... a previously known QSO/active galactic nucleus (AGN) in the catalogue of Veron-Cetty ... This absolute magnitude cut excludes AGN where the contribution from the host galaxy ...
... Where a 2QZ source matches the position (to within 6 arcsec) of a previously known QSO or active б б galactic nucleus (AGN) in the catalogue of Veron-Cetty & Veron (2000), we include the previously known redshift. ...