Gaia DR3 (gaiadr3)

Description

The Gaia Early Data Release 3 (Gaia (E)DR3) enhances the DR2 catalogs by 118.79 million objects. It includes five-parameter astrometric solutions – positions on the sky, parallaxes, and proper motions – for more than 585 million sources, an additional pseudo-colour parameter for 800 million further sources (called six-parameter solution), and an additional 400 million sources with only positions, for a total of more than 1.8 billion sources with a mean G magnitude.

Additionally from the 13th of June 2022, the full Gaia DR3 adds radial velocities for more than 33 million sources (about 4 times more than Gaia DR2). Followed by about 200 millions BP/RP spectra and about 1 million high resolution spectra from the radial velocity spectrometer (RVS). Finally Gaia DR3 publish a huge catalog of objects classification of more than 1.59 billion sources, and a large variaty of smaller specifica catalogs like non-single stars, variable sources, galaxy and QSO candidates, solar system objects, and more.

The Gaia (E)DR3 release delivers an overall improvement in sky-coverage (almost complete down to 19 mag) and a great improvement in precision of both astrometric and photometric measurements.

Gaia (E)DR3 data is based on data collected between 25 July 2014 and 28 May 2017, spanning a period of 34 months of data collection. The reference epoch for Gaia DR3 (both Gaia EDR3 and the full Gaia DR3) is J2016.0. Positions and proper motions are referred to the ICRS, to which the optical reference frame defined by Gaia DR3 (Gaia-CRF3) is aligned. The time coordinate for Gaia DR3 results is the barycentric coordinate time (TCB).

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 (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.

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

Tables

• Gaia Source (gaiadr3.gaia_source)

  This table has an entry for every Gaia observed source as published with this data release. It contains the basic source parameters, in their final state as processed by the Gaia Data Processing and Analysis Consortium from the raw data coming from the spacecraft.

• Gaia Source (gaiadr3.gaia_source_lite)

  This table has an entry for every Gaia observed source as published with this data release. It contains the basic source parameters, in their final state as processed by the Gaia Data Processing and Analysis Consortium from the raw data coming from the spacecraft.

• DR2 Neighbourhood (gaiadr3.dr2_neighbourhood)

  This table provides the means to relate the astrophysical source identifier (source_id) from DR3 to DR2 via a precomputed crossmatch of such sources, taking into account the proper motions available at DR3.

• Astrophysical Parameters (gaiadr3.astrophysical_parameters)

  This is the main table containing the 1D astrophysical parameters produced by the Apsis processing chain developed in Gaia DPAC CU8 (see Chapter cu8par). Additional parameters can be found in table astrophysical_parameters_supp.

• Astrophysical Parameters supplement (gaiadr3.astrophysical_parameters_supp)

  This table contains additional parameters from the Apsis processing chain from modules that produce more than one result for a parameter.

• MCMC samples for GSP from Photometry (gaiadr3.mcmc_samples_gsp_phot)

  This table hosts Monte-Carlo Markov Chain (MCMC) samples for the posterior probability distribution of all parameters derived from the General Stellar Parametrizer from Photometry (GSP-Phot).

• MCMC samples for MSC (gaiadr3.mcmc_samples_msc)

  This table hosts Monte-Carlo Markov Chain (MCMC) samples for the posterior probability distribution of all parameters derived from the Multiple Source Classifier (MSC).

• Neurons information of the Self-Organized Map from OA module (gaiadr3.oa_neuron_information)

  This is the table hosting the content of a Self-Organized Map calculated from a dataset composed by outliers by the Apsis module OA.

• BP/RP spectrum prototypes (Xp Spectra) from Self-Organised-Map of OA module. (gaiadr3.oa_neuron_xp_spectra)

  This is the table hosting the prototype BP/RP spectrum corresponding to each of the neurons of the Self-Organised-Map produced by the Apsis module (OA).

• Total Galactic extinction Map (gaiadr3.total_galactic_extinction_map)

  This table provides the Total Galactic Extinction (TGE) map for extinction parameters A₀ describing the effective total Galactic extinction and related uncertainties at four separate HEALPix levels, namely levels 6 to 9.

