Constraints on cosmological parameters from data derived from individual frequencies. The data used is 30 < ℓ < 2500 unless otherwise labelled, and in combination with a prior on τ. The reference case combines all frequencies. The constraints for 30 <ℓ < 800 and ℓ > 800 are obtained with foreground parameters fixed to the best fit of the reference case. The grey band shows the ± 1σ expected shifts in cosmological parameters with respect to the reference case (calculated as in Eq. (53) of Planck Collaboration XI 2016). For this test we use the PlikTT likelihood, as described in Planck Collaboration XI (2016). Results from individual frequencies are in very good agreement.
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