We describe the measurement of isophotal magnitudes, radii, intensity profiles, ellipticities and (b–r) colours for 6724 galaxies with b26.5 < 21.0 in a 2.63 degree square area centred on the Coma cluster. The sample is considered essentially complete to b26.5 = 20.0.
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Godwin et al. (1983) studied this question.