• Optimized total galactic extinction map (gaiadr3.total_galactic_extinction_map_opt)

  This table provides an optimum version of the Total Galactic Extinction map, derived from the table total_galactic_extinction_map at a single HEALPix level 9.

• Auxiliary information about mean BP/RP spectra (gaiadr3.xp_summary)

  This tables contains auxiliary information about the mean BP/RP spectrum of a given source.

• Sampled BP/RP mean spectrum (gaiadr3.xp_sampled_mean_spectrum)

  This is the BP/RP externally calibrated sampled mean spectrum.

• Continuous BP/RP spectra (Xp Spectra) (gaiadr3.xp_continuous_mean_spectrum)

  Table hosting the mean BP and RP spectra based on the continuous representation in basis functions.

• Mean sampled Radial Velocity Spectrometer (RVS) Spectra (gaiadr3.rvs_mean_spectrum)

  This is the RVS mean sampled spectrum table. The spectra are in the rest frame, they are normalised and their wavelength grid ranges from 846 to 870 nm in steps of 0.01 nm (2401 elements).

• Epoch Photometry (gaiadr3.epoch_photometry)

  Epoch photometry. Each row in this table contains the light curve for a given object in bands G, BP and RP.

• Binary Masses (gaiadr3.binary_masses)

  Masses derived from the non-single stars (NSS) solutions with orbital parameters in table gaiadr3.nss_two_body_orbit.

• Chemical Cartography (gaiadr3.chemical_cartography)

  Orbital parameters, actions, Galactocentric Cartesian coordinates and velocities for the sample of stars used in the DR3 chemical cartographic study of the Milky Way.

• Gaia DR3 source IDs for carbon stars (gaiadr3.gold_sample_carbon_stars)

  List of Gaia DR3 source IDs for carbon stars extracted from the main list of candidate carbon stars for having C2 and CN molecular bands significantly stronger than usual M stars DR3-DPACP-123.

• Stellar astrophysical parameters of the golden sample of F, G, K, and M stars (gaiadr3.gold_sample_fgkm_stars)

  Stellar astrophysical parameters of the golden sample of F, G, K, and M stars from DR3-DPACP-123.

• Gaia DR3 source IDs of O, B, and A-type stars (gaiadr3.gold_sample_oba_stars)

  List of Gaia DR3 source IDs of O, B, and A-type stars having an effective temperature estimate greater than 7,500~K.

• Gaia DR3 source IDs of candidates for solar analogues (gaiadr3.gold_sample_solar_analogues)

  Gaia DR3 source IDs of candidates for solar analogues selected from GSP-Spec via effective temperature, surface gravity and metallicity and from FLAME via mass and radius.

• Recommended parameters for the Gaia Spectro-Photometric Standard stars (gaiadr3.gold_sample_spss)

  Recommended parameters for the Gaia Spectro-Photometric Standard stars (Pancino et al. 2021).

• Bolometric luminosities and radii in solar units for a subset of ultracool dwarfs (gaiadr3.gold_sample_ucd)

  The table contains the bolometric luminosities and radii in solar units for a subset of ultracool dwarfs from the Gaia DR3 catalogue.

• Orbital parameters and uncertainties (gaiadr3.sso_orbits)

  Orbital parameters and uncertainties computed from the sso_observation astrometric data.

• Gaia Synthetic Photometry Catalogue (GSPC) (gaiadr3.synthetic_photometry_gspc)

  This is a catalogue of synthetic photometry generated from the Gaia BP/RP mean spectra.

• QSO candidates (gaiadr3.qso_candidates)

  This table contains parameters derived from various modules dedicated to the classification and characterisation of sources considered as QSO candidates.

• QSO Catalogue name (gaiadr3.qso_catalogue_name)

  This table provides the list of input catalogues that have been used to select any given source for which morphological analysis parameters are provided in table qso_candidates.

• Galaxy Candidates (gaiadr3.galaxy_candidates)

  This table contains parameters derived from various modules dedicated to the classification and characterisation of sources considered as galaxy candidates.

