Residuals with respect to the input correlation function for the Landy-Szalay estimator (dashed-blue) and for the minimum variance estimator (solid-red). We also show the corresponding ± 1σ (rms from lognormal simulations) for Landy-Szalay (dotted-blue) and for the minimum variance estimator (dot-dashed-red). Residuals and rms are rescaled by s2. The optimal estimator has been obtained limiting the χ2 to the region [40, 200] h-1 Mpc. This range has been chosen accordingly to the typical range used in BAO analysis. (Coloured version of the figure available online.)
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