II/388ivo://CDS.VizieR/II/388CDSEuclid CollaborationMellier Y.AbdurroufAcevedo Barroso J.A.,Achucarro A.Adamek J.Adam R.Addison G.E.Aghanim N.Aguena M. et al.2025-07-01T06:26:59Z2025-05-06T15:07:19ZCDS support team

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

cds-question@unistra.frsurveysphotometryvisible-astronomyinfrared-astronomyThe current standard model of cosmology successfully describes a variety of measurements, but the nature of its main ingredients, dark matter and dark energy, remains unknown. Euclid is a medium-class mission in the Cosmic Vision 2015-2025 programme of the European Space Agency (ESA) that will provide high-resolution optical imaging, as well as near-infrared imaging and spectroscopy, over about 14000deg^2^ of extragalactic sky. In addition to accurate weak lensing and clustering measurements that probe structure formation over half of the age of the Universe, its primary probes for cosmology, these exquisite data will enable a wide range of science. This paper provides a high-level overview of the mission, summarising the survey characteristics, the various data-processing steps, and data products. We also highlight the main science objectives and expected performance.2025A&A...697A...1Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/II/388CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttps://euclid.esac.esa.int/dr/q1/dpdd/ : Euclid Q1 version Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=II/388https://vizier.iucaa.in/viz-bin/VizieR-2?-source=II/388http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=II/388https://vizier.cds.unistra.fr/viz-bin/votable?-source=II/388https://vizier.iucaa.in/viz-bin/votable?-source=II/388http://vizieridia.saao.ac.za/viz-bin/votable?-source=II/388GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table II/388/mer1 (Euclid final merged catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/II/388/mer1?https://vizier.iucaa.in/viz-bin/conesearch/II/388/mer1?http://vizieridia.saao.ac.za/viz-bin/conesearch/II/388/mer1?GETtext/xml+votable180.050000true269.481361158564963.46921966885470.0055555555555555560/0-11 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/II/388?format=asciiOpticalInfrareddefaultII/388/mer1Euclid final merged catalogObjectIdEuclid unique source identifier (OBJECT_ID)meta.id;meta.mainindexedFluxNIR4? NIR stack band source aperture photometry flux (4 FWHM diameter) on PSF-matched images (FLUX_NIR_STACK_4FWHM_APER)uJyphot.flux.density;em.IRdoublenullableindexedRAJ2000Source barycenter right ascension (J2000) (SExtractor ALPHA_J2000) (RIGHT_ASCENSION)degpos.eq.ra;meta.mainDEJ2000Source barycenter declination (J2000) (SExtractor DELTA_J2000) (DECLINATION)degpos.eq.dec;meta.mainSegMapIdSource ID in the associated segmentation map (SEGMENTATION_MAP_ID)obs.fieldVisDet[0/1] Flag to indicate if the source is detected in the VIS mosaic (1) or is only detected in the NIR mosaic (0) (VIS_DET)meta.codeintFluxVis1? VIS band source aperture photometry flux (1 FWHM diameter) on PSF-matched images (FLUX_VIS_1FWHM_APER)uJyphot.flux.density;em.optdoublenullableFluxVis2? VIS band source aperture photometry flux (2 FWHM diameter) on PSF-matched images (FLUX_VIS_2FWHM_APER)uJyphot.flux.density;em.optdoublenullableFluxVis3? VIS band source aperture photometry flux (3 FWHM diameter) on PSF-matched images (FLUX_VIS_3FWHM_APER)uJyphot.flux.density;em.optdoublenullableFluxVis4? VIS band source aperture photometry flux (4 FWHM diameter) on PSF-matched images (FLUX_VIS_4FWHM_APER)uJyphot.flux.density;em.optdoublenullableindexedFluxY1? NIR Y band source aperture photometry flux (1 FWHM diameter) on PSF-matched images (FLUX_Y_1FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxY2? NIR Y band source aperture photometry flux (2 FWHM diameter) on PSF-matched images (FLUX_Y_2FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxY3? NIR Y band source aperture photometry flux (3 FWHM diameter) on PSF-matched images (FLUX_Y_3FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxY4? NIR Y band source aperture photometry flux (4 FWHM diameter) on PSF-matched images (FLUX_Y_4FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableindexedFluxJ1? NIR J band source aperture photometry flux (1 FWHM diameter) on PSF-matched images (FLUX_J_1FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxJ2? NIR J band source aperture photometry flux (2 FWHM diameter) on PSF-matched images (FLUX_J_2FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxJ3? NIR J band source aperture photometry flux (3 FWHM diameter) on PSF-matched images (FLUX_J_3FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableFluxJ4? NIR J band source aperture photometry flux (4 FWHM diameter) on PSF-matched images (FLUX_J_4FWHM_APER)uJyphot.flux.density;em.IR.JdoublenullableindexedFluxH1? NIR H band source aperture photometry flux (1 FWHM diameter) on PSF-matched images (FLUX_H_1FWHM_APER)uJyphot.flux.density;em.IR.HdoublenullableFluxH2? NIR H band source aperture photometry flux (2 FWHM diameter) on PSF-matched images (FLUX_H_2FWHM_APER)uJyphot.flux.density;em.IR.HdoublenullableFluxH3? NIR H band source aperture photometry flux (3 FWHM diameter) on PSF-matched images (FLUX_H_3FWHM_APER)uJyphot.flux.density;em.IR.HdoublenullableFluxH4? NIR H band source aperture photometry flux (4 FWHM diameter) on PSF-matched images (FLUX_H_4FWHM_APER)uJyphot.flux.density;em.IR.HdoublenullableindexedFluxNIR1? NIR stack band source aperture photometry flux (1 FWHM diameter) on PSF-matched images (FLUX_NIR_STACK_1FWHM_APER)uJyphot.flux.density;em.IRdoublenullableFluxNIR2? NIR stack band source aperture photometry flux (2 FWHM diameter) on PSF-matched images (FLUX_NIR_STACK_2FWHM_APER)uJyphot.flux.density;em.IRdoublenullableFluxNIR3? NIR stack band source aperture photometry flux (3 FWHM diameter) on PSF-matched images (FLUX_NIR_STACK_3FWHM_APER)uJyphot.flux.density;em.IRdoublenullablee_FluxVis1? VIS band source aperture photometry flux (1 FWHM diameter) on PSF-matched images error (FLUXERR_VIS_1FWHM_APER)uJystat.errordoublenullablee_FluxVis2? VIS band source aperture photometry flux (2 FWHM diameter) on PSF-matched images error (FLUXERR_VIS_2FWHM_APER)uJystat.errordoublenullablee_FluxVis3? VIS band source aperture photometry flux (3 FWHM diameter) on PSF-matched images error (FLUXERR_VIS_3FWHM_APER)uJystat.errordoublenullablee_FluxVis4? VIS band source aperture photometry flux (4 FWHM diameter) on PSF-matched images error (FLUXERR_VIS_4FWHM_APER)uJystat.errordoublenullablee_FluxY1? NIR Y band source aperture photometry flux (1 FWHM diameter) on PSF-matched images error (FLUXERR_Y_1FWHM_APER)uJystat.errordoublenullablee_FluxY2? NIR Y band source aperture photometry flux (2 FWHM diameter) on PSF-matched images error (FLUXERR_Y_2FWHM_APER)uJystat.errordoublenullablee_FluxY3? NIR Y band source aperture photometry flux (3 FWHM diameter) on PSF-matched images error (FLUXERR_Y_3FWHM_APER)uJystat.errordoublenullablee_FluxY4? NIR Y band source aperture photometry flux (4 FWHM