• Galaxy Catalogue name (gaiadr3.galaxy_catalogue_name)

  This table provides the list of input catalogues that have been used to select any given source for which morphological analysis parameters are provided in table galaxy_candidates.

• Solar System Object observations (gaiadr3.sso_observation)

  Solar System object observations. Each table line contains data obtained during the transit of the source on a single CCD, during a single transit.

• Mean BP/RP reflectance spectra of Solar System Objects (SSO) (gaiadr3.sso_reflectance_spectrum)

  This table contains the mean BP/RP reflectance spectra of asteroids computed as the ratio between the asteroid flux and an averaged solar analogue flux.

• Solar System Object (SSO) sources (gaiadr3.sso_source)

  This table contains data related to Solar System objects observed by Gaia.

• NSS astrometric models with an acceleration solution (gaiadr3.nss_acceleration_astro)

  This table contains non-single-star (NSS) astrometric models for sources having a non-linear proper motion which is compatible with an acceleration solution.

• NSS orbital models compatible with a linear trend (gaiadr3.nss_non_linear_spectro)

  This table contains non-single-star (NSS) orbital models for spectroscopic binaries compatible with a trend.

• NSS orbital models compatible with two-body solution (gaiadr3.nss_two_body_orbit)

  This table contains non-single-star (NSS) orbital models for sources compatible with an orbital two-body solution.

• NSS models compatible with a VIM solution (gaiadr3.nss_vim_fl)

  This table contains non-single-star (NSS) models for sources compatible with an Variability Induced Mover (VIM) solution.

• Variable Sources: AGN (gaiadr3.vari_agn)

  This table provides information on AGN properties.

• Variable Sources: Cepheid stars (gaiadr3.vari_cepheid)

  This table describes the Cepheid stars.

• Variable Sources: Class Definitions (gaiadr3.vari_classifier_class_definition)

  Table with detailed descriptions of published classes for each classifier described in vari_classifier_definition and used in table vari_classifier_result.

• Variable Sources: Classifier Definitions (gaiadr3.vari_classifier_definition)

  Table with detailed descriptions of all classifiers used in table vari_classifier_result.

• Variable Sources: Classifier results (gaiadr3.vari_classifier_result)

  Table with variability classification results of all classifiers, which are identified by the classifier_name column.

• Variable Sources: Compact companions (gaiadr3.vari_compact_companion)

  This table describes the compact companion candidates.

• Variable Sources: Eclipsing Binaries (gaiadr3.vari_eclipsing_binary)

  This table describes the properties of the eclipsing binaries resulting from the variability analysis.

• Variable Sources: Epoch radial velocity (gaiadr3.vari_epoch_radial_velocity)

  This table contains the epoch radial velocity data points for a sub-set of variable stars. Each entry is a radial velocity in the solar barycentric reference frame for a given object and observation time.

• Variable Sources: Long Period Variable stars (gaiadr3.vari_long_period_variable)

  This table describes the Long Period Variable stars.Some entries can be NaN when absent.

• Variable Sources: Microlensing events (gaiadr3.vari_microlensing)

  This table describes the microlensing events.

• Variable Sources: MS oscillators (gaiadr3.vari_ms_oscillator)

  This table describes the main-sequence (MS) oscillators.

• Variable Sources: Planetary Transit candidate events (gaiadr3.vari_planetary_transit)

  This table describes the Planetary Transit candidate events.

• Variable Sources: Spurious Signals (gaiadr3.vari_spurious_signals)

  Several statistics which can help in the identification of sources that are affected by calibration issues.

• Variable Sources: Radial velocity time series (gaiadr3.vari_rad_vel_statistics)

  Statistical parameters of radial velocity time series, using only transits not rejected, see rejected_by_variability column in vari_epoch_radial_velocity.

• Variable Sources: Solar-like stars with rotational modulation (gaiadr3.vari_rotation_modulation)

  This table describes the solar-like stars with rotational modulation.

• Variable Sources: RR Lyrae stars (gaiadr3.vari_rrlyrae)

  This table describes the RR Lyrae stars.

• Variable Sources: Short-timescale sources (gaiadr3.vari_short_timescale)

  This table describes the short-timescale sources.

