I/350ivo://CDS.VizieR/I/350doi:10.26093/cds/vizier.1350CDSGaia collaboration2024-02-23T10:39:48Z2022-01-18T10:25:10ZCDS support team

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

cds-question@unistra.frsurveysstandard-starsastrometryproper-motionsvisible-astronomyphotographic-photometryastronomical-object-identificationradial-velocityvariable-starsasteroidstrigonometric-parallaxGaia DR3 data (both Gaia EDR3 and the full Gaia DR3) are based on data collected between 25 July 2014 (10:30 UTC) and 28 May 2017 (08:44 UTC), spanning a period of 34 months. As a comparison, Gaia DR2 was based on 22 months of data and Gaia DR1 was based on observations collected during the first 14 months of Gaia's routine operational phase. Survey completeness: The Gaia EDR3 catalogue is essentially complete between G=12 and G=17. The source list for the release is incomplete at the bright end and has an ill-defined faint magnitude limit, which depends on celestial position. The combination of the Gaia scan law coverage and the filtering on data quality which will be done prior to the publication of Gaia EDR3, does lead to some regions of the sky displaying source density fluctuations that reflect the scan law pattern. In addition, small gaps exist in the source distribution, for instance close to bright stars. Astrometry: The parallax improvement is typically 20% with respect to Gaia DR2. The proper motions are typically a factor two better than in Gaia DR2. An overall reduction of systematics has been achieved. E.g., the parallax zero point deduced from the extragalactic sources is about -20{mu}as. A tentative correction formula for the parallax zero point will be provided. Closer to the release date of Gaia Early Data Release 3, an update will be given on the astrometry. Photometry: The G-band photometric uncertainties are ~0.25mmag for G<13, 1mmag at G=17, and 5mmag at G=20mag. The GBP-band photometric uncertainties are ~1mmag for G<13, 10mmag at G=17, and 100mmag at G=20mag. The GRP-band photometric uncertainties are ~1mmag for G<13, 5mmag at G=17, and 50mmag at G=20mag. Closer to the release date of Gaia Early Data Release 3, an update will be given on the photometry. Gaia EDR3 does not contain new radial velocities. The radial velocities of Gaia Data Release 2 have been added to Gaia EDR3 in order to ease the combination of spectrosopic and astrometric data. Radial velocities: Gaia EDR3 hence contains Gaia DR2 median radial velocities for about 7.21 million stars with a mean G magnitude between ~4 and ~13 and an effective temperature (Teff) in the range ~3550 to 6900K. The overall precision of the radial velocities at the bright end is of the order of ~200-300m/s while at the faint end, the overall precision is ~1.2km/s for a Teff of 4750K and ~3.5km/s for a Teff of 6500K. Before publication in Gaia EDR3, an additional filtering has been performed onto the Gaia DR2 radial velocities to remove some 4000 sources that had wrong radial velocities. Please be aware that the Gaia DR2 values are assigned to the Gaia EDR3 sources through an internal cross-match operation. In total, ~10000 Gaia DR2 radial velocities could not be associated to a Gaia EDR3 source. Astrophysical parameters: Gaia EDR3 does not contain new astrophysical parameters. Astrophysical parameters have been published in Gaia DR2 and a new set is expected to be released with the full Gaia DR3 release. Variable stars: Gaia EDR3 does not contain newly classified variable stars. For the overview of the currently available variable stars from Gaia DR2, have a look here. Classifications for a larger set of variable stars are expected with the full Gaia DR3 