Notes. For reasons of completeness we reproduce the data from Clausen et al. (2001), but with an updated spectral type for HD 82074 from the Henry Draper Catalog (Cannon & Pickering 1993). Johnson V apparent magnitudes and Strömgren (b − y),m₁, c₁, and β colour indices are in the standard photometric systems (not corrected for interstellar extinction or reddening). The unit is magnitudes (mag). Uncertainties (σ) are in units of milli-magnitudes (mmag). For details on the transformation we refer to Olsen (1994) and references therein. For NY Hya the uvby measurements are taken at maximum light level outside eclipse (phase 0.25), at primary eclipse (phase 0.00), and at secondary eclipse (phase 0.50). The β measurement is the mean value taken for measurements outside eclipses (cf. Fig. 1 in Clausen et al. 2001). N is the total number of observations used to form the mean and σ is the root mean square (per observation) in units of mmag. We note that Fig. 1 in Clausen et al. (2001) shows a single β measurement during the primary eclipse and five during the secondary.