Comparison (left and right panels) between c ₂₀₀ measured for relaxed clusters using profile fitting and that obtained from the radius ratio (left panel) and v _max/ v ₂₀₀ (right panel). The diagonal line represents the ideal case when the measured concentrations agree exactly. The middle panel shows the ratio of the maximum circular velocity to that at radius R ₂₀₀ for z = 0 for the relaxed sample as a function of mass. Note the smooth crossover between the GS and HACC runs at M ₂₀₀ ~ 10 ¹⁴  h ⁻¹ M _☉ at redshifts z = 0, 1 (cf. Figure  1).