Mass comparison and mass bias estimates. On the left, we plot the CLASH lensing masses as a function of the Planck SZ mass proxy. Red points represent clusters found in the PSZ1 (13 objects) and blue those of the remaining objects at lower signal-to-noise (eight clusters); open circles identify the three clusters in the high-magnification subsample. The solid line is the equality line. The strongest outlier in the upper left corner is CLJ1226 at z = 0.89, the highest redshift object in the sample. The right-hand panel plots ρ = MPL/MCL as a function of CLASH mass together with its uncertainty Δρ (see text) in the same color scheme. The green line and band correspond to the sample mean, ⟨ ρ ⟩ s, and its standard deviation obtained from a bootstrap analysis: E( ⟨ ρ ⟩ s) = 0.72 ± 0.059, where E indicates a calculation over the bootstrap and ⟨ ρ ⟩ s is calculated as the inverse-variance weighted mean. Similarly, the magenta line and band represent the bootstrap mean and uncertainty of the unweighted mean: E( ⟨ ρ ⟩ s) = 0.76 ± 0.052. The dashed line indicates zero mass bias.
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