diameter) on PSF-matched images error (FLUXERR_Y_4FWHM_APER)uJystat.errordoublenullablee_FluxJ1? NIR J band source aperture photometry flux (1 FWHM diameter) on PSF-matched images error (FLUXERR_J_1FWHM_APER)uJystat.errordoublenullablee_FluxJ2? NIR J band source aperture photometry flux (2 FWHM diameter) on PSF-matched images error (FLUXERR_J_2FWHM_APER)uJystat.errordoublenullablee_FluxJ3? NIR J band source aperture photometry flux (3 FWHM diameter) on PSF-matched images error (FLUXERR_J_3FWHM_APER)uJystat.errordoublenullablee_FluxJ4? NIR J band source aperture photometry flux (4 FWHM diameter) on PSF-matched images error (FLUXERR_J_4FWHM_APER)uJystat.errordoublenullablee_FluxH1? NIR H band source aperture photometry flux (1 FWHM diameter) on PSF-matched images error (FLUXERR_H_1FWHM_APER)uJystat.errordoublenullablee_FluxH2? NIR H band source aperture photometry flux (2 FWHM diameter) on PSF-matched images error (FLUXERR_H_2FWHM_APER)uJystat.errordoublenullablee_FluxH3? NIR H band source aperture photometry flux (3 FWHM diameter) on PSF-matched images error (FLUXERR_H_3FWHM_APER)uJystat.errordoublenullablee_FluxH4? NIR H band source aperture photometry flux (4 FWHM diameter) on PSF-matched images error (FLUXERR_H_4FWHM_APER)uJystat.errordoublenullablee_FluxNIR1? NIR stack band source aperture photometry flux (1 FWHM diameter) on PSF-matched images error (FLUXERR_NIR_STACK_1FWHM_APER)uJystat.errordoublenullablee_FluxNIR2? NIR stack band source aperture photometry flux (2 FWHM diameter) on PSF-matched images error (FLUXERR_NIR_STACK_2FWHM_APER)uJystat.errordoublenullablee_FluxNIR3? NIR stack band source aperture photometry flux (3 FWHM diameter) on PSF-matched images error (FLUXERR_NIR_STACK_3FWHM_APER)uJystat.errordoublenullablee_FluxNIR4? NIR stack band source aperture photometry flux (4 FWHM diameter) on PSF-matched images error (FLUXERR_NIR_STACK_4FWHM_APER)uJystat.errordoublenullableFluxYTemp? NIR Y band source template fitting flux (TPHOT measurement) (FLUX_Y_TEMPLFIT)uJyphot.flux.density;em.IR.JdoublenullableFluxJTemp? NIR J band source template fitting flux (TPHOT measurement) (FLUX_J_TEMPLFIT)uJyphot.flux.density;em.IR.JdoublenullableFluxHTemp? NIR H band source template fitting flux (TPHOT measurement) (FLUX_H_TEMPLFIT)uJyphot.flux.density;em.IR.Hdoublenullablee_FluxYTemp? NIR Y band source template fitting flux error (TPHOT measurement) (FLUXERR_Y_TEMPLFIT)uJystat.errordoublenullablee_FluxJTemp? NIR J band source template fitting flux error (TPHOT measurement) (FLUXERR_J_TEMPLFIT)uJystat.errordoublenullablee_FluxHTemp? NIR H band source template fitting flux error (TPHOT measurement) (FLUXERR_H_TEMPLFIT)uJystat.errordoublenullableFluxVispsf? VIS band source PSF-fitting photometry flux (TPHOT measurement) (FLUX_VIS_PSF)uJyphot.flux.density;em.optdoublenullablee_FluxVispsf? VIS band source PSF-fitting photometry flux error (TPHOT measurement) (FLUXERR_VIS_PSF)uJystat.errordoublenullableFluxSegVIS or NIR stack band source segmented area flux (FLUX_SEGMENTATION)uJyphot.flux.densitydoublee_FluxSegVIS or NIR stack band source total flux (Kron aperture) (FLUXERR_SEGMENTATION)uJystat.errordoubleFluxDetTot? VIS or NIR stack band source total flux error (Kron aperture) (FLUX_DETECTION_TOTAL)uJyphot.flux.densitydoublenullablee_FluxDetTot? VIS or NIR stack band source segmented area flux (FLUXERR_DETECTION_TOTAL)uJystat.errordoublenullableFluxVisSer? VIS band source flux from the Sersic fit (FLUX_VIS_SERSIC)uJyphot.flux.density;em.optdoublenullableFluxYSer? NIR