Rest-frame velocity distribution relative to the mean cluster velocity of the 120 galaxies having R < 20 (left panel), and of the 395 galaxies within 1 Mpc from the cluster centre (right panel). The smooth curve is the probability density function obtained with a kernel density estimator. In both panels, the dashed line indicates the rest-frame velocity of the BCG: (V_BCG − ⟨V⟩)/(1 + z) = 333 km s⁻¹.