GAIA DR3 (gaia_dr3.source)

Description

(paragraph extracted from the DR3 Documentation release int/archive/documentation/GDR3/)

EXECUTIVE SUMMARY

The third Gaia data release, Gaia DR3, contains the astrometry and broad-band photometry already published as part of Gaia EDR3 and introduces a large variety of new data products:

  • A much expanded radial velocity survey, as well as magnitudes of sources in the GRVS band, and a spectral line broadening parameter vbroad;
  • Mean BP, RP, and RVS spectra for a large subset of sources;
  • A much expanded collection of variable sources, covering 24 variability types;
  • Photometric time series for all variable sources;
  • The Gaia Andromeda Photometric Survey which contains the photometric time series for all sources (variable and non-variable) in a 5.5 deg radius field around M31;
  • Object classification, including a self-organised map (SOM) of poorly classified sources;
  • Astrophysical parameters (APs) from mean BP/RP spectra, including Markov-Chain Monte Carlo (MCMC) samples;
  • Astrophysical parameters from mean RVS spectra;
  • Chemical abundances from mean RVS spectra;
  • Diffuse interstellar band parameters from mean RVS spectra;
  • Non-single star solutions;
  • QSO and galaxy candidates, including redshifts, QSO host detections, and QSO host and galaxy light profiles;
  • Solar system objects (SSO), including reflectance spectra derived from epoch BP/RP spectra;
  • Total galactic extinction maps at various HEALPix levels;
  • Archived photometric science alerts.

Reference

Find details about Gaia and its third data release on:

Attribution

If you have used Gaia DR3 data in your research from this site, please use the following acknowledgement:

This work has made use of data from the European Space Agency (ESA) mission Gaia https://www.cosmos.esa.int/gaia, processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://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.

Database access and other data services are provided by the Associação Laboratório Interinstitucional de e-Astronomia (LIneA) with the financial support from INCT do e-Universo (Processo n.º 465376/2014-2).

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 for use when selecting subsets
ref_epoch double meta.ref
time.epoch 		yr

Reference epoch
ra double pos.eq.ra
meta.main 		deg

Right ascension
ra_error float stat.error
pos.eq.ra 		mas

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

Declination
dec_error float stat.error
pos.eq.dec 		mas

Standard error of declination
parallax double pos.parallax.trig mas

Parallax
parallax_error float stat.error
pos.parallax.trig 		mas

Standard error of parallax
parallax_over_error float stat.snr
pos.parallax.trig

Parallax divided by its standard error
pm float pos.pm
pos.eq 		mas.yr**-1

Total proper motion
pmra double pos.pm
pos.eq.ra 		mas.yr**-1

Proper motion in right ascension direction
pmra_error float stat.error
pos.pm
pos.eq.ra 		mas.yr**-1

Standard error of proper motion in right ascension direction
pmdec double pos.pm
pos.eq.dec 		mas.yr**-1

Proper motion in declination direction
pmdec_error float stat.error
pos.pm
pos.eq.dec 		mas.yr**-1

Standard error of proper motion in declination direction
ra_dec_corr float stat.correlation

Correlation between right ascension and declination
ra_parallax_corr float stat.correlation

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 short meta.number

Total number of observations in the along-scan (AL) direction
astrometric_n_obs_ac short meta.number

Total number of observations in the across-scan (AC) direction
astrometric_n_good_obs_al short meta.number

Number of good observations in the along-scan (AL) direction
astrometric_n_bad_obs_al short meta.number

Number of bad observations in the along-scan (AL) direction
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 float stat.value mas

Excess noise of the source
astrometric_excess_noise_sig float 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
nu_eff_used_in_astrometry float em.wavenumber um**-1

Effective wavenumber of the source used in the astrometric solution
pseudocolour float em.wavenumber um**-1

Astrometrically estimated pseudocolour of the source
pseudocolour_error float stat.error
em.wavenumber 		um**-1

Standard error of the pseudocolour of the source
ra_pseudocolour_corr float stat.correlation
em.wavenumber
pos.eq.ra

Correlation between right ascension and pseudocolour
dec_pseudocolour_corr float stat.correlation
em.wavenumber
pos.eq.dec

