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Fig. H.1.

image

B-mode polarisation power spectrum measurements from Planck PR4 (this work), SPTpol (Sayre et al. 2020), ACTPol (Choi et al. 2020), POLARBEAR (POLARBEAR Collaboration 2017, 2020), the BICEP2/Keck Array (BICEP2 Collaboration 2018), and WMAP (Bennett et al. 2013). Uncertainties are 68% confidence levels, while bandpowers compatible with zero at 95% CL are plotted as upper limits. The solid red curve shows the BB lensing spectrum based on the Planck 2018 ΛCDM best-fit model (Planck Collaboration VI 2020). The dashed red curve corresponds to the BB power spectrum for r = 0.044, the upper limit obtained in this work when combining Planck (TT, EE, and BB) with BK15.

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