Planck 2015 results
Free Access

Fig. 24


Bayesian movable knot reconstructions of the primordial power spectrum using Planck TT data. The plots indicate our knowledge of the PPS for a given number of knots. The number of internal knots Nint increases (left to right and top to bottom) from 0 to 8. For each k-slice, equal colours have equal probabilities. The colour scale is chosen so that darker regions correspond to lower-σ confidence intervals. 1σ and 2σ confidence intervals are also indicated (black curves). The upper horizontal axes give the approximate corresponding multipoles via kDrec, where Drec is the comoving distance to recombination.

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