Correlation between declination and pseudocolour
parallax_pseudocolour_corr float stat.correlation
em.wavenumber
pos.parallax

Correlation between parallax and pseudocolour
pmra_pseudocolour_corr float stat.correlation
em.wavenumber
pos.pm
pos.eq.ra

Correlation between proper motion in right asension and pseudocolour
pmdec_pseudocolour_corr float stat.correlation
em.wavenumber
pos.pm
pos.eq.dec

Correlation between proper motion in declination and pseudocolour
astrometric_matched_transits 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 stat
pos.errorEllipse 		mas

The longest semi-major axis of the 5-d error ellipsoid
matched_transits short meta.number

The number of transits matched to this source
new_matched_transits short meta.number

The number of transits newly incorporated into an existing source in the current cycle
matched_transits_removed short meta.number

The number of transits removed from an existing source in the current cycle
ipd_gof_harmonic_amplitude float stat.value

Amplitude of the IPD GoF versus position angle of scan
ipd_gof_harmonic_phase float pos.posAng
stat.value 		deg

Phase of the IPD GoF versus position angle of scan
ipd_frac_multi_peak short stat.value

Percent of successful-IPD windows with more than one peak
ipd_frac_odd_win short stat.value

Percent of transits with truncated windows or multiple gate
ruwe float stat.error

Renormalised unit weight error
scan_direction_strength_k1 float stat.value

Degree of concentration of scan directions across the source
scan_direction_strength_k2 float stat.value

Degree of concentration of scan directions across the source
scan_direction_strength_k3 float stat.value

Degree of concentration of scan directions across the source
scan_direction_strength_k4 float stat.value

Degree of concentration of scan directions across the source
scan_direction_mean_k1 float pos.posAng
stat.mean 		deg

Mean position angle of scan directions across the source
scan_direction_mean_k2 float pos.posAng
stat.mean 		deg

Mean position angle of scan directions across the source
scan_direction_mean_k3 float pos.posAng
stat.mean 		deg

Mean position angle of scan directions across the source
scan_direction_mean_k4 float pos.posAng
stat.mean 		deg

Mean position angle of scan directions across the source
duplicated_source boolean meta.code.status

Source with multiple source identifiers
phot_g_n_obs short meta.number

Number of observations contributing to G photometry
phot_g_mean_flux double phot.flux
em.opt 		"electron".s**-1

G-band mean flux
phot_g_mean_flux_error float stat.error
phot.flux
em.opt 		"electron".s**-1

Error on G-band mean flux
phot_g_mean_flux_over_error float stat.snr
phot.flux
em.opt

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

G-band mean magnitude
phot_bp_n_obs short meta.number

Number of observations contributing to BP photometry
phot_bp_mean_flux double phot.flux
em.opt.B 		"electron".s**-1

Integrated BP mean flux
phot_bp_mean_flux_error float stat.error
phot.flux
em.opt.B 		"electron".s**-1

Error on the integrated BP mean flux
phot_bp_mean_flux_over_error float stat.snr
phot.flux
em.opt.R

Integrated BP mean flux divided by its error
phot_bp_mean_mag float phot.mag
em.opt.R 		mag

Integrated BP mean magnitude
phot_rp_n_obs short meta.number

Number of observations contributing to RP photometry
phot_rp_mean_flux double phot.flux
em.opt.R 		"electron".s**-1

Integrated RP mean flux
phot_rp_mean_flux_error float stat.error
phot.flux
em.opt.R 		"electron".s**-1

Error on the integrated RP mean flux
phot_rp_mean_flux_over_error float stat.snr
phot.flux
em.opt.R

Integrated RP mean flux divided by its error
phot_rp_mean_mag float phot.mag
em.opt.R 		mag

Integrated RP mean magnitude
phot_bp_rp_excess_factor float arith.factor
phot.flux
em.opt

