Fig. 8.
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Local variance of the 21 cm brightness temperature maps of the 21cmFAST simulations, after applying telescope resolution smoothing and adding telescope noise, for an optimistic case (bmax = 65 km, left), and a pessimistic case (bmax = 2 km, right). The shaded regions correspond to the standard deviation of the σloc values obtained from 100 different realisations of the thermal noise.
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