• Variable Sources: Summary (gaiadr3.vari_summary)

  Summary table that provides the information on where a source_id can be found in the different variability tables and statistical parameters of time series, using only transits not rejected.

• Commanded Scan Law (gaiadr3.commanded_scan_law)

  This table provides a representation of the Gaia scanning law over the 34 month time period covered by the Gaia Data Release 3 (from 2014-07-25 10:31:26 to 2017-05-28 08:46:29), including the Ecliptic Pole Scanning at the begin of the mission.

• Frame Rotator Source (gaiadr3.frame_rotator_source)

  Sources used to compute the Gaia reference frame.

• Alerts MixedIn Source ID (gaiadr3.alerts_mixedin_sourceids)

  Some photometric science alerts mix transits from their primary source and other sources in the catalogue.

• Gaia CRF3 cross-matches (gaiadr3.gaia_crf3_xm)

  This table contains the full cross-match information for the Gaia-CRF3 sources.

• Science Alerts (gaiadr3.science_alerts)

  Table containing all Gaia Photometric Science Alerts triggered in the period 25-07-2014 to 28-05-2017.

• Agn Cross Id (gaiadr3.agn_cross_id)

  Table agn_cross_id lists sources whose positions and proper motions define the celestial reference frame of Gaia catalogue.

• Tycho-2 TDSC Merge (gaiadr3.tycho2tdsc_merge)

  Tycho-2 merged with the TDSC catalog and TDSC supplement. The Tycho Double Star Catalogue, (TDSC, ) contains 98482 components of double and multiple systems processed in the Tycho-2 context.

• Hipparcos2 Best Neighbour (gaiadr3.hipparcos2_best_neighbour)

  Table hipparcos2_best_neighbour lists each matched external catalogue object with its best neighbour in Gaia.

• Hipparcos2 Neighbourhood (gaiadr3.hipparcos2_neighbourhood)

  Table hipparcos2_neighbourhood includes all good neighbours for each matched Hipparcos2 object.

• Tycho-2 TDSC Merge Best Neighbour (gaiadr3.tycho2tdsc_merge_best_neighbour)

  Table tycho2tdsc_merge_best_neighbour lists each matched external catalogue object with its best neighbour in Gaia.

• Tycho-2 TDSC Merge Neighbourhood (gaiadr3.tycho2tdsc_merge_neighbourhood)

  Table tycho2tdsc_merge_neighbourhood includes all good neighbours for each matched Tycho2tdscMerge object.

• Pan-STARRS1 Best Neighbour (gaiadr3.panstarrs1_best_neighbour)

  Table panstarrs1_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• Pan-STARRS1 Neighbourhood (gaiadr3.panstarrs1_neighbourhood)

  Table panstarrs1_neighbourhood includes all good neighbours for each matched Gaia object.

• Panstarrs1 Join (gaiadr3.panstarrs1_join)

  Convenience table to be used to join Pan-STARRS1 DR1.1 catalogue with the cross-match results. The table links the external catalogue original source_id (original_ext_source_id) to the corresponding additional numerical identifier (clean_panstarrs1_oid).

• SDSS DR13 Best Neighbour (gaiadr3.sdssdr13_best_neighbour)

  Table sdssdr13_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• SDSS DR13 Neighbourhood (gaiadr3.sdssdr13_neighbourhood)

  Table sdssdr13_neighbourhood includes all good neighbours for each matched Gaia object.

• SDSS DR13 Join (gaiadr3.sdssdr13_join)

  Convenience table to be used to join SDSS DR13 catalogue with the cross-match results. The table links the external catalogue original source_id (original_ext_source_id) to the corresponding additional numerical identifier (clean_sdssdr13_oid).

• SkyMapper DR2 Best Neighbour (gaiadr3.skymapperdr2_best_neighbour)

  Table skymapperdr2_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• SkyMapper DR2 Neighbourhood (gaiadr3.skymapperdr2_neighbourhood)

  Table skymapperdr2_neighbourhood includes all good neighbours for each matched Gaia object.