BP/RP excess factor
phot_bp_n_contaminated_transits short meta.number

Number of BP contaminated transits
phot_bp_n_blended_transits short meta.number

Number of BP blended transits
phot_rp_n_contaminated_transits short meta.number

Number of RP contaminated transits
phot_rp_n_blended_transits short meta.number

Number of RP blended transits
phot_proc_mode short meta.code

Photometry processing mode
bp_rp float phot.color
em.opt.B
em.opt.R 		mag

BP - RP colour
bp_g float phot.color
em.opt.B
em.opt 		mag

BP - G colour
g_rp float phot.color
em.opt
em.opt.R 		mag

G - RP colour
radial_velocity float spect.dopplerVeloc.opt
em.opt.I 		km.s**-1

Radial velocity
radial_velocity_error float stat.error
spect.dopplerVeloc.opt
em.opt.I 		km.s**-1

Missing description
rv_method_used short meta.code.class

Method used to obtain the radial velocity
rv_nb_transits short meta.number

Number of transits used to compute the radial velocity
rv_nb_deblended_transits short meta.number

Number of valid transits that have undergone deblending
rv_visibility_periods_used short meta.number

Number of visibility periods used to estimate the radial velocity
rv_expected_sig_to_noise float stat.snr

Expected signal to noise ratio in the combination of the spectra used to obtain the radial velocity
rv_renormalised_gof float stat.fit.goodness

Radial velocity renormalised goodness of fit
rv_chisq_pvalue float stat.fit.param

P-value for constancy based on a chi-squared criterion
rv_time_duration float time.duration d

Time coverage of the radial velocity time series
rv_amplitude_robust float stat.error
spect.dopplerVeloc.opt
em.opt.I 		km.s**-1

Total amplitude in the radial velocity time series after outlier removal
rv_template_teff float stat.fit.param K

Teff of the template used to compute the radial velocity
rv_template_logg float stat.fit.param log(cm.s**-2)

Logg of the template used to compute the radial velocity
rv_template_fe_h float stat.fit.param dex

[Fe/H] of the template used to compute the radial velocityy
rv_atm_param_origin short meta.code.class

Origin of the atmospheric parameters associated with the template
vbroad float spect.dopplerVeloc.opt
em.opt.I 		km.s**-1

Spectral line broadening parameter
vbroad_error float stat.error
spect.dopplerVeloc.opt
em.opt.I 		km.s**-1

Uncertainty on the spectral line broadening
vbroad_nb_transits short meta.number

Number of transits used to compute vbroad
grvs_mag float phot.mag
em.opt 		mag

Integrated GRVS magnitude
grvs_mag_error float stat.error
phot.mag
em.opt 		mag

GRVS magnitude uncertainty
grvs_mag_nb_transits short meta.number

Number of transits used to compute GRVS
rvs_spec_sig_to_noise float stat.snr

Signal to noise ratio in the mean RVS spectrum
phot_variable_flag char meta.code
src.var

Photometric variability flag
l double pos.galactic.lon deg

Galactic longitude
b double pos.galactic.lat deg

Galactic latitude
ecl_lon double pos.ecliptic.lon deg

Ecliptic longitude
ecl_lat double pos.ecliptic.lat deg

Ecliptic latitude
in_qso_candidates boolean meta.code.status

Flag indicating the availability of additional information in the QSO candidates table
in_galaxy_candidates boolean meta.code.status

Flag indicating the availability of additional information in the galaxy candidates table
non_single_star short meta.code.status

Flag indicating the availability of additional information in the various Non-Single Star tables
has_xp_continuous boolean meta.code.status

Flag indicating the availability of mean BP/RP spectrum in continuous representation for this source
has_xp_sampled boolean meta.code.status

Flag indicating the availability of mean BP/RP spectrum in sampled form for this source
has_rvs boolean meta.code.status

Flag indicating the availability of mean RVS spectrum for this source
has_epoch_photometry boolean meta.code.status

Flag indicating the availability of epoch photometry for this source
has_epoch_rv boolean meta.code.status

Flag indicating the availability of epoch radial velocity for this source
has_mcmc_gspphot boolean meta.code.status

Flag indicating the availability of GSP-Phot MCMC samples for this source
has_mcmc_msc boolean meta.code.status

Flag indicating the availability of MSC MCMC samples for this source
in_andromeda_survey boolean meta.code.status

Flag indicating that the source is present in the Gaia Andromeda Photometric Survey (GAPS)
classprob_dsc_combmod_quasar float stat.probability