Y band source flux from the Sersic fit (FLUX_Y_SERSIC)uJyphot.flux.density;em.IR.JdoublenullableFluxJSer? NIR J band source flux from the Sersic fit (FLUX_J_SERSIC)uJyphot.flux.density;em.IR.JdoublenullableFluxHSer? NIR H band source flux from the Sersic fit (FLUX_H_SERSIC)uJyphot.flux.density;em.IR.Hdoublenullablee_FluxVisSer? VIS band source flux error from the Sersic fit (FLUXERR_VIS_SERSIC)uJystat.errordoublenullablee_FluxYSer? NIR Y band source flux error from the Sersic fit (FLUXERR_Y_SERSIC)uJystat.errordoublenullablee_FluxJSer? NIR J band source flux error from the Sersic fit (FLUXERR_J_SERSIC)uJystat.errordoublenullablee_FluxHSer? NIR H band source flux error from the Sersic fit (FLUXERR_H_SERSIC)uJystat.errordoublenullableFlagVis[0/10] Objects flag keeping track of the flagged pixels in the VIS flag image (FLAG_VIS)meta.codeintFlagY[0/10] Objects flag keeping track of the flagged pixels in the NIR Y flag image (FLAG_Y)meta.codeintFlagJ[0/10] Objects flag keeping track of the flagged pixels in the NIR J flag image (FLAG_J)meta.codeintFlagH[0/10] Objects flag keeping track of the flagged pixels in the NIR H flag image (FLAG_H)meta.codeintFlagNIR[0/10] Objects flag keeping track of the flagged pixels in the NIR stack flag image (FLAG_NIR_STACK)meta.codeintFlagDeblend[0/1] Flag marking if the object was originally blended with another one (DEBLENDED_FLAG)meta.codeintParentIDID of the parent sources of a deblended object (PARENT_ID)meta.id.parentintParentVisNIRID of the parent sources of a deblended object (PARENT_VISNIR)meta.id.parentintFlagPL[1]? Point-like flag (POINT_LIKE_FLAG) (1)meta.codeintnullablePPL? Probability between 0 and 1 that the source is point-like (POINT_LIKE_PROB) (2)stat.fit.goodnessdoublenullableFlagSpur[0/1] Spurious source flag (SPURIOUS_FLAG)meta.codeintPSpurProbability between 0 and 1 that the source is spurious (SPURIOUS_PROB)stat.fit.goodnessdoublemagSG? Magnitude used to compute POINT_LIKE_PROB (MAG_STARGAL_SEP)magphot.magdoublenullableFQualDetDetection step flags that could indicate the possible corruption of the MAG_STARGAL_SEP values (DET_QUALITY_FLAG)meta.code.qualintmuMax? Peak surface brightness above the background in the detection band (directly from SExtractor) (MU_MAX)mag.arcsec**-2phot.mag.sbdoublenullableDiffmu? The difference between MU_MAX and MAG_STARGAL_SEP; valid even for NIR-only sources (MUMAX_MINUS_MAG)mag.arcsec**-2phot.mag.sbdoublenullableSegAreaIsophotal area of the source above the analysis threshold (SExtractor ISOAREA_IMAGE) (SEGMENTATION_AREA)pixphys.angSizeintamajSemi-major axis of the source (from Asterism) (SEMIMAJOR_AXIS)pixphys.angSize;srcdoublePA[-90/90] Position angle (CCW/x) of the source (SExtractor THETA_IMAGE) (POSITION_ANGLE)degpos.posAngfloatEllA parametrization of how stretched an object is in the detection band (ELLIPTICITY) (3)src.ellipticitydoubleRadKron? Major semi-axis (in pixels) of the elliptical aperture used for total (Kron) aperture photometry on the detection image (KRON_RADIUS)pixphys.angSize;srcdoublenullableFWHMFWHM (in arcsec) used in a-phot to compute colors (FWHM) (4)arcsecphys.angSizedoubleE(B-V)Estimated galactic E(B-V) at the source centroid according to the reference Planck map (GAL_EBV)magphot.color;em.opt.B;em.opt.Vdoublee_E(B-V)Error on galactic E(B-V) according to the reference Planck map (GAL_EBV_ERR)magstat.errordoubleGaiaThe associated GAIA source id (GAIA_ID)meta.idQualGaia? The quality of the GAIA match (GAIA_MATCH_QUALITY)meta.code.qualdoublenullable