Modulation of the quiescent fraction of satellite galaxies as a function of orientation with respect to the major axis of their central galaxy. Symbols with error bars show the median values with 1σ confidence interval in bins of 5 deg. The modulation is fitted by a cosine function, and the amplitude of the modulation and median F_q are indicated in the right bottom corner with a 1σ confidence interval. The shaded zone around the cosine function indicates a 1σ confidence interval in the amplitude fitting. The bottom panels represent the residuals between the data and the fitting. The orientation of the minor and major axes of central galaxies is indicated by vertically shaded regions. Left: results for all 8162 satellites log₁₀[M_⋆/M_⊙] > 8 inside R₂₀₀ at z ∼ 0. The marginal distributions of the fitting parameters are shown in Fig. D.1. Right: same, but for young (green line) and old (blue line) satellites separately. The corresponding marginal distributions of the fitting parameters are shown in Figs. D.2 and D.3.