Mean deflection spectra reconstructed by the multi-patch method from the lensed maps. “Raw lensing” denotes the spectrum measured directly on the maps as described in the text without performing any bias correction. In blue, we show the effect of subtracting the (known) analytical terms N⁽¹⁾ and N⁽²⁾. In red, one accounts for the Monte Carlo correction obtained for the set of all unlensed maps. The dashed line is the fiducial input spectrum. All points are assigned an error bar corresponding to the variance in the Monte Carlo simulations per sky map. The first bin for the raw-lensing estimate is located outside the plot (at a value of 3.5 × 10^-7). The same range as in Fig. 3 has been used for proper comparison.