Fractional variation of the total mass M_tot (Table 1) for the seven peaks as a function of the overdensity threshold adopted to identify them, expressed in terms of the corresponding multiples n_σ of σ_δ. The reference total mass value is the one at the 5σ_δ threshold. The different lines correspond to the different peaks as in the legend. The filled symbols on the right, with their error bars, correspond to the fractional variation of M_tot calculated at 5σ_δ resulting from the uncertainties on the density reconstruction quoted in Table 1. The position of the error bars on the x-axis is arbitrary. In all cases, these errors are much larger than the uncertainty resulting from slightly modulating the overdensity threshold employed.