We have started a two-month campaign to study the light curves of two CVs from a range of terrestrial longitudes, in order to break aliases arising from the Earth's rotation, and to study fine structure in the periodic signals. The southern campaign star is V803 Cen , nominally varying in the range 13-17. Or possibly 0.5 days. The wave is of unknown origin, but may be the signature of the world's shortest-period dwarf nova . Differential photometry with respect to this star in any filter, or no filter, is fine.
Visual observations are plenty useful too.
Care should be taken with the timing of observations. This is a challenge to unravel and demands long time- series photometry from a range of terrestrial longitudes. We have not yet established a standard comparison star, but a good choice would be the 11.5 mag star 2' NNW of the variable.