Probability from DSC-Combmod of being a quasar (data used: BP/RP spectrum, photometry, astrometry)
classprob_dsc_combmod_galaxy float stat.probability

Probability from DSC-Combmod of being a galaxy (data used: BP/RP spectrum, photometry, astrometry)
classprob_dsc_combmod_star float stat.probability

Probability from DSC-Combmod of being a single star (but not a white dwarf) (data used: BP/RP spectrum, photometry, astrometry)
teff_gspphot float phys.temperature.effective K

Effective temperature from GSP-Phot Aeneas best library using BP/RP spectra
teff_gspphot_lower float phys.temperature.effective
stat.min 		K

Lower confidence level (16%) of effective temperature from GSP-Phot Aeneas best library using BP/RP spectra
teff_gspphot_upper float phys.temperature.effective
stat.max 		K

Upper confidence level (84%) of effective temperature from GSP-Phot Aeneas best library using BP/RP spectra
logg_gspphot float phys.gravity log(cm.s**-2)

Surface gravity from GSP-Phot Aeneas best library using BP/RP spectra
logg_gspphot_lower float phys.gravity
stat.min 		log(cm.s**-2)

Lower confidence level (16%) of surface gravity from GSP-Phot Aeneas best library using BP/RP spectra
logg_gspphot_upper float phys.gravity
stat.max 		log(cm.s**-2)

Upper confidence level (84%) of surface gravity from GSP-Phot Aeneas best library using BP/RP spectra
mh_gspphot float phys.abund.Z dex

Iron abundance from GSP-Phot Aeneas best library using BP/RP spectra
mh_gspphot_lower float phys.abund.Z
stat.min 		dex

Lower confidence level (16%) of iron abundance from GSP-Phot Aeneas best library using BP/RP spectra
mh_gspphot_upper float phys.abund.Z
stat.max 		dex

Upper confidence level (84%) of iron abundance from GSP-Phot Aeneas best library using BP/RP spectra
distance_gspphot float pos.distance
pos.eq 		pc

Distance from GSP-Phot Aeneas best library using BP/RP spectra
distance_gspphot_lower float pos.distance
pos.eq 		pc

Lower confidence level (16%) of distance from GSP-Phot Aeneas best library using BP/RP spectra
distance_gspphot_upper float pos.distance
pos.eq 		pc

Upper confidence level (84%) of distance from GSP-Phot Aeneas best library using BP/RP spectra
azero_gspphot float phys.absorption
em.opt 		mag

Monochromatic extinction A_0, at 541.4 nm from GSP-Phot Aeneas best library using BP/RP spectra
azero_gspphot_lower float phys.absorption
em.opt 		mag

Lower confidence level (16%) of monochromatic extinction A_0 at 541.4 nm from GSP-Phot Aeneas best library using BP/RP spectra
azero_gspphot_upper float phys.absorption
em.opt 		mag

Upper confidence level (84%) of monochromatic extinction A_0 at 541.4 nm from GSP-Phot Aeneas best library using BP/RP spectra
ag_gspphot float phys.absorption
em.opt 		mag

Extinction in G band from GSP-Phot Aeneas best library using BP/RP spectra
ag_gspphot_lower float phys.absorption
em.opt 		mag

Lower confidence level (16%) of extinction in G band from GSP-Phot Aeneas best library using BP/RP spectra
ag_gspphot_upper float phys.absorption
em.opt 		mag

Upper confidence level (84%) of extinction in G band from GSP-Phot Aeneas best library using BP/RP spectra
ebpminrp_gspphot float phot.color.excess mag

Reddening E(GBP - GRP ) from GSP-Phot Aeneas best library using BP/RP spectra
ebpminrp_gspphot_lower float phot.color.excess
stat.min 		mag

Lower confidence level (16%) of reddening E(GBP - GRP ) from GSP-Phot Aeneas best library using BP/RP spectra
ebpminrp_gspphot_upper float phot.color.excess
stat.max 		mag

Upper confidence level (84%) of reddening E(GBP - GRP ) from GSP-Phot Aeneas best library using BP/RP spectra
libname_gspphot char meta.note

Name of library that achieves the highest mean log-posterior in MCMC samples and was used to derive GSP-Phot parameters in this table