Fig. 13
Dependence on u = τ0 − τ of the integrand in Eq. (4). The case i = j = 1, which has the largest contribution at low redshift, is shown. The function is shown for ℓ = 4000 (lower panel) and 40 000 (upper panel). We note the different ordinate scales and the low-u cut in the latter case, where we estimate a reduction of P11(40 000) by ~4 per cent.
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