Multi-colour photometry from MuSCAT2, ProEM, and ALFOSC shown for filters g′ (blue), r (green), i, and i′ (yellow), and z_s (red) and phase-folded to the 25.01 h period. The reference time for the phase folding is 0.0. The MusCAT2 photometry is binned to 3 min, the ProEM photometry to 2 min, and the ALFOSC photometry is not binned. The y-offset of the light curves corresponds to the 25.01 h period signal cycle.