Angular power spectrum (blue dots) estimated with the NLIC method, with 1σ Fisher errors. These error bars include cosmic variance, approximated as Gaussian (see Fig. 1 in Planck Collaboration VI 2020). The ΛCDM best fit model (), with a power-law fluctuation distribution and k_min = 0, is shown in black. The red curve (for k_min = 2.82/r_dec) is the best fit to the whole range of ℓ’s with an optimized k_min ≠ 0. The two curves are indistinguishable at ℓ ≳ 6, but deviate significantly from each other for the low multipole moments, corresponding to large angles (≳60°). The Sachs-Wolfe contribution to dominates at ℓ ≲ 30, while local physical effects, such as acoustic oscillations, dominate at ℓ ≳ 30.