Phase-folded X-ray (top panel, 50 phase bins), BUSCA optical (middle panel), and ZTF optical (bottom panel, 25 phase bins) light curves of 3XMM J000511.8+634018. Phase zero was placed in the centre of the X-ray bright phase, BUSCA data shown in blue, red, and black for the blue, red, and UV filters were adjusted in phase so that the absorption dips coincide. We show the flux ratio with regard to the photometric comparison star. ZTF data through g- and r-filters shown in blue and red were shifted to approximately coincide with the X-ray data. Bottom panel: both the original (small dots) and the phase-binned (larger dots connected by lines) data are shown. Top and bottom panels: two cycles are plotted for clarity, but error bars for ZTF data are shown only for one cycle for better visibility.