J/A+A/692/A96ivo://CDS.VizieR/J/A+A/692/A96doi:10.26093/cds/vizier.36920096CDSLibralato M.Bedin L.R.Griggio M.Massari D.Anderson J.,Cuillandre J.-C.Ferguson A.M.N.Lancon A.Larsen S.S.Schirmer M.,Annibali F.Balbinot E.Dalessandro E.Erkal D.Kuzma P.B.,Saifollahi T.Verdoes Kleijn G.Kuemmel M.Nakajima R.Correnti M.,Battaglia G.Altieri B.Amara A.Andreon S.Baccigalupi C.Baldi M.,Balestra A.Bardelli S.Basset A.Battaglia P.Bonino D.Branchini E.,Brescia M.Brinchmann J.Caillat A.Camera S.Capobianco V.Carbone C.,Carretero J.Casas S.Castellano M.Castignani G.Cavuoti S.,Cimatti A.Colodro-Conde C.Congedo G.Conselice C.J.Conversi L.,Copin Y.Courbin F.Courtois H.M.Cropper M.Da Silva A.Degaudenzi H.,De Lucia G.Dinis J.Dubath F.Dupac X.Dusini S.Fabricius M.,Farina M.Farrens S.Faustini F.Ferriol S.Fosalba P.Frailis M.,Franceschi E.Fumana M.Galeotta S.Garilli B.George K.Gillard W.,Gillis B.Giocoli C.Gomez-Alvarez P.Grazian A.Grupp F.Guzzo L.,Haugan S.V.H.Hoar J.Hoekstra H.Holmes W.Hormuth F.Construes A.,Hudelot P.Jahnke K.Jhabvala M.Keihaenen E.Kermiche S.Kiessling A.,Kilbinger M.Kubik B.Kunz M.Kurki-Suonio H.Laureijs R.,Le Mignant D.Ligori S.Lilje P.B.Lindholm V.Lloro I.Maiorano E.,Mansutti O.Marggraf O.Markovic K.Martinelli M.Martinet N.,Marulli F.Massey R.Medinaceli E.Mei S.Melchior M.Mellier Y.,Meneghetti M.Merlin E.Meylan G.Moresco M.Moscardini L.Neissner C.,Nichol R.C.Niemi S.-M.Nightingale J.W.Padilla C.Paltani S.,Pasian F.Pedersen K.Percival W.J.Pettorino V.Pires S.Polenta G.,Poncet M.Popa L.A.Pozzetti L.Raison F.Rebolo R.Refregier A.,Renzi A.Rhodes J.Riccio G.Romelli E.Roncarelli M.Rossetti E.,Saglia R.Sakr Z.Sanchez A.G.Sapone D.Sartoris B.Sauvage M.,Schneider P.Schrabback T.Secroun A.Sefusatti E.Seidel G.,Seiffert M.Serrano S.Sirignano C.Sirri G.Skottfelt J.Stanco L.,Steinwagner J.Tallada-Crespi P.Taylor A.N.Teplitz H.I.Tereno I.,Toledo-Moreo R.Torradeflot F.Tsyganov A.Tutusaus I.Valenziano L.,Vassallo T.Veropalumbo A.Wang Y.Weller J.Zamorani G.Zucca E.,Burigana C.Scottez V.Scott D.Smart R.L.,2025-07-18T20:03:24Z2024-12-06T11:50:32ZCDS support team

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

cds-question@unistra.frsurveysglobular-star-clustersinfrared-photometryvisible-astronomyproper-motionsThe instruments at the focus of the Euclid space observatory offer superb, diffraction-limited imaging over an unprecedented (from space) wide field of view of 0.57 sq. deg. This exquisite image quality has the potential to produce high-precision astrometry for point sources once the undersampling of Euclid's cameras is taken into account by means of accurate, effective point spread function (ePSF) modelling. We present a complex, detailed workflow to simultaneously solve for the geometric distortion (GD) and model the undersampled ePSFs of the Euclid detectors. Our procedure was successfully developed and tested with data from the Early Release Observations (ERO) programme focused on the nearby globular cluster NGC 6397. Our final one-dimensional astrometric precision for a well-measured star just below saturation is 0.7mas (0.007pixel) for the Visible Instrument (VIS) and 3mas (0.01pixel) for the Near-Infrared Spectrometer and Photometer (NISP). Finally, we present a specific scientific application of this high-precision astrometry: the combination of Euclid and Gaia data to compute proper motions and study the internal kinematics of NGC 6397. Future work, when more data become available, will allow for a better characterisation of