Joint posterior for tensors and running of the scalar spectral index marginalizing over other parameters. The contours are set at 68% and 95%. The red contours apply for Planck+WP+high-ℓ data. The colour of the scattered points indicates the distribution of ΩK. The blue contours apply when BAO data is also included. (ΩK is then found to be well constrained close to zero.) The dashed vertical line shows the no-running solution.
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