Auto-correlations of two spectroscopic samples for a single redshift bin (Δz = 0.05). The yellow and red points are obtained using the first estimator ${\mathit{w}}_{\mathrm{ss}}^{(1)}$ with γ ∈ { − 1,   + 1}. The blue and purple points are obtained using the second one ${\mathit{w}}_{\mathrm{ss}}^{(2)}$ with γ ∈ { − 3,   − 1}. The consistency of the points with different weights illustrates the effective weighting due to the estimator definition.