gdr1.gaia_source

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.<\p>

Columns

Name Type UCD Unit Description
solution_id long meta.id
meta.version
Solution Identifier
source_id long meta.id
meta.main
Unique source identifier
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
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 Correlation between right ascension and declination
ra_parallax_corr float -1 float Correlation between right ascension and parallax
ra_pmra_corr float stat.correlation Correlation between right ascension and proper motion in right ascension
ra_pmdec_corr float stat.correlation Correlation between right ascension and proper motion in declination
dec_parallax_corr float stat.correlation Correlation between declination and parallax
dec_pmra_corr float stat.correlation Correlation between declination and proper motion in right ascension
dec_pmdec_corr float stat.correlation Correlation between declination and proper motion in declination
parallax_pmra_corr float stat.correlation Correlation between parallax and proper motion in right ascension
parallax_pmdec_corr float stat.correlation Correlation between parallax and proper motion in declination
pmra_pmdec_corr float stat.correlation 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_good_obs_ac int meta.number Number of good observations AC
astrometric_n_bad_obs_ac int meta.number Number of bad observations AC
astrometric_n_bad_obs_al int meta.number Number of bad observations AL
astrometric_delta_q float stat.value Hipparcos/Gaia data discrepancy (Hipparcos subset of TGAS only)
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_primary_flag unsignedByte meta.code Primary or seconday
astrometric_relegation_factor float arith.factor Relegation factor
astrometric_weight_al float stat.weight
stat.mean
Angle[mas^-2] Mean astrometric weight of the source
astrometric_weight_ac float stat.weight
stat.mean
Angle[mas^-2] Mean astrometric weight of the source
astrometric_priors_used int Type of prior used in the astrometric solution
matched_observations short meta.number Amount of observations matched to this source
duplicated_source unsignedByte Source with duplicate sources
scan_direction_strength_k1 float Degree of concentration of scan directions across the source
scan_direction_strength_k2 float Degree of concentration of scan directions across the source
scan_direction_strength_k3 float Degree of concentration of scan directions across the source
scan_direction_strength_k4 float Degree of concentration of scan directions across the source
scan_direction_mean_k1 float Angle[deg] Mean position angle of scan directions across the source
scan_direction_mean_k2 float Angle[deg] Mean position angle of scan directions across the source
scan_direction_mean_k3 float Angle[deg] Mean position angle of scan directions across the source
scan_direction_mean_k4 float Angle[deg] Mean position angle of scan directions across the source
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_mag double phot.mag
stat.mean
em.opt
Magnitude[mag] G-band mean magnitude
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
pos spoint Spherical point computed from right ascension and declination