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Table: gaia_dr3.galaxy_candidates
(The bold columns are indexed columns)
Column NameDescriptionDatatype
classlabel_dscClass assigned by DSC based on the probability from its Combmod classifierCHAR
classlabel_dsc_jointClass assigned by DSC based on the probability from its Specmod and Allosmod classifiersCHAR
classlabel_oaClass label of the neuron that represents the source, as assigned by the OA module in ApsisCHAR
classprob_dsc_combmod_galaxyProbability from DSC-Combmod of being a galaxy (data used: BP/RP spectrum, photometry, astrometry)DOUBLE
classprob_dsc_combmod_quasarProbability from DSC-Combmod of being a quasar (data used: BP/RP spectrum, photometry, astrometry)DOUBLE
ellipticity_de_vaucouleursEllipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the de Vaucouleurs profile.REAL
ellipticity_de_vaucouleurs_errorUncertainty in the ellipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the de Vaucouleurs profile.REAL
ellipticity_sersicEllipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the Sersic profile.REAL
ellipticity_sersic_errorUncertainty in the ellipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the Sersic profile.REAL
flags_de_vaucouleursThis flag provides information about the processing or scientific quality of the results of the Galaxy morphology analysis chain for the source of interest for the de Vaucouleurs Profile.REAL
flags_sersicFlag indicative of processing or scientific quality for the morphological parameters fitting for the Sersic ProfileREAL
intensity_de_vaucouleursIntensity of the source at the fitted effective radius (radius_de_vaucouleurs) for the de Vaucouleurs profile.DOUBLE
intensity_de_vaucouleurs_errorUncertainty of the light intensity at the fitted effective radius (radius_de_vaucouleurs) of the source for the de Vaucouleurs profile.DOUBLE
intensity_sersicIntensity of the source at the fitted effective radius (radius_sersic) for the Sersic profile.DOUBLE
intensity_sersic_errorUncertainty of the light intensity at the fitted effective radius (radius_sersic) of the source for the Sersic profile.DOUBLE
l2_de_vaucouleursThis value represents the mean squared error between the integrated flux of all observed samples (from the Sky Mapper and Astrometric Field) and the integrated flux of synthetic samples produced with the fitted profile.DOUBLE
l2_sersicThis value represents the mean squared error between the integrated flux of all observed samples (from the Sky Mapper and Astrometric Field) and the integrated flux of synthetic samples produced with the fitted profile.DOUBLE
morph_params_corr_vec_de_vaucouleursVector form of the upper triangle of the correlation matrix for the fitted parameters for the de Vaucouleurs ProfileCHAR
morph_params_corr_vec_sersicVector form of the upper triangle of the correlation matrix for the fitted parameters for the Sersic ProfileCHAR
n_sersicSersic index for the Sersic profile. The Sersic profile is a mathematical function that describes how the intensity of a galaxy varies with the distance from its center. The Sersic index describes how steep this variation is.DOUBLE
n_sersic_errorUncertainty in the Sersic index for the Sersic profile.DOUBLE
n_transitsThe number of transits used to reconstruct the image and to analyse the object morphologySMALLINT
posangle_de_vaucouleursPosition angle of the source for fitted de Vaucouleurs profile with respect to Celestial North Pole.REAL
posangle_de_vaucouleurs_errorUncertainty in the position angle of source with respect to Celestial North Pole for the de Vaucouleurs profile.REAL
posangle_sersicPosition angle of the source for fitted Sersic profile with respect to Celestial North PoleREAL
posangle_sersic_errorUncertainty in the position angle of source with respect to Celestial North Pole for the Sersic profile.REAL
radius_de_vaucouleursEffective radius containing half of the total luminosity of the source bulge as obtained by morphological fitting for the de Vaucouleurs profile.DOUBLE
radius_de_vaucouleurs_errorUncertainty in the effective radius containing half of the total luminosity of the source for the de Vaucouleurs profile.DOUBLE
radius_sersicEffective radius containing half of the total luminosity of the source bulge as obtained by morphological fitting for the Sersic profileDOUBLE
radius_sersic_errorUncertainty in the effective radius containing half of the total luminosity of the source for the Sersic profile.DOUBLE
random_idRandom ID in the range 0.0 => 100.0 (not unique)REAL
redshift_ugcThe redshift of the source treated as a galaxy by the Apsis module UGC. The redshift is estimated from the sampled mean BP/RP spectrum applying a regression model based on Support Vector Machines (SVM), a supervised machine learning algorithm.REAL
redshift_ugc_lowerRedshift prediction lower limit from UGCDOUBLE
redshift_ugc_upperRedshift prediction upper limit from UGCDOUBLE
solution_idSolution identifierBIGINT
source_idUnique source identifier (unique within a particular Data Release)BIGINT
source_selection_flagsBit indicative of whether the input data from a given module met the source list eligibility criteria for the source of interest.SMALLINT
vari_best_class_nameBest class name with corresponding classification score in best_class_score. For the n_transits:5+ classifier in DR3, the following classes are published: ACV|CP|MCP|ROAM|ROAP, ACYG, AGN, BCEP, BE|GCAS|SDOR|WR, CEP, CV, DSCT|GDOR|SXPHE, ECL, ELL, EP, LPV, MICROLENSING, RCB, RR, RS, S, SDB, SN, SOLAR_LIKE, SPB, SYST, WD, and YSO. The GALAXY classifications are largely due to artificial variability.CHAR
vari_best_class_scoreIt describes a quantity between 0 and 1 which is related to the (median) normalised rank of the confidence of the classifier(s) in the identification of the best class (vari_best_class_name). In the special case of class EP, all scores are set to 1.DOUBLE