Planck 2015 results
Free Access

Fig. 31


Slow-roll parameter ϵ for reconstructed trajectories using 12 knots (marked as Δ at the bottom of the figure) with cubic spline interpolation. The mean values are shown for floating r and r fixed to be 0.1 and 0.01. Sample 1σ trajectories shown for the floating r case show wide variability, which is significantly diminished if r is fixed to r = 0.1, as shown.

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