• SkyMapper DR2 Join (gaiadr3.skymapperdr2_join)

  Convenience table to be used to join the SkyMapper DR2 catalogue with the cross-match results. It lists all the SkyMapper DR2 sources which were used in the cross-match. See Chapter [chap:crossmatch] for more details on the catalogue.

• URAT-1 Best Neighbour (gaiadr3.urat1_best_neighbour)

  Table urat1_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• URAT-1 Neighbourhood (gaiadr3.urat1_neighbourhood)

  Table urat1_neighbourhood includes all good neighbours for each matched Gaia object.

• AllWISE Best Neighbour (gaiadr3.allwise_best_neighbour)

  Table allwise_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• AllWISE Neighbourhood (gaiadr3.allwise_neighbourhood)

  Table allwise_neighbourhood includes all good neighbours for each matched Gaia object.

• APASS DR9 Best Neighbour (gaiadr3.apassdr9_best_neighbour)

  Table apassdr9_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• APASS DR9 Neighbourhood (gaiadr3.apassdr9_neighbourhood)

  Table apassdr9_neighbourhood includes all good neighbours for each matched Gaia object.

• APASS DR9 Join (gaiadr3.apassdr9_join)

  Convenience table to be used to join the APASS DR9 catalogue with the cross-match results. The table links the external catalogue original source_id (original_ex_source_id) to the corresponding additional numerical identifier (clean_apassdr9_oid).

• GSC2.3 Best Neighbour (gaiadr3.gsc23_best_neighbour)

  Table gsc23_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• GSC2.3 Neighbourhood (gaiadr3.gsc23_neighbourhood)

  Table gsc23_neighbourhood includes all good neighbours for each matched Gaia object.

• GSC2.3 Join (gaiadr3.gsc23_join)

  Convenience table to be used to join the GSC 2.3 catalogue with cross-match results. The table links the external catalogue original sourceId (originalExtSourceId) to the corresponding additional numerical identifier (cleanGsc23Oid).

• RAVE DR5 Best Neighbour (gaiadr3.ravedr5_best_neighbour)

  Table ravedr5_best_neighbour lists each matched external catalogue object with its best neighbour in Gaia.

• RAVE DR5 Neighbourhood (gaiadr3.ravedr5_neighbourhood)

  Table ravedr5_neighbourhood includes all good neighbours for each matched RAVE DR5 object.

• RAVE DR5 Join (gaiadr3.ravedr5_join)

  Convenience table to be used to join RAVE DR5 catalogue with the cross-match results. The table links the external catalogue original sourceId (originalExtSourceId) to the corresponding additional numerical identifier (cleanRavedr5Oid).

• 2MASS PSC XSC Best Neighbour (gaiadr3.tmass_psc_xsc_best_neighbour)

  Table tmass_psc_xsc_best_neighbour lists each matched Gaia object with its best neighbour in the external catalogue.

• 2MASS PSC XSC Neighbourhood (gaiadr3.tmass_psc_xsc_neighbourhood)

  Table tmass_psc_xsc_neighbourhood includes all good neighbours for each matched Gaia object.

• 2MASS PSC XSC Join (gaiadr3.tmass_psc_xsc_join)

  Convenience table to be used to join 2MASS PSC+XSC catalogue with the cross-match results. The table links the external catalogue original sourceId (originalExtSourceId) to the corresponding additional numerical identifier (cleanTmassPscXscOid).

• RAVE DR6 best neighbour (gaiadr3.ravedr6_best_neighbour)

  Table Ravedr6BestNeighbour lists each matched external catalogue object with its best neighbour in Gaia.

• RAVE DR6 Neighbourhood (gaiadr3.ravedr6_neighbourhood)

  Table Ravedr6Neighbourhood includes all good neighbours for each matched RAVE DR6 object.

• RAVE DR6 Join (gaiadr3.ravedr6_join)

  Convenience table to be used to join RAVE DR6 catalogue with the cross-match results.

• Gaia Source Simulation (gaiadr3.gaia_source_simulation)

  Table of sources realised according to the Gaia Object Generator (GOG) simulation.

• Gaia Universe Model (gaiadr3.gaia_universe_model)

  Table of simulated galactic stars according to the Gaia Universal Model Simulation (GUMS).