoubleindexede_z[0/0.03] Redshift error from redrock (ZERR)stat.error;src.redshiftdoubleChi2[2/9e99] Best fit chi squared (CHI2)stat.fit.chi2;meta.modelleddoubleCOEFF0Redrock template coefficients 0 (COEFF_0)meta.numberdoubleCOEFF1Redrock template coefficients 1 (COEFF_1)meta.numberdoubleCOEFF2Redrock template coefficients 2 (COEFF_2)meta.numberdoubleCOEFF3Redrock template coefficients 3 (COEFF_3)meta.numberdoubleCOEFF4Redrock template coefficients 4 (COEFF_4)meta.numberdoubleCOEFF5Redrock template coefficients 5 (COEFF_5)meta.numberdoubleCOEFF6Redrock template coefficients 6 (COEFF_6)meta.numberdoubleCOEFF7Redrock template coefficients 7 (COEFF_7)meta.numberdoubleCOEFF8Redrock template coefficients 8 (COEFF_8)meta.numberdoubleCOEFF9Redrock template coefficients 9 (COEFF_9)meta.numberdoubleNpix[0/7933] Number of unmasked pixels contributing to the Redrock fit (NPIXELS)meta.numberintOTypeSpectral type of Redrock best fit template (SPECTYPE) (1)src.classcharSubTypeSpectral subtype (SUBTYPE)src.spTypechardelChi2[0/3.6e7] Chi2 difference between first- and second-best redrock template fits (DELTACHI2)stat.fit.chi2;arith.diffdoubleCOADD_FIBER[0/1098907648] Bitwise-AND of input FIBERSTATUS (COADD_FIBERSTATUS) (2)meta.codelongpmRA[-4513/3980] Reference catalog proper motion in the RA direction (PMRA)mas/yrpos.pm;pos.eq.radoublepmDE[-3438/2106] Reference catalog proper motion in the Dec direction (PMDEC)mas/yrpos.pm;pos.eq.decdoubleRefEp[0/2021.97] Reference catalog reference epoch (e.g.; 2015.5 for GaiaDR2) (REF_EPOCH)yrtime.epoch;pos.pmdoubleTypeObject type: TGT; SKY; NON; BAD (OBJTYPE)meta.codecharObs[0/575] Flag the target to be observed in graytime (OBSCONDITIONS)meta.codeintRelease[-1/9012] Legacy Surveys (LS) Release (RELEASE) (3)meta.idintindexedBrickNameBrick name from tractor input (BRICKNAME)meta.idcharBrickID[0/785162] Brick ID from tractor input (BRICKID)meta.idintindexedObjID[-1/31798] OBJID (unique to brick; but not to file) (BRICK_OBJID)meta.idintindexedMorphMorphological Model type (MORPHTYPE) (4)meta.id;meta.modelled;src.morphcharEBV[0/4] Galactic extinction E(B-V) reddening from Schlegel+ 1998ApJ...500..525Smagphot.color.excessdoubleFg[-1771/70844] Legacy Survey (LS) flux from tractor input (g), in nanomaggy units (FLUX_G)3.63uJyphot.mag;em.opt.BdoubleFr[-249/149823] LS flux from tractor input (r), in nanomaggy units (FLUX_R)3.63uJyphot.mag;em.opt.RdoubleF3.4[-224146/9016309] WISE flux in W1 (3.4um), in nanomaggy units (FLUX_W1)3.63uJyphot.mag;em.IR.3-4umdoubleF4.6[-2704847/5498148] WISE flux in W2 (4.6um), in nanomaggy units (FLUX_W2)3.63uJyphot.mag;em.IR.4-8umdoubleFFg[-92/9471] Predicted g-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing, in nanomaggy units (FIBERFLUX_G)3.63uJyphot.flux;meta.modelled;em.opt.BdoubleFFr[-44/12450] Predicted r-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing, in nanomaggy units (FIBERFLUX_R)3.63uJyphot.flux;meta.modelled;em.opt.RdoubleFFz[-161/12820] Predicted z-band flux within a fiber of diameter 1.5 arcsec from this object in 1 arcsec Gaussian seeing, in nanomaggy units (FIBERFLUX_Z)3.63uJyphot.flux;meta.modelled;em.opt.Idoubleplx[-92.1/161] Reference catalog parallax (PARALLAX)maspos.parallaxdoubleCOADD_EXP[0/43506] Summed exposure time for coadd (COADD_EXPTIME)stime.duration;obs.exposuredoubleRAFdegMean (over exposures) RA of actual fiber position (MEAN_FIBER_RA)degpos.eq.ra;instrs_RAFdeg[0/106] Standard deviation (over exposures) of RA of actual fiber position (STD_FIBER_RA)arcsecstat.stdev;pos.eq.radoubleDEFdegMean (over exposures) DEC of actual fiber position (MEAN_FIBER_DEC)degpos.eq.dec;instrs_DEFdeg[0/110] Standard deviation (over exposures) of DEC of actual fiber position (STD_FIBER_DEC)arcsecstat.stdev;pos.eq.decdoubleb_MJDMinimum value of the Modified Julian Date (when the shutter was open for the first exposure used in the coadded spectrum) (MIN_MJD)dstat.min;time.epochdoubleB_MJDMaximum value of the Modified Julian Date (when the shutter was open for the last exposure used in the coadded spectrum) (MAX_MJD)dstat.max;time.epochdoubleTSNR2_ELGELG template (S/N)^2 summed over B;R;Z (5)stat.snrdoubleTSNR2_GPBBGHTTemplate (S/N)^2 for bright targets in guider pass band (TSNR2_GPBBRIGHT)stat.snrdoubleTSNR2_LYALYA template (S/N)^2 summed over B;R;Z (6)stat.snrdoubleTSNR2_BGSBGS template (S/N)^2 summed over B;R;Z (5)stat.snrdoubleTSNR2_GPBBCKTemplate (S/N)^2 for backup targets in guider pass band (TSNR2_GPBBACKUP) (5)stat.snrdoubleTSNR2_QSOQSO template (S/N)^2 summed over B;R;Z (5)stat.snrdoubleTSNR2_LRGLRG template (S/N)^2 summed over B;R;Z (5)stat.snrdoubleMAIN_PRIM[0/1] Boolean flag (True/False) for the primary coadded spectrum in Main survey (MAIN_PRIMARY)meta.codeintSV_PRIM[0/1] Boolean flag (True/False) for the primary coadded spectrum in survey validation (SV1+2+3) (SV_PRIMARY) (7)meta.codeintm_TargetID[1/8] Number of times this TARGETID appears in this catalog (ZCAT_NSPEC)meta.code.multipintZCAT_PRIM[0/1] Boolean flag (True/False) for the primary coadded spectrum in this zcatalog (ZCAT_PRIMARY)meta.codeintNameHuman readable identifier of a sky location (DESI Jddd.dddd+dd.dddd; with truncated decimal RA_ICRS/DE_ICRS; precise to 0.36"). Multiple objects can map to a single Name if very close on the sky (DESINAME)meta.idcharindexedMJD[59198.1/59744.5] Mean value of the Modified Julian Date (when the shutter was open for exposures used in the coadded spectrum) (MEAN_MJD)dtime.epochdoubleindexed