Our Walraven photoelectric observations of GW Car, V685 Cen and V742 Cen
were published in van Houten et al. (2003). They were listed in their Tables
3,4,5 and 6. In the case of V764 Sco the number of individual observations
in every passband reached 1094. Therefore, in their Table 7 there are presented
100 normal points in every passband in normalised intensities instead of original
observations.
The procedure of calculation of normal points in intensities can be described
as follows. The normal points in magnitudes were calculated as a mean value of
brightness in an interval of the orbital phases 0.01P . The standard deviation σ
of the normal point is