Light curves and periodograms of the disentangled KWS data in the V (blue) and Ic (black) bands. Upper panel: Disentangled light curves with the sinusoidal fit corresponding to a period of 1910 days shown as a dashed grey line. Average magnitude errors for both bands are presented on the left side of the plot. Middle panel: GLS periodograms of the disentangled light curves. The periodograms and their respective FAP limits are normalised to the observed maximum power. Frequencies corresponding to a one-year period and their first five harmonics are marked by orange lines. Arrows indicate frequencies corresponding to the periods of 417 and 1910 days. Bottom panel: Phased light curves corresponding to the period of 417 days.