Soft band ACF for the whole sample: Voronoi delimitation (top panel); off-axis angle  < 10′ (lower panel). The filled (black) points correspond to the Hamilton estimator while the open (red) squares to the Landy & Szalay estimator. The error bars represent 1σ standard deviation. The dashed line represents the best power-law fit, while the continuous line corresponds to the constant γ = 1.8 fit. The inset plot presents the 1, 2 and 3σ contours in the fitted (θ₀,γ) parameter space.