Gaia Source (gaiadr2.gaia_source)

The table has 1692919135 rows, 95 columns.

Description

This table has an entry for every Gaia observed source as listed in the Main Database accumulating catalogue version from which the catalogue release has been generated. It contains the basic source parameters, that is only final data (no epoch data) and no spectra (neither final nor epoch).

Attribution

If you have used Gaia data in your research, please use the following acknowledgement:

This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.

More information can be found on the credit and citation instructions page.

Columns

Name Type UCD Unit Description
solution_id long meta.version

Solution Identifier
designation char meta.id
meta.main

Unique source designation (unique across all Data Releases)
source_id long meta.id
meta.main
meta.ref

Unique source identifier (unique within a particular Data Release)
random_index long meta.code

Random index used to select subsets
ref_epoch double meta.ref
time.epoch 		Time[Julian Years]

Reference epoch
ra double pos.eq.ra
meta.main 		Angle[deg]

Right ascension
ra_error double stat.error
pos.eq.ra 		Angle[mas]

Standard error of right ascension
dec double pos.eq.dec
meta.main 		Angle[deg]

Declination
dec_error double stat.error
pos.eq.dec 		Angle[mas]

Standard error of declination
parallax double pos.parallax Angle[mas]

Parallax
parallax_error double stat.error
pos.parallax 		Angle[mas]

Standard error of parallax
parallax_over_error float arith.ratio

Parallax divided by its error
pmra double pos.pm
pos.eq.ra 		Angular Velocity[mas/year]

Proper motion in right ascension direction
pmra_error double stat.error
pos.pm
pos.eq.ra 		Angular Velocity[mas/year]

Standard error of proper motion in right ascension direction
pmdec double pos.pm
pos.eq.dec 		Angular Velocity[mas/year]

Proper motion in declination direction
pmdec_error double stat.error
pos.pm
pos.eq.dec 		Angular Velocity[mas/year]

Standard error of proper motion in declination direction
ra_dec_corr float stat.correlation
pos.eq.ra
pos.eq.dec

Correlation between right ascension and declination
ra_parallax_corr float stat.correlation
pos.eq.ra
pos.parallax

Correlation between right ascension and parallax
ra_pmra_corr float stat.correlation
pos.eq.ra
pos.pm
pos.eq.ra

Correlation between right ascension and proper motion in right ascension
ra_pmdec_corr float stat.correlation
pos.eq.ra
pos.pm
pos.eq.dec

Correlation between right ascension and proper motion in declination
dec_parallax_corr float stat.correlation
pos.eq.dec
pos.parallax

Correlation between declination and parallax
dec_pmra_corr float stat.correlation
pos.eq.dec
pos.pm
pos.eq.ra

Correlation between declination and proper motion in right ascension
dec_pmdec_corr float stat.correlation
pos.eq.dec
pos.pm
pos.eq.dec

Correlation between declination and proper motion in declination
parallax_pmra_corr float stat.correlation
pos.parallax
pos.pm
pos.eq.ra

Correlation between parallax and proper motion in right ascension
parallax_pmdec_corr float stat.correlation
pos.parallax
pos.pm
pos.eq.dec

Correlation between parallax and proper motion in declination
pmra_pmdec_corr float stat.correlation
pos.pm
pos.eq.ra
pos.pm
pos.eq.dec

Correlation between proper motion in right ascension and proper motion in declination
astrometric_n_obs_al int meta.number

Total number of observations AL
astrometric_n_obs_ac int meta.number

Total number of observations AC
astrometric_n_good_obs_al int meta.number

Number of good observations AL
astrometric_n_bad_obs_al int meta.number

Number of bad observations AL
astrometric_gof_al float stat.fit.goodness

Goodness of fit statistic of model wrt along-scan observations
astrometric_chi2_al float stat.fit.chi2

AL chi-square value
astrometric_excess_noise double stat.value Angle[mas]

Excess noise of the source
astrometric_excess_noise_sig double stat.value

Significance of excess noise
astrometric_params_solved short meta.number

Which parameters have been solved for?
astrometric_primary_flag boolean meta.code

Primary or seconday
astrometric_weight_al float stat.weight
stat.mean 		Angle[mas^-2]

Mean astrometric weight of the source
astrometric_pseudo_colour double em.wavenumber Misc[um^-1]

Astrometrically determined pseudocolour of the source
astrometric_pseudo_colour_error double em.wavenumber
stat.error 		Misc[um^-1]

Standard error of the pseudocolour of the source
mean_varpi_factor_al float arith.factor
pos.parallax

Mean Parallax factor AL
astrometric_matched_observations short meta.number

Matched FOV transits used in the AGIS solution
visibility_periods_used short meta.number

Number of visibility periods used in Astrometric solution
astrometric_sigma5d_max float pos.errorEllipse
stat.max 		Angle[mas]

The longest semi-major axis of the 5-d error ellipsoid
frame_rotator_object_type int meta.code

The type of the source mainly used for frame rotation
matched_observations short meta.number

