Same as the top panel of Fig. 5, but for synthetic data from lcurve. Results are shown for four sets of light curves: relativistic beaming turned off for both stars (black squares), beaming turned on for the cool companion only (red open circles), beaming turned on for the hot subdwarf only (blue open circles), and beaming turned on for both stars (purple filled circles). The dashed gray line marks 270° (symmetric shape) while the dashed green line and shaded region mark the peak of the empirical Δϕ_1 − 0 distribution and its uncertainty.