Radial profiles of the relative uncertainties (ϵ/Y − 1) on (left) gas density, (center) 3D gas temperature, and (right) projected spectroscopic-like temperature due to (i) the errors on the assumed parameters that describe the mass dependence, (ii) the scatter in the c − M − z relation, and (iii) the intrinsic scatter on the “universal” pressure profile. Red (green) dotted lines indicate the median values of the 16th and 84th percentiles (and of the medians) estimated at each radius. The case refers to the input values (M₅₀₀, z) = (4.6 × 10¹⁴ M_⊙, 0.6), which represents the median values of the S18 sample.