The catalogue (Table_QSO, Table_BL, Table_AGN and Table_reject) and the list of references are only available in electronic form at CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/455/773 or at the Observatoire de Haute Provence (http://www.obs-hp.fr/)

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H₀=50 km s^-1 Mpc^-1 and q₀=0 is assumed throughout this paper.

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...=-23

In the 11th edition, we included 5015 galaxies from the SDSS first release, classified as QSOs on the basis of their colours only. We thank Jenny Greene who has pointed out this error which is now corrected.

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