Median of the distributions shown in Fig. 4 as a function of the cosmic baryon fraction f_b for the ratio between either the hydrodynamic mass (dotted lines) or the reconstructed virial mass (full lines) and the dmo counterpart on the subset of Magneticum Boxes 1a for the simulations with different cosmologies (see Table 2). Different colours correspond to the four redshifts z ∈ {0.0, 0.3, 0.5, 0.9}. The filled regions corresponds to one median absolute deviation around the median.