Comparison of Y_5R500 estimates from individual codes in the PSZ1 and PSZ2. The Y_5R500 estimator is the mean of the Y−θ posteriors, marginalised over θ_S (“Y blind”). The circled red points denote sources with S/N> 20. The dashed green lines show the 1−σ envelope of the best-fit relations shown in Table 4. MMF1 estimates are shown top left, MMF3top right. PwS estimates are shown bottom left. The bottom right panel compares PwS estimates having re-analysed PSZ1 data using uninformative priors on Y_5R500 and θ_S.