Reconstruction of the primordial power spectrum from the LGMCA WMAP nine-year data and its corresponding pseudo spectrum shown in red. For comparison, we also show the mean of the reconstruction for n_s = 0.972 and α_s = 0 with a solid dark blue line with the 1σ interval around the mean shown as a shaded blue region. The WMAP nine-year fiducial primordial power spectrum with n_s = 0.972 and α_s = 0 is shown in yellow and in cyan we show the best-fit primordial power spectrum with a running from WMAP nine-year data with n_s = 1.009 and α_s = − 0.019. In panel b), we plot the LGMCA WMAP nine-year pseudo power spectrum (blue crosses) and the estimated instrumental noise power spectrum including the point sources power spectrum is shown (solid black line). The very small blue region corresponds to the 1σ interval around the mean reconstructed spectrum (i.e. blue region in panel a)). As can be seen, we do not detect a significant deviation of the WMAP nine-year data from the best fit near scale-invariant spectrum.