Since almost half of the galaxies have been observed
more than once in Gunn r and Johnson B
(cf. Table , p.
),
we have ample opportunity to
determine the internal accuracy of the data.
For the photometry, we first compare aperture magnitudes,
and then the entire surface brightness profiles.
Properties of E and S0 Galaxies in the Clusters HydraI and Coma
Master's Thesis, University of Copenhagen, July 1997
Bo Milvang-Jensen (milvang@astro.ku.dk)