The measured C_ℓ before (triangle) and after (circle) source subtraction, with 1σ error bars shown only for the latter. The dashed line shows the best-fitting power law (ℓ ≤ 800) after source removal. The thin solid line (lowest curve) with 1σ error bars shows the model prediction of Ali et al. () assuming that all point sources above S_c = 20 mJy have been removed.