Ideal clusters. Upper panels: cumulative total mass (calculated as the sum of gas mass and dark matter mass) with different models, binnings, and maximum radii for the cluster fulfilling perfect hydrostatic equilibrium. The green continuous line shows the true profile according to the simulations. The green vertical dotted lines show r₅₀₀ and r₂₀₀, which are computed based on the true profiles and the characteristic overdensity of the Universe at the corresponding redshift. The value of r₂₀₀ is markedly larger than stated in Sect. 2.3, as the gas mass accounts for a considerable part of the total mass for the cluster fulfilling perfect hydrostatic equilibrium. Lower panels: ratio of fitted cumulative total mass and corresponding true mass. (a) different gas density models, (b) different dark matter mass models, (c) different binnings, (d) different maximum radii of the fit.