release. Solar system objects: A large set of solar system objects with orbits will become available with the full Gaia DR3 release. Information on the currently available asteroids in Gaia DR2 can be found here. Documentation: Data release documentation is provided along with each data release in the form of a downloadable PDF and a webpage. The various chapters of the documentation have been indexed at ADS allowing them to be cited. Please visit the Gaia Archive (https://gea.esac.esa.int/archive) to access this documentation, and make sure to check out all relevant information given through the documentation overview page (https://www.cosmos.esa.int/web/gaia-users/archive).2021A&A...649A...1Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/I/350CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)II/358 : SkyMapper Southern Sky Survey. DR1.1 (Wolf+, 2018)I/329 : URAT1 Catalog (Zacharias+ 2015)https://www.cosmos.esa.int/web/gaia/earlydr3 : Gaia EDR3 Home PageCitesGaia eDR3 at ESA: https://doi.org/10.5270/esa-1ugzkg7IsVariantFormOfGaia eDR3 at ESA: https://doi.org/10.5270/esa-1ugzkg7https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=I/350https://vizier.iucaa.in/viz-bin/VizieR-2?-source=I/350http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=I/350https://vizier.cds.unistra.fr/viz-bin/votable?-source=I/350https://vizier.iucaa.in/viz-bin/votable?-source=I/350http://vizieridia.saao.ac.za/viz-bin/votable?-source=I/350GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table I/350/gaiaedr3 (GaiaSource EDR3 data)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/350/gaiaedr3?https://vizier.iucaa.in/viz-bin/conesearch/I/350/gaiaedr3?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/350/gaiaedr3?GETtext/xml+votable180.050000true44.99615537864530.00561522634190.005555555555555556Hips catalogue for table I/350/gaiaedr3https://hipscat.cds.unistra.fr/HiPSCatService/I/350/gaiaedr3Cone search capability for table I/350/tyc2tdsc (Tycho-2 merged with the TDSC catalog and TDSC supplement)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/350/tyc2tdsc?https://vizier.iucaa.in/viz-bin/conesearch/I/350/tyc2tdsc?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/350/tyc2tdsc?GETtext/xml+votable180.050000true359.874322844.60131640.005555555555555556Cone search capability for table I/350/comscanl (*Representation of the Gaia scanning law over the 34 month time period covered by the Gaia Data Release 3)https://vizier.cds.unistra.fr/viz-bin/conesearch/I/350/comscanl?https://vizier.iucaa.in/viz-bin/conesearch/I/350/comscanl?http://vizieridia.saao.ac.za/viz-bin/conesearch/I/350/comscanl?GETtext/xml+votable180.050000true322.35782-27.504920.005555555555555556Gaia0/0-11 6/2.1064275164009164e-19 5.101838343667421e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/I/350?format=asciiOpticaldefaultI/350/gaiaedr3GaiaSource EDR3 dataRADEcor[-1/1] Correlation between right ascension and declination (ra_dec_corr)stat.correlationFG? Mean flux in the G-band (phot_g_mean_flux)phot.flux;em.optdoublenullableDE_ICRSBarycentric declination of the source (ICRS) at Ep=2016.0 (dec)degpos.eq.dec;meta.mainindexede_DE_ICRSStandard error of the declination of the source in ICRS at at Ep=2016.0 (dec_error)masstat.error;pos.eq.decfloatSourceUnique source identifier (unique within a particular Data Release) (source_id) (2)meta.id;meta.mainindexedSolIDSolution Identifier (solution_id) (3)meta.versionRandomIRandom index used to select subsets (random_index) (4)meta.codeindexedPlx? Absolute stellar parallax of the source at the Ep=2016.0 (parallax)maspos.parallax.trigdoublenullableindexede_Plx? Standard error of the stellar parallax