QSO candidates

This table contains parameters derived from various modules dedicated to the classification and characterisation of sources considered as QSO candidates. Together with those, the QSOs used to define the Gaia-CRF3 are also listed in this table. 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.

Known issues

The surface brightness sample published in the qso_candidates is based on an input list of sources described in Section 9.2 of the on-line documentation. This list was built based on external catalogues and the table qso_catalogue_name provides the names of the applicable catalogues for each of the sources featuring surface brightness parameters in qso_candidates. Due to an oversight during the processing, the catalogue name is missing for 494 sources. In this file, the list of affected sourceIds is provided.