Open Access
Fig. 10.
Equivalent tensor-to-scalar ratio (req) of the sum of the extragalactic foregrounds at ℓ = 5, corresponding to the reionisation B-bump. We also show the σr for LiteBIRD, PICO, and CLASS (dashed lines). For Planck, the current 1σ upper limit is r < 0.028 and is thus not visible in the figure.
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