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Table: gaia_dr3.galaxy_candidates
(The bold columns are indexed columns)
| Column Name | Description | Datatype |
|---|---|---|
| classlabel_dsc | Class assigned by DSC based on the probability from its Combmod classifier | CHAR |
| classlabel_dsc_joint | Class assigned by DSC based on the probability from its Specmod and Allosmod classifiers | CHAR |
| classlabel_oa | Class label of the neuron that represents the source, as assigned by the OA module in Apsis | CHAR |
| classprob_dsc_combmod_galaxy | Probability from DSC-Combmod of being a galaxy (data used: BP/RP spectrum, photometry, astrometry) | DOUBLE |
| classprob_dsc_combmod_quasar | Probability from DSC-Combmod of being a quasar (data used: BP/RP spectrum, photometry, astrometry) | DOUBLE |
| ellipticity_de_vaucouleurs | Ellipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the de Vaucouleurs profile. | REAL |
| ellipticity_de_vaucouleurs_error | Uncertainty 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_sersic | Ellipticity (defined as 1-(b/a) where b/a is the axis ratio) of the source for the Sersic profile. | REAL |
| ellipticity_sersic_error | Uncertainty 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_vaucouleurs | This 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_sersic | Flag indicative of processing or scientific quality for the morphological parameters fitting for the Sersic Profile | REAL |
| intensity_de_vaucouleurs | Intensity of the source at the fitted effective radius (radius_de_vaucouleurs) for the de Vaucouleurs profile. | DOUBLE |
| intensity_de_vaucouleurs_error | Uncertainty of the light intensity at the fitted effective radius (radius_de_vaucouleurs) of the source for the de Vaucouleurs profile. | DOUBLE |
| intensity_sersic | Intensity of the source at the fitted effective radius (radius_sersic) for the Sersic profile. | DOUBLE |
| intensity_sersic_error | Uncertainty of the light intensity at the fitted effective radius (radius_sersic) of the source for the Sersic profile. | DOUBLE |
| l2_de_vaucouleurs | This 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_sersic | This 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_vaucouleurs | Vector form of the upper triangle of the correlation matrix for the fitted parameters for the de Vaucouleurs Profile | CHAR |
| morph_params_corr_vec_sersic | Vector form of the upper triangle of the correlation matrix for the fitted parameters for the Sersic Profile | CHAR |
| n_sersic | Sersic 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_error | Uncertainty in the Sersic index for the Sersic profile. | DOUBLE |
| n_transits | The number of transits used to reconstruct the image and to analyse the object morphology | SMALLINT |
| posangle_de_vaucouleurs | Position angle of the source for fitted de Vaucouleurs profile with respect to Celestial North Pole. | REAL |
| posangle_de_vaucouleurs_error | Uncertainty in the position angle of source with respect to Celestial North Pole for the de Vaucouleurs profile. | REAL |
| posangle_sersic | Position angle of the source for fitted Sersic profile with respect to Celestial North Pole | REAL |
| posangle_sersic_error | Uncertainty in the position angle of source with respect to Celestial North Pole for the Sersic profile. | REAL |
| radius_de_vaucouleurs | Effective 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_error | Uncertainty in the effective radius containing half of the total luminosity of the source for the de Vaucouleurs profile. | DOUBLE |
| radius_sersic | Effective radius containing half of the total luminosity of the source bulge as obtained by morphological fitting for the Sersic profile | DOUBLE |
| radius_sersic_error | Uncertainty in the effective radius containing half of the total luminosity of the source for the Sersic profile. | DOUBLE |
| random_id | Random ID in the range 0.0 => 100.0 (not unique) | REAL |
| redshift_ugc | The 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_lower | Redshift prediction lower limit from UGC | DOUBLE |
| redshift_ugc_upper | Redshift prediction upper limit from UGC | DOUBLE |
| solution_id | Solution identifier | BIGINT |
| source_id | Unique source identifier (unique within a particular Data Release) | BIGINT |
| source_selection_flags | Bit 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_name | Best 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_score | It 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 |
