Source density in our colour- and magnitude-selected weak lensing source catalogue for RCS2 J2327 as a function of projected distance from the cluster centre, taking field boundaries, manual masks, and a bright objects mask into account. Error bars are underestimated, as they assume Poisson galaxy counts ignoring spatial clustering. The dashed black line indicates the average density over the whole field of view, while the blue curves indicate the approximately expected profile due to lensing magnification assuming the best-fitting NFW model for c_200c = 5.1 (solid) or c_200cϵ[4.1, 6.1] (dotted, close to the solid curve). The vertical black dotted line and the arrow indicate the lower radial limit in the weak lensing shear profile fit.