the ePSFs and GD corrections that are derived here, along with assessment of their temporal stability, and their dependencies on the spectral energy distribution of the sources as seen through the wide-band filters of Euclid.2024A&A...692A..96Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/692/A96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/490/777 : Abundances of Population II stars in NGC6397 (Lind+, 2008)J/A+A/503/545 : Equivalent widths of Li, Na, Fe, Ca in NGC6397 (Lind+, 2009)J/A+A/505/L13 : Lithium in globular NGC 6397 (Gonzalez Hernandez+, 2009)J/ApJ/709/241 : X-rays sources in NGC 6397 (Bogdanov+, 2010)J/A+A/527/A148 : NGC6397 red giants chemical composition (Lind+, 2011)J/ApJ/754/91 : Abundances and velocities of NGC 6397 stars (Lovisi+, 2012)J/A+A/588/A148 : NGC 6397 stars MUSE spectra (Husser+, 2016)J/MNRAS/468/2816 : NGC6397 low-mass variable stars (Martinazzi+, 2017)J/MNRAS/475/257 : AGB subpopulations in NGC 6397 (MacLean+, 2018)J/A+A/635/A161 : NGC6397 stars measured atmospheric parameters (Jain+, 2020)J/A+A/690/A371 : NGC 6121 and NGC 6397 JWST/NIRISS data (Libralato+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/692/A96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/692/A96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/692/A96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/692/A96https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/692/A96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/692/A96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/692/A96/ngc6397 (NGC 6397 astro-photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A96/ngc6397?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A96/ngc6397?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A96/ngc6397?GETtext/xml+votable180.050000true264.6190355573-54.05964776370.005555555555555556Cone search capability for table J/A+A/692/A96/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A96/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A96/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A96/list?GETtext/xml+votable180.050000true265.21701-53.715960.0055555555555555566/42073 42076-420771.1144155533189453e-19 1.8281296955425429e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/692/A96?format=asciiOpticalInfrareddefaultJ/A+A/692/A96/ngc6397NGC 6397 astro-photometric catalogIDvisID number of the source (IDvis)meta.id;meta.mainintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRA_ICRSRight Ascension (ICRS) at Ep=2023 (RAdeg)degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2023 (DEdeg)degpos.eq.dec;meta.mainindexedXIEVIS X master-frame position (Xvis)100mas/pixpos.cartesian.x;instr.detdoubleYIEVIS Y master-frame position (Yvis)100mas/pixpos.cartesian.y;instr.detdoubleIEmagCalibrated VIS I_E_ (550-900nm) magnitude (mvis) (1)magphot.mag;em.optfloate_XIEVIS X position rms (sxvis) (5)100mas/pixstat.errorfloate_YIEVIS Y position rms (syvis) (5)100mas/pixstat.errorfloate_IEmagVIS I_E_ magnitude rms (smvis) (5)magstat.error;phot.magfloat_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedq_IEmagVIS I_E_ quality-of-PSF-fit parameter (qvis) (5)meta.code.qualfloatnfIENumber of individual VIS I_E_ exposures in which an object was found (nfvis) (5)meta.numberintnuIENumber of individual VIS I_E_ exposures used to measure an object (nuvis) (5)meta.numberintXYENISP Y_E_ X master-frame position (xnispy) (6)300mas/pixpos.cartesian.x;instr.detdoubleYYENISP Y_E_ Y master-frame position (ynispy) (6)300mas/pixpos.cartesian.y;instr.detdoubleYEmag? Calibrated NISP Y_E_ (10866.24{AA}) magnitude (mnispy) (6) (2)magphot.mag;em.IR.Jfloatnullablee_XYE? NISP Y_E_ X position rms (sxnispy) (6) (5)300mas/pixstat.errorfloatnullablee_YYE? NISP Y_E_ Y position rms (synispy) (6) (5)300mas/pixstat.errorfloatnullablee_YEmag? NISP Y_E_ magnitude rms (smnispy) (6) (5)magstat.error;phot.magfloatnullableq_YEmag? NISP Y_E_ quality-of-PSF-fit parameter (qnispy) (6) (5)meta.code.qualfloatnullablenfYENumber of individual NISP Y_E_ exposures in which an object was found (nfnispy) (6) (5)meta.numberintnuYENumber of individual NISP Y_E_ exposures used to measure an object (nunispy) (6) (5)meta.numberintXJENISP J_E_ X master-frame position (xnispj) (6)300mas/pixpos.cartesian.x;instr.detdoubleYJENISP J_E_ X master-frame position (ynispj) (6)300mas/pixpos.cartesian.y;instr.detdoubleJEmag? Calibrated NISP J_E_ (13766.64{AA}) magnitude (mnispj) (6) (3)magphot.mag;em.IR.Jfloatnullablee_XJE? NISP J_E_ X position rms (sxnispj) (6) (5)300mas/pixstat.errorfloatnullablee_YJE? NISP J_E_ Y position rms (synispj) (6) (5)300mas/pixstat.errorfloatnullablee_JEmag? NISP J_E_ magnitude rms (smnispj) (6) (5)magstat.error;phot.magfloatnullableq_JEmag? NISP J_E_ quality-of-PSF-fit parameter (qnispj) (6) (5)meta.code.qualfloatnullablenfJENumber of individual NISP J_E_ exposures in which an object was found (nfnispj) (6)(5)meta.numberintnuJENumber of individual NISP J_E_ exposures used to measure an object (nunispj) (6)(5)meta.numberintXHENISP H_E_ X master-frame position (xnisph) (6)300mas/pixpos.cartesian.x;instr.detdoubleYHENISP H_E_ X master-frame position (ynisph) (6)300mas/pixpos.cartesian.y;instr.detdoubleHEmag? Calibrated NISP H_E_ (17825.15{AA}) magnitude (mnisph) (6) (4)magphot.mag;em.IR.Hfloatnullablee_XHE? NISP H_E_ X position rms (sxnisph) (6) (5)300mas/pixstat.errorfloatnullablee_YHE? NISP H_E_ Y position rms (synisph) (6) (5)300mas/pixstat.errorfloatnullablepmDEc? Proper motion along Declination corrected for the color-dependent systematic (pmDEc) (7)mas/yrpos.pm;pos.eq.decdoublenullablee_pmRAc? Error on the proper motion along RA*cos(DE) corrected for the color-dependent systematic (pmRAc) (7)mas/yrstat.error;pos.pm;pos.eq.radoublenullablee_HEmag? NISP H_E_ magnitude rms (smnisph) (6) (5)magstat.error;phot.magfloatnullableq_HEmag? NISP H_E_ quality-of-PSF-fit parameter (qnisph) (6) (5)meta.code.qualfloatnullablenfHENumber of individual NISP H_E_ exposures in which an object was found (nfnisph) (6)(5)meta.numberintnuHENumber of individual NISP H_E_ exposures used to measure an object (nunisph) (6)(5)meta.numberintpmRA? Proper motion along RA*cos(DE) (pmRA) (7)mas/yrpos.pm;pos.eq.radoublenullablepmDE? Proper motion along Decliantion (pmDE) (7)mas/yrpos.pm;pos.eq.decdoublenullablee_pmRA? Error on the proper motion along RA*cos(DE) (pmRA) (7)mas/yrstat.error;pos.pm;pos.eq.radoublenullablee_pmDE? Error on the proper motion along Declination (pmDE) (7)mas/yrstat.error;pos.pm;pos.eq.decdoublenullablepmRAc? Proper motion along RA*cos(DE) corrected for the color-dependent systematic (pmRAc) (7)mas/yrpos.pm;pos.eq.radoublenullablee_pmDEc? Error on the proper motion along Declination corrected for the color-dependent systematic (pmDEc) (7)mas/yrstat.error;pos.pm;pos.eq.decdoublenullableJ/A+A/692/A96/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainscaleScale of the imagearcsec/pixinstr.scalefloatNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar