tgas.mainivo://org.gavo.dc/tgas/q/mainThe GAVO DC teamGAIA Collaboration2016-09-07T00:00:00ZGAVO Data Centre Team

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gavo@ari.uni-heidelberg.de+49 6221 54 1837starssurveysastrometryproper-motions This table is a subset of GaiaSource comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution. All rows have Gaia solution id 1635378410781933568.https://dc.g-vo.org/tableinfo/tgas.mainIsServedByGAVO Data Center TAP servicehttp://dc.g-vo.org/taphttps://dc.g-vo.org/tap0/0-112.721e-19 4.138e-19Opticaltgas This table is a subset of GaiaSource comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution. All rows have Gaia solution id 1635378410781933568.tgas.main This table is a subset of GaiaSource comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution. All rows have Gaia solution id 1635378410781933568.2100000source_idUnique source identifiermeta.id;meta.main76278620747522.7821002160144275e+173.7237859862162985e+186.668831054679873e+1869175215372186086401.0longindexedprimaryraBarycentric Right Ascension in ICRS at ref_epochdegpos.eq.ra;meta.main0.00042866515.8353182.89345.9913601doubleindexednullabledecBarycentric Declination in ICRS at ref_epochdegpos.eq.dec;meta.main-89.8897-70.7701-4.7710469.730689.83231doubleindexednullablera_errorStandard error of ra (with cos δ applied).masstat.error;pos.eq.ra0.03532310.1218080.254141.0020419.06271floatnullabledec_errorStandard error of decmasstat.error;pos.eq.dec0.03801270.11230.2333840.93758318.52811floatnullablelGalactic longitude (converted from ra, dec)degpos.galactic.lon0.00036545915.1964197.07347.418359.9991doublenullablebGalactic latitude (converted from ra, dec)degpos.galactic.lat-89.7408-59.6663-0.98220158.064689.89971doublenullablepmraProper motion in right ascension of the source in ICRS at ref_epoch. This is the projection of the proper motion vector in the direction of increasing right ascension.mas/yrpos.pm;pos.eq.ra-3259.36-37.9827-1.8084235.32012890.431doublenullablepmdecProper motion in declination at ref_epoch.mas/yrpos.pm;pos.eq.dec-3159.34-44.9869-2.9297622.77361858.531doublenullablepmra_errorStandard error of pmramas/yrstat.error;pos.pm;pos.eq.ra0.01182640.07837151.133093.8722318.00841floatnullablepmdec_errorStandard error of pmdecmas/yrstat.error;pos.pm;pos.eq.dec0.01269480.06773680.8669483.2961518.85441floatnullableparallaxAbsolute barycentric stellar parallax of the source at the reference epoch ref_epochmaspos.parallax-24.820.201511.779848.26584295.8041floatnullableparallax_errorStandard error of parallaxmasstat.error;pos.parallax0.2039740.2273690.3219730.8624960.9999981floatnullablephot_g_mean_magMean magnitude in the G band. This is computed from the G-band mean flux applying the magnitude zero-point in the Vega scale.magphot.mag;em.opt;stat.mean4.395128.1807711.035312.376519.30791floatnullablephot_g_mean_fluxG-band mean flux as electrons per second.s**-1phot.flux;em.opt;stat.mean306.7361816836248778.66161e+062.83047e+081doublenullablephot_g_mean_flux_errorError on phot_g_mean_fluxs**-1stat.error;phot.flux;em.opt;stat.mean1.0490265.62561029.94103694.35696e+061floatnullablephot_g_n_obsNumber of observations contributing to G photometrymeta.number1150.0115.0269.018661.0shortnullablephot_variable_flagPhotometric variability flagmeta.code;src.varcharnullableref_epochReference epoch to which the astrometic source parameters are referred, expressed as a Julian Year in TCB.yrmeta.ref;time.epoch201520152015201520151doublenullableastrometric_delta_qHipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only)stat.value3.77047e-050.09693042.3578439.98120437.80.0456015floatnullableastrometric_excess_noiseExcess noise of the sourcemasstat.value00.2410380.4780171.289565.296921floatnullableastrometric_excess_noise_sigSignificance of excess noisestat.value058.6683220.2231067.431.02922e+241floatnullableastrometric_n_obs_acTotal number of observations ACmeta.number044.099.0252.018711.0shortastrometric_n_obs_alTotal number of observations ALmeta.number1244.099.0254.018781.0shortastrometric_n_bad_obs_acNumber of bad observations ACmeta.number00.04.012.01001.0shortastrometric_n_bad_obs_alNumber of bad observations ALmeta.number00.00.04.0701.0shortastrometric_n_good_obs_acNumber of good observations ACmeta.number042.096.0243.017911.0shortastrometric_n_good_obs_alNumber of good observations ALmeta.number1244.099.0252.018661.0shortastrometric_primary_flagOnly primary sources (for which this flag is True) contribute to the estimation of attitude, calibration, and global parameters. The estimation of source parameters is not affected by primariness.meta.code11.01.01.011.0shortmatched_observationsThe number of observations (detection transits) that have been matched to a given source during the last internal crossmatch revision.meta.number46.015.033.02231.0shortastrometric_priors_usedType of prior used in in the astrometric solution33.05.05.051.0shortnullableastrometric_relegation_factorRelegation factor of the source calculated as per Eq. (118) in 2012A&A...538A..78L used for the primary selection process.arith.factor12.449334.7074912.406950.00961floatnullableastrometric_weight_acMean astrometric weight of the sourcemas**-2stat.weight;stat.mean1.53261e-061.24645e-052.75841e-053.9385e-050.008712820.998931floatnullableastrometric_weight_alMean astrometric weight of the sourcemas**-2stat.weight;stat.mean0.0351490.5869194.1013814.6345205.4751floatnullableduplicated_sourceDuring data processing, this source happened to been duplicated and one source only has been kept.00.00.01.011.0shortra_dec_corrCorrelation between right ascension and declinationstat.correlation-0.999982-0.910318-0.02372160.91570.9999721floatnullablera_pmra_corrCorrelation between right ascension and proper motion in right ascensionstat.correlation-0.999882-0.974559-0.7062460.2889750.9979091floatnullablera_pmdec_corrCorrelation between right ascension and proper motion in declinationstat.correlation-0.999417-0.919702-0.00684510.9090370.9993831floatnullabledec_pmra_corrCorrelation between declination and proper motion in right ascensionstat.correlation-0.999119-0.8951080.0006947730.8852080.9992261floatnullabledec_pmdec_corrCorrelation between declination and proper motion in declinationstat.correlation-0.999646-0.951697-0.5853950.4865970.9987811floatnullablepmra_pmdec_corrCorrelation between proper motion in right ascension and proper motion in declinationstat.correlation-0.99975-0.962630.007280440.9632550.9997221floatnullablera_parallax_corrCorrelation between right ascension and parallaxstat.correlation-0.998476-0.901085-0.04409620.9056230.9977221floatnullabledec_parallax_corrCorrelation between declination and parallaxstat.correlation-0.996157-0.7410470.1620420.8685810.9979521floatnullableparallax_pmra_corrCorrelation between parallax and proper motion in right ascensionstat.correlation-0.99835-0.9443230.04760410.9379210.9987621floatnullableparallax_pmdec_corrCorrelation between parallax and proper motion in declinationstat.correlation-0.996898-0.913624-0.1604170.7864370.9962621floatnullablescan_direction_mean_k1Mean position angle of scan directions across the sourcedeg-180-165.847-77.5503163.398179.9991floatnullablescan_direction_strength_k1Degree of concentration of scan directions across the source0.0001913880.07712940.3532390.690190.9999851floatnullablescan_direction_mean_k2Mean position angle of scan directions across the sourcedeg-89.9998-82.7701-0.0097433782.680789.99991floatnullablescan_direction_strength_k2Degree of concentration of scan directions across the source9.12868e-050.07295880.3503220.7835670.9999421floatnullablescan_direction_mean_k3Mean position angle of scan directions across the sourcedeg-60-55.8162-7.7615155.644859.99991floatnullablescan_direction_strength_k3Degree of concentration of scan directions across the source0.0002512340.06138910.3211560.7130640.9998691floatnullablescan_direction_mean_k4Mean position angle of scan directions across the sourcedeg-45-43.74340.46108943.6762451floatnullablescan_direction_strength_k4Degree of concentration of scan directions across the source0.0003052650.09603290.515670.9561310.9999931floatnullablerandom_indexRandom index that can be used to deterministically select subsetsmeta.code061777.6599999999961028874.01995274.339999999920570491.0longhipHipparcos identifier13527.859999999999759238.5114982.069999999991204040.045601476intnullabletycho2_idTycho 2 identifiercharnullable