at Ep=2016.0 (parallax_error)masstat.error;pos.parallax.trigfloatnullableindexedRPlx? Parallax divided by its standard error (parallax_over_error)stat.snr;pos.parallax.trigdoublenullableindexedPM? Total proper motion (pm) (6)mas/yrpos.pm;pos.eqdoublenullablepmRA? Proper motion in right ascension pmRA*cosDE of the source in ICRS at Ep=2016.0 (pmra) (7)mas/yrpos.pm;pos.eq.radoublenullableindexede_pmRA? Standard error of proper motion in right ascension direction (pmra_error) (8)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in declination direction (pmdec) (9)mas/yrpos.pm;pos.eq.decdoublenullableindexede_pmDE? Standard error of proper motion in declination direction (pmdec_error) (10)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableRAPlxcor[-1/1]? Correlation between right ascension and parallax (ra_parallax_corr)stat.correlationnullableRApmRAcor[-1/1]? Correlation between right ascension and proper motion in right ascension (ra_pmra_corr)stat.correlationnullableRApmDEcor[-1/1]? Correlation between right ascension and proper motion in declination (ra_pmdec_corr)stat.correlationnullableDEPlxcor[-1/1]? Correlation between declination and parallax (dec_parallax_corr)stat.correlationnullableDEpmRAcor[-1/1]? Correlation between declination and proper motion in right ascension (dec_pmra_corr)stat.correlationnullableDEpmDEcor[-1/1]? Correlation between declination and proper motion in declination (dec_pmdec_corr)stat.correlationnullablePlxpmRAcor[-1/1]? Correlation between parallax and proper motion in right ascension (parallax_pmra_corr)stat.correlationfloatnullablePlxpmDEcor[-1/1]? Correlation between parallax and proper motion in declination (parallax_pmdec_corr)stat.correlationfloatnullablepmRApmDEcor[-1/1]? Correlation between proper motion in right ascension and proper motion in declination (pmra_pmdec_corr)stat.correlationfloatnullableNALTotal number of observations AL (astrometric_n_obs_al) (11)meta.numberintNACTotal number of observations AC (astrometric_n_obs_ac) (12)meta.numberintNgALNumber of good observations AL (astrometric_n_good_obs_al) (13)meta.numberintEDR3NameUnique source designation (unique across all Data Releases) (designation) (1)meta.idcharRA_ICRSBarycentric right ascension of the source (ICRS) at Ep=2016.0 (ra)degpos.eq.ra;meta.mainindexede_RA_ICRSStandard error e_RA=e_RA*cosDE of the right ascension of the source in ICRS at Ep=2016.0 (ra_error)masstat.error;pos.eq.rafloatNbALNumber of bad observations AL (astrometric_n_bad_obs_al) (14)meta.numberintgofALGoodness of fit statistic of model wrt along-scan observations (astrometric_gof_al)stat.fit.goodnessdoublechi2ALAL chi-square value (astrometric_chi2_al) (15)stat.fit.chi2doubleAPFPrimary or secondary (astrometric_primary_flag) (19)meta.codeintnueff? Effective wavenumber of the source used in the astrometric solution (nu_eff_used_in_astrometry) (20)um**-1em.wavenumberfloatnullablepscol? Astrometrically estimated pseudocolour of the source (pseudocolour) (21)umem.wavenumberfloatnullablee_pscol? Standard error of the pseudocolour of the source (pseudocolour_error) (22)umstat.error;em.wavenumberfloatnullableRApscolCorr[-1/1]? Correlation between right ascension and pseudocolour (ra_pseudocolour_corr)stat.correlation;em.wavenumber;pos.eq.ranullableDEpscolCorr[-1/1]? Correlation between declination and pseudocolour (dec_pseudocolour_corr)stat.correlation;em.wavenumber;pos.eq.decnullablePlxpscolCorr[-1/1]? Correlation between parallax and pseudocolour (parallax_pseudocolour_corr)stat.correlation;em.wavenumber;pos.parallaxfloatnullableepsiExcess noise of the source (astrometric_excess_noise) (16)masstat.valuedoublesepsiSignificance of excess noise (astrometric_excess_noise_sig) (17)stat.valuedoubleSolvedWhich parameters have been solved for? (astrometric_params_solved) (18)meta.numberintpmRApscolCorr[-1/1]? Correlation between proper motion in right ascension and pseudocolour (pmra_pseudocolour_corr)stat.correlation;em.wavenumber;pos.pmfloatnullablepmDEpscolCorr[-1/1]? Correlation between proper motion in declination and pseudocolour (pmdec_pseudocolour_corr)stat.correlation;em.wavenumber;pos.pmfloatnullableMatchObsAMatched FOV transits used in the AGIS solution (astrometric_matched_transits) (23)meta.numberintNperNumber of visibility periods used in Astrometric solution (visibility_periods_used)meta.numberintamaxThe longest semi-major axis of the -5--10 error ellipsoid (astrometric_sigma5d_max) (24)masstat;pos.errorEllipsedoubleMatchObsThe total number of field-of-view transits matched to this source (matched_transits)meta.numberintNewMatchObsThe number of transits newly incorporated into an existing source in the current cycle (new_matched_transits) (25)meta.numberintMatchObsrmThe number of transits removed from an existing source in the current cycle (matched_transits_removed) (26)meta.numberintIPDgofhaAmplitude of the IPD GoF versus position angle of scan (ipd_gof_harmonic_amplitude) (27)stat.valuedoubleIPDgofhpPhase of the IPD GoF versus position angle of scan (ipd_gof_harmonic_phase) (28)degpos.posAng;stat.valuedoubleo_GmagNumber of observations (CCD transits) that contributed to the G mean flux and mean flux error (phot_g_n_obs)meta.numberinte_FG? Standard deviation of the G-band fluxes divided by sqrt(photGNObs) (phot_g_mean_flux_error)stat.error;phot.flux;em.optdoublenullableIPDfmpPercent of successful-IPD windows with more than one peak (ipd_frac_multi_peak) (29)stat.valueintIPDfowPercent of transits with truncated windows or multiple gate (ipd_frac_odd_win) (30)stat.valueintRUWE? Renormalised unit weight error (ruwe)stat.errordoublenullableSDSk1? Degree of concentration of scan directions across the source (scan_direction_strength_k1) (31)stat.valuedoublenullableSDSk2? Degree of concentration of scan directions across the source (scan_direction_strength_k2) (31)stat.valuedoublenullableSDSk3? Degree of concentration of scan directions across the source (scan_direction_strength_k3) (31)stat.valuedoublenullableSDSk4? Degree of concentration of scan directions across the source (scan_direction_strength_k4) (31)stat.valuedoublenullableSDMk1? Mean position angle of scan directions across the source (scan_direction_mean_k1) (32)degpos.posAng;stat.meandoublenullableSDMk2? Mean position angle of scan directions across the source (scan_direction_mean_k2) (32)degpos.posAng;stat.meandoublenullableSDMk3? Mean position angle of scan directions across the source (scan_direction_mean_k3) (32)degpos.posAng;stat.meandoublenullableSDMk4? Mean position angle of scan directions across the source (scan_direction_mean_k4) (32)degpos.posAng;stat.meandoublenullableDupSource with multiple source identifiers (duplicated_source) (33)meta.code.statusintRFG? Mean flux in the G-band divided by its error (phot_g_mean_flux_over_error)stat.snr;phot.flux;em.optdoublenullableGmag? G-band mean magnitude (Vega) (phot_g_mean_mag) (34)magphot.mag;em.optdoublenullableindexede_Gmag? Standard error of G-band mean magnitude (Vega) (added by CDS) (phot_g_mean_mag_error) (G1)magstat.error;phot.mag;stat.meandoublenullableo_BPmag? Number of observations contributing to BP photometry (phot_bp_n_obs) (35)meta.numberintnullableFBP? Mean flux in the integrated BP band (phot_bp_mean_flux)phot.flux;em.opt.BdoublenullableBP-RP? BP-RP colour (photBpMeanMag - photRpMeanMag) (bp_rp)magphot.color;em.opt.B;em.opt.Rdoublenullableindexede_FBP? Error on the integrated BP mean flux (phot_bp_mean_flux_error) (36)stat.error;phot.flux;em.opt.BdoublenullableRFBP? Integrated BP mean flux divided by its error (phot_bp_mean_flux_over_error) (37)stat.snr;phot.flux;em.opt.BdoublenullableBPmag? Integrated BP mean magnitude (Vega) (phot_bp_mean_mag) (38)magphot.mag;em.opt.Bdoublenullableindexede_BPmag? Standard error of BP mean magnitude (Vega) (added by CDS) (phot_bp_mean_mag_error) (G1)magstat.error;phot.mag;stat.meandoublenullableo_RPmagNumber of observations (CCD transits) that contributed to the integrated RP mean flux and mean flux error (phot_rp_n_obs)meta.numberintFRP? Mean flux in the integrated RP band (phot_rp_mean_flux)phot.flux;em.opt.Rdoublenullablee_FRP? Error on the integrated RP mean flux (phot_rp_mean_flux_error) (39)stat.error;phot.flux;em.opt.RdoublenullableRFRP? Integrated RP mean flux divided by its error (phot_rp_mean_flux_over_error) (40)stat.snr;phot.flux;em.opt.RdoublenullableRPmag? Integrated RP mean magnitude (Vega) (phot_rp_mean_mag) (41)magphot.mag;em.opt.Rdoublenullableindexede_RPmag? Standard error of RP mean magnitude (Vega) (added by CDS) (phot_rp_mean_mag_error) (G1)magstat.error;phot.mag;stat.meandoublenullableNBPcont? Number of BP contaminated transits (phot_bp_n_contaminated_transits) (42)meta.numberintnullableNBPblend? Number of BP blended transits (phot_bp_n_blended_transits) (43)meta.numberintnullableNRPcont? Number of RP contaminated transits (phot_rp_n_contaminated_transits) (44)meta.numberintnullableNRPblend? Number of RP blended transits (phot_rp_n_blended_transits) (45)meta.numberintnullableModePhotometry processing mode (phot_proc_mode)meta.codeintE(BP/RP)? BP/RP excess factor (phot_bp_rp_excess_factor)arith.factor;phot.flux;em.optfloatnullableBP-G? BP-G colour (photBpMeanMag - photGMeanMag) (bp_g)magphot.color;em.opt.B;em.optdoublenullableindexedG-RP? G-RP colour (photGMeanMag - photRpMeanMag) (g_rp)magphot.color;em.opt;em.opt.RdoublenullableindexedRVDR2? Radial velocity from Gaia DR2 (dr2_radial_velocity) (46)km/sspect.dopplerVeloc.opt;em.opt.Ifloatnullableindexede_RVDR2? Radial velocity error from Gaia DR2 (dr2_radial_velocity_error) (47)km/sstat.error;spect.dopplerVeloc.opt;em.opt.Ifloatnullableindexedo_RVDR2Number of transits used to compute radial velocity in Gaia DR2 (dr2_rv_nb_transits) (48)meta.numberintTefftemp? Teff of the template used to compute radial velocity in Gaia DR2 (dr2_rv_template_teff) (49)Kstat.fit.paramfloatnullableloggtemp? logg of the template used to compute radial velocity in Gaia DR2 (dr2_rv_template_logg) (50)log(cm.s**-2)stat.fit.paramfloatnullable[Fe/H]temp? [Fe/H] of the template used to compute radial velocity in Gaia DR2 (dr2_rv_template_fe_h) (51)stat.fit.paramfloatnullableGLONGalactic longitude (l) (52)degpos.galactic.lonindexedGLATGalactic latitude (b) (53)degpos.galactic.latdoubleindexedELONEcliptic longitude (ecl_lon)degpos.ecliptic.lonELATEcliptic latitude (ecl_lat) (54)degpos.ecliptic.latdoublePS1? Pan-STARRS1 cross-id name (panstarrs1) (55)meta.id.crossnullableSDSSDR13? SDSS DR13 cross-id name (sdssdr13) (55)meta.id.crossnullableSkyMapper2? SkyMapper2 cross-id name (skymapper2) (55)meta.id.crosslongnullableURAT1? URAT1 cross-id name (urat1) (55)meta.id.crosslongnullableGmagCorr? Calibration corrected G magnitude (added by CDS) (phot_g_mean_mag_corrected) (G2)magphot.mag;stat.mean;em.optdoublenullablee_GmagCorr? Standard error of calibration corrected G magnitude (added by CDS) (phot_g_mean_mag_error_corrected) (G2)magstat.errordoublenullableFGCorr? Calibration corrected G-band mean flux (added by