Shot noise estimation over 100 realisations, using one realisation of the PINOCCHIO PLCs, in four redshift bins in the range 0.2 < z < 1.0 (panels from left to right). The red circles represent the angular power spectrum of the half-sum (HS) maps, which include the contribution of both signal and noise. The purple squares instead show the angular power spectrum of the half-difference (HD) maps, which provide a direct estimate of the shot noise, with their average (purple dashed line) and standard deviation (purple shaded band) in agreement with the theoretical Poissonian value (cyan solid line).