Composite plot of the SEDs in the source-frame for the radio galaxies with spectroscopic redshift. The thick line is the B&C model of an elliptical galaxy of 13 Gyr and 10¹²   M_⊙ (see footnote on page ). The individual UV-O-SEDs are normalized to this model. The broken lines indicate the sources 0744+464, 1159+395, 1314+453A, and 3C 237, which do not have data-points at λ > 4000 Å and whose UV-O-SED normalization is therefore quite arbitrary.