CDS) (phot_g_mean_flux_corrected) (G2)magphot.flux;stat.mean;em.optdoublenullableE(BP/RP)Corr? Calibration corrected BP/RP excess factor (added by CDS) (phot_bp_rp_excess_factor_corrected) (G2)arith.factor;phot.flux;em.optfloatnullableRAJ2000Barycentric right ascension (ICRS) at Ep=2000.0 (added by CDS) (ra_epoch2000)degpos.eq.raindexede_RAJ2000Standard error of right ascension (e_RA*cosDE) (added by CDS) (ra_epoch2000_error)masstat.error;pos.eq.rafloatDEJ2000Barycentric declination (ICRS) at Ep=2000.0 (added by CDS) (dec_epoch2000)degpos.eq.decindexede_DEJ2000Standard error of declination (added by CDS) (dec_epoch2000_error)masstat.error;pos.eq.decfloatRADEcorJ2000[-1/1] Correlation between right ascension and declination at epoch 2000 (added by CDS) (ra_dec_epoch2000_corr)stat.correlation;pos.eq.ra;pos.eq.decEpochReference epoch (ref_epoch) (5)yrmeta.ref;time.epochfloatindexedI/350/agncridAGN cross-identifications (AgnCrossId.csv)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordNameSource name in the external catalog (source_name_in_catalogue)meta.id.crosscharSourceGaia source ID (source_id)meta.id;meta.mainindexedCatCatalog name (catalogue_name) (1)meta.datasetcharI/350/tyc2tdscTycho-2 merged with the TDSC catalog and TDSC supplemente_PA? Uncertainty of the position angle (e_pa)degstat.errorfloatnullableSep? Separation of the present component (cmp) with respect to the reference component (rcmp) (sep)arcsecpos.angDistancefloatnullablee_Sep? Uncertainty of the separation (e_sep)masstat.errorintnullablee_PA.Sep? Uncertainty of the position angle * separation (e_pa_sep)stat.errorintnullablepmDE? Proper motion in Declination (pm_de)mas/yrpos.pm;pos.eq.decfloatnullableindexede_pmDE? Uncertainty of proper motion in Dec (e_pm_de)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableEpRA1990Epoch-1990 of RAdeg (ep_ra1990)yrtime.epochfloatEpDE1990Epoch-1990 of DEdeg (ep_de1990)yrtime.epochfloatEpRAmdeg? Mean epoch of RAmdeg (ep_ra_m)yrtime.epochfloatnullableEpDEmdeg? Mean epoch of DEmdeg (ep_de_m)yrtime.epochfloatnullableNum? Number of positions used for forming mean data (num)meta.numberintnullableCorr? Correlation (RAdeg,DEdeg) (corr)stat.correlation;pos.eq.ra;pos.eq.decfloatnullableq_RAmdeg? Goodness of fit for mean RA (q_ra_mdeg)meta.code.qualfloatnullableq_DEmdeg? Goodness of fit for mean DE (q_de_mdeg)meta.code.qualfloatnullableq_pmDE? Goodness of fit for pmDe (q_pm_de)meta.code.qualfloatnullableq_pmRA? Goodness of fit for pmRa (q_pm_ra)meta.code.qualfloatnullablepflagMean position flag (pflag)meta.codecharposflgType of Tycho-2 solution (posflg)meta.id;stat.fitcharCCDMCCDM component identifier for HIP stars (ccdm)meta.code.multipchar_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.decindexedprox? Proximity indicator (prox)meta.codeintnullablecmpComponent designation (cmp)meta.id.partcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordHIP? Hipparcos number (hip)meta.id.crossintnullableindexedTYC1TYC1 component from TYC or GSC (tyc1)meta.id.part;meta.mainintTYC2TYC2 component from TYC or GSC (tyc2)meta.id.part;meta.mainintTYC3TYC2 component from TYC or GSC (tyc3)meta.id.part;meta.mainintTYCNumeric Tycho-2 identifier ((tyc1*1000000)+(tyc2*10)+(tyc3)) (id_tycho)meta.id;meta.datasetRATObserved Tycho-2 Right Ascension (ICRS) at epoch 1990+EpRA1990 (ra)degpos.eq.ra;meta.mainindexede_RATUncertainty RA*cos(dec), of observed Tycho-2 RA (e_ra_deg)masstat.errorfloatDETObserved Tycho-2 Declination (ICRS) at epoch 1990+EpDE1990 (dec)degpos.eq.dec;meta.mainindexede_DETUncertainty of observed Tycho-2 Dec (e_de_deg)masstat.errorfloatRAmdeg? Mean Right Ascension (ICRS) at Ep=J2000 (ra_mdeg)degpos.eq.ranullablee_RAmdeg? Uncertainty RA*cos(dec),at mean epoch (e_ra_mdeg)masstat.errorfloatnullableDEmdeg? Mean Declination (ICRS) at Ep=J2000 (de_mdeg)degpos.eq.decnullablee_DEmdeg? Uncertainty of Dec at mean epoch (e_de_mdeg)masstat.errorfloatnullablepmRA? Proper motion in right ascension, pmRA*cos(DE) (pm_ra)mas/yrpos.pm;pos.eq.rafloatnullableindexede_pmRA? Uncertainty proper motion in RA*cos(dec) (e_pm_ra)mas/yrstat.error;pos.pm;pos.eq.rafloatnullableIDTyc1Tycho-1 star (tyc)meta.codecharBTmag? Tycho-2 BT magnitude (bt_mag)magphot.mag;em.opt.Bfloatnullablee_BTmag? Uncertainty of BTmag (e_bt_mag)magstat.errorfloatnullableVTmag? Tycho-2 VT magnitude (vt_mag)magphot.mag;em.opt.Vfloatnullablee_VTmag? Uncertainty of VTmag (e_vt_mag)magstat.errorfloatnullableTDSC? TDSC identifier for the system (sys_no)meta.idintnullableindexedIDTyc2Tycho-2 identifier (TYC1-TYC2-TYC3) (id)meta.id;meta.maincharindexedNmain? Number of components in TDSC main catalogue (n_main)meta.numberintnullableNsup? Number of components in the TDSC supplement (n_sup)meta.numberintnullablemagflgTDSC photometry flag (magflg)meta.codecharWDSWDS identifier for the system (wds)meta.id.crosscharindexedNoteTDSC notes (note)meta.notecharHD? HD identifier for TDSC entries (hd)meta.id.crossintnullablercmpReference component for position angle and separation (rcmp)meta.id.assoccharPA? Position angle of the present component (cmp) with respect to the reference component (rcmp) (pa)degpos.posAngfloatnullableI/350/comscanl*Representation of the Gaia scanning law over the 34 month time period covered by the Gaia Data Release 3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordBJD-FOV1[1666.42/2704.38] Observation time for FOV1 Barycentric JD (in TCB) (BJD-2455197.5) (bjd_fov1) (2)dtime.epochdoubleBJD-FOV2[1666.42/2704.38] Observation time for FOV2 Barycentric JD (in TCB) (BJD-2455197.5) (bjd_fov2) (3)dtime.epochdoubleOBMTObservation time at Gaia converted to OBMT using the HATT (High Accuracy Time Transformation) (obmt_time)time.epochRA1FOV1 barycentric right ascension in ICRS at given time BJD-FOV1 (ra_fov1)degpos.eq.ra;meta.mainindexedDE1FOV1 barycentric declination in ICRS at given time BJD-FOV1 (dec_fov1)degpos.eq.dec;meta.mainindexedHP1[0/201326589] FOV1 HEALPix level 12 (heal_pix_fov1) (4)pos.healpixlongSA1[-180/180] FOV1 Scan position angle (scan_angle_fov1)pos.posAngdoubleRA2degFOV2 barycentric right ascension in ICRS at given time BJD-FOV2 (ra_fov2)degpos.eq.raDE2degFOV1 barycentric declination in ICRS at given time BJD-FOV2 (dec_fov2)degpos.eq.decHP2[56/201326571] FOV2 HEALPix level 12 (heal_pix_fov2) (4)pos.healpixlongSA2[-180/180] FOV2 Scan position angle (scan_angle_fov2)pos.posAngdoubleSolIDSolution ID (solution_id) (5)meta.versionJD[1666.42/2704.38] Julian date in TCB at Gaia (JD-2455197.5) (jd_time) (1)dtime.epochdoubleindexedI/350/framersSources used to compute the Gaia reference frame (FrameRotatorSource.csv)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordSourceGaia source ID (source_id)meta.id;meta.mainCRFO[False/True ] True if the source was a considered source for the reference frame orientation, false otherwise (considered_for_reference_frame_orientation)meta.codecharURFO[False/True ] True if the source was effectively used for the reference frame orientation, false otherwise (used_for_reference_frame_orientation)meta.codecharCRFF[False/True ] True if the source was a considered source for the reference frame spin determination, false otherwise (considered_for_reference_frame_spin)meta.codecharURFF[False/True ] True if the source was effectively used for the reference frame spin determination, false otherwise (used_for_reference_frame_spin)meta.codechar