2026-10-13T08:37:48Zhttps://gaia.aip.de/oai/oai:gaia.aip.de:tables/gaiadr3.qso_candidates2022-06-13tables10.17876/gaia/dr.3/65QSO candidatesEuropean Space Agency (ESA)DPAC ConsortiumAstronomyLeibniz Institute for Astrophysics Potsdam (AIP)<p>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 <a href="chap:cu3qso">cu3qso</a> of the on-line documentation for details about how this table was built, its content, and for recommendations regarding its exploitation.</p>
<h3>Known issues</h3>
<p>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 <a href="https://www.cosmos.esa.int/documents/29201/8583932/missing_qso_catalogue_name_sourceId.csv/8e6917a1-bf55-3bf2-ddc0-473e829f1c31?t=1650883220039">this file</a>, the list of affected sourceIds is provided.</p>2022-06-13BY_NC_IGDataset