Confirmation of the binary orbit from a comparison of the 2005–2012 photometric data without and with the orbital light-time corrections. Top left panel: Fourier amplitudes of the observed data near the f₁ frequency. Bottom left panel: Fourier amplitudes of the residuals after prewhitening the best 64-frequency solutions. Note the changed amplitude scale. The uncorrected data (dotted curve) shows the side peaks from the 124 (~1/ 0.008) d orbit, while the data corrected for the spectroscopically detected binary orbit eliminates these peaks. The difference of the f₁ side peaks from the lower left panel is demonstrated in the top right panel. A similar analysis for f₂ (bottom right panel) confirms the detection.