The guaranteed permanent URL for this site is https://3crr.extragalactic.info/. Please update your bookmark if you came here by a different route.
Recent updates: optical magnitudes and references added; references for redshifts, positions, radio classifications added and some updates for redshifts. Bibliography page upgraded to only include references used in the current database. Some duplicates in the references need removing (02/12/03). Default cosmology changed to concordance cosmology (14/12/03). New 5-GHz core fluxes added (15/12/03). Some LAS values updated (11/03/04). Catalogue moved to new server (31/01/05). Some changes made to FRI/FRII classifications (25/01/06).
The latest database page is here.
Some information on the fields available in the database is here.
The bibliography for the database is here.
Some credits are here.
The database maintainer can be contacted at