Planck 2015 results
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Table 2

Summary of mass scale priors.

Prior name Quantity Value and Gaussian errors

Weighing the Giants (WtG) 1−b 0.688 ± 0.072
Canadian Cluster Comparison
Project (CCCP) 1−b 0.780 ± 0.092
CMB lensing (CMBlens) 1 / (1−b) 0.99 ± 0.19

Baseline 2013 1−b 0.8 [− 0.1, + 0.2]

Notes. For CCCP, we use the value determined for Planck clusters at S/N> 7 (Hoekstra et al. 2015, left column of p. 706) and we add in quadrature the statistical (0.07) and systematic (0.06) uncertainties. CMB lensing directly measures 1 / (1−b), which we implement in our analysis; purely for reference, this constraint translates approximately to . The last line shows the 2013 baseline – a reference model defined by 1−b = 0.8 with a flat prior in the [0.7, 1] range.

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