Galaxy Candidates (gaiadr3.galaxy_candidates)

The table has 4842342 rows, 38 columns.

Description

This table contains parameters derived from various modules dedicated to the classification and characterisation of sources considered as galaxy candidates. This table has been constructed with the intention to be complete rather than pure and, as such, it will contain a large fraction of non-genuine extragalactic sources. Purer samples can be drawn using dedicated flags or queries. Please refer to Chapter cu3qso of the on-line documentation for details about how this table was built, its content, and for recommendations regarding its exploitation.

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.

Columns

Name Type UCD Unit Description
solution_id long meta.version

Solution Identifier
source_id long meta.id
meta.main
meta.ref

Unique source identifier (unique within a particular Data Release)
vari_best_class_name char meta.code.class

Name of best class, see table VariClassifierClassDefinition for details of the class
vari_best_class_score float stat.probability

Score of the best class
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_quasar float stat.probability

Probability from DSC-Combmod of being a quasar (data used: BP/RP spectrum, photometry, astrometry)
classlabel_dsc char meta.code.class

Class assigned by DSC based on the probability from its Combmod classifier
classlabel_dsc_joint char meta.code.class

Class assigned by DSC based on the probability from its Specmod and Allosmod classifiers
classlabel_oa char meta.code.class

Class assigned by OA the neuron that represents the source
redshift_ugc float src.redshift

Redshift from UGC
redshift_ugc_lower float stat.value
src.redshift

Redshift prediction lower limit from UGC
redshift_ugc_upper float stat.value
src.redshift

Redshift prediction upper limit from UGC
n_transits integer meta.number

Number of transits used for the morphological analysis
posangle_sersic double pos.posAng deg

Fitted position angle of the source for the Sersic Profile
posangle_sersic_error double stat.error
pos.posAng 		deg

Error on the fitted position angle of the source for the Sersic Profile
intensity_sersic double phot.flux
em.opt 		"electron".s**-1

Fitted intensity of the source for the Sersic Profile
intensity_sersic_error double stat.error
phot.flux
em.opt 		"electron".s**-1

Error on the fitted intensity of the source at effective radius radiusSersic
radius_sersic double phys.angSize mas

Fitted effective radius of the source for the Sersic Profile
radius_sersic_error double stat.error
phys.angSize 		mas

Error on the fitted effective radius of the source for the Sersic Profile
ellipticity_sersic double src.ellipticity

Fitted ellipticity of source for the Sersic Profile
ellipticity_sersic_error double stat.error
src.ellipticity

Error on the fitted ellipticity of the source for the Sersic Profile
n_sersic float stat.fit.param

Fitted Sersic Index for Sersic Profile
n_sersic_error float stat.error

Error on the fitted Sersic Index for Sersic Profile
l2_sersic double stat.fit.param

L2 norm for the Sersic Profile
morph_params_corr_vec_sersic double[] stat.correlation

Vector form of the upper triangle of the correlation matrix for the fitted parameters for the Sersic Profile
flags_sersic short meta.code.qual

Flag indicative of processing or scientific quality for the morphological parameters fitting for the Sersic Profile
posangle_de_vaucouleurs double pos.posAng deg

Fitted position angle of the source for the de Vaucouleurs Profile
posangle_de_vaucouleurs_error double stat.error
pos.posAng 		deg

Error on the fitted position angle of the source for the de Vaucouleurs Profile
intensity_de_vaucouleurs double phot.flux
em.opt 		"electron".s**-1

Fitted intensity of the source for the de Vaucouleurs Profile
intensity_de_vaucouleurs_error double stat.error
phot.flux
em.opt 		"electron".s**-1

Error on the fitted intensity of the bulge for the de Vaucouleurs Profile
radius_de_vaucouleurs double phys.angSize mas

Fitted effective radius of the source for de Vaucouleurs Profile
radius_de_vaucouleurs_error double stat.error
phys.angSize 		mas

Error on the fitted effective radius of the source for the de Vaucouleurs Profile
ellipticity_de_vaucouleurs double src.ellipticity

Fitted ellipticity of source for the de Vaucouleurs Profile
ellipticity_de_vaucouleurs_error double stat.error
src.ellipticity

Error on the fitted ellipticity of the source for the de Vaucouleurs Profile
l2_de_vaucouleurs double stat.fit.param

L2 norm for the de Vaucouleurs Profile
morph_params_corr_vec_de_vaucouleurs double[] stat.correlation

Vector form of the upper triangle of the correlation matrix for the fitted parameters for the de Vaucouleurs Profile
flags_de_vaucouleurs short meta.code.qual

Flag indicative of processing or scientific quality for the morphological parameters fitting for the de Vaucouleurs Profile
source_selection_flags integer meta.code.status

Bit indicative of whether the input data from a given module met the source list eligibility criteria for the source of interest