Amount of observations matched to this source
duplicated_source boolean meta.code.status

Source with duplicate sources
phot_g_n_obs int meta.number

Number of observations contributing to G photometry
phot_g_mean_flux double phot.flux
stat.mean
em.opt 		Flux[e-/s]

G-band mean flux
phot_g_mean_flux_error double stat.error
phot.flux
stat.mean
em.opt 		Flux[e-/s]

Error on G-band mean flux
phot_g_mean_flux_over_error float arith.ratio

G-band mean flux divided by its error
phot_g_mean_mag float phot.mag
stat.mean
em.opt 		Magnitude[mag]

G-band mean magnitude
phot_bp_n_obs int meta.number

Number of observations contributing to BP photometry
phot_bp_mean_flux double phot.flux
stat.mean 		Flux[e-/s]

Integrated BP mean flux
phot_bp_mean_flux_error double stat.error
phot.flux
stat.mean 		Flux[e-/s]

Error on the integrated BP mean flux
phot_bp_mean_flux_over_error float arith.ratio

Integrated BP mean flux divided by its error
phot_bp_mean_mag float phot.mag
stat.mean 		Magnitude[mag]

Integrated BP mean magnitude
phot_rp_n_obs int meta.number

Number of observations contributing to RP photometry
phot_rp_mean_flux double phot.flux
stat.mean 		Flux[e-/s]

Integrated RP mean flux
phot_rp_mean_flux_error double stat.error
phot.flux 		Flux[e-/s]

Error on the integrated RP mean flux
phot_rp_mean_flux_over_error float arith.ratio

Integrated RP mean flux divided by its error
phot_rp_mean_mag float phot.mag
stat.mean 		Magnitude[mag]

Integrated RP mean magnitude
phot_bp_rp_excess_factor float

BP/RP excess factor
phot_proc_mode short

Photometry processing mode
bp_rp float phot.color Magnitude[mag]

BP - RP colour
bp_g float phot.color Magnitude[mag]

BP - G colour
g_rp float phot.color Magnitude[mag]

G - RP colour
radial_velocity double spect.dopplerVeloc.opt Velocity[km/s]

Radial velocity
radial_velocity_error double stat.error
spect.dopplerVeloc.opt 		Velocity[km/s]

Radial velocity error
rv_nb_transits int meta.number

Number of transits used to compute radial velocity
rv_template_teff float stat.fit.param Temperature[K]

Teff of the template used to compute radial velocity
rv_template_logg float stat.fit.param GravitySurface[log cgs]

logg of the template used to compute radial velocity
rv_template_fe_h float stat.fit.param Abundances[dex]

Fe/H of the template used to compute radial velocity
phot_variable_flag char meta.code
src.var

Photometric variability flag
l double pos.galactic.lon Angle[deg]

Galactic longitude
b double pos.galactic.lat Angle[deg]

Galactic latitude
ecl_lon double pos.ecliptic.lon Angle[deg]

Ecliptic longitude
ecl_lat double pos.ecliptic.lat Angle[deg]

Ecliptic latitude
priam_flags long meta.code

flags for the Apsis-Priam results
teff_val float phys.temperature.effective Temperature[K]

stellar effective temperature
teff_percentile_lower float phys.temperature.effective
stat.min 		Temperature[K]

teffVal lower uncertainty
teff_percentile_upper float phys.temperature.effective
stat.max 		Temperature[K]

teffVal upper uncertainty
a_g_val float phys.absorption.gal Magnitude[mag]

line-of-sight extinction in the G band, A_G)
a_g_percentile_lower float phys.absorption.gal
stat.min 		Magnitude[mag]

aGVal lower uncertainty
a_g_percentile_upper float phys.absorption.gal
stat.max 		Magnitude[mag]

aGVal upper uncertainty
e_bp_min_rp_val float Magnitude[mag]

line-of-sight reddening E(BP-RP)
e_bp_min_rp_percentile_lower float Magnitude[mag]

eBPminRPVal lower uncertainty
e_bp_min_rp_percentile_upper float Magnitude[mag]

eBPminRPVal upper uncertainty
flame_flags long meta.code

Flags for the Apsis-FLAME results
radius_val float phys.size.radius Length & Distance[Solar Radius]

stellar radius
radius_percentile_lower float phys.size.radius
stat.error 		Length & Distance[Solar Radius]

radiusVal lower uncertainty
radius_percentile_upper float phys.size.radius
stat.error 		Length & Distance[Solar Radius]

radiusVal upper uncertainty
lum_val float phys.luminosity Luminosity[Solar Luminosity]

stellar luminosity
lum_percentile_lower float phys.luminosity
stat.error 		Luminosity[Solar Luminosity]

lumVal lower uncertainty
lum_percentile_upper float phys.luminosity
stat.error 		Luminosity[Solar Luminosity]

lumVal upper uncertainty
pos char pos.eq.ra, pos.eq.dec Angle[rad], Angle[rad]

The point position of a source (ra, dec) in radian.