Fig. 4
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Fit of the parameters modeling the fast exponential decorrelation of the NCPA as a function of spatial frequency in the original sequences. The quantities τ0 and a0 represent the characteristic time and amplitude of the decorrelation. The dotted line at 20 c/p shows the cutoff of the SPHERE ExAO system. The range of values estimated by Milli et al. (2016) from focal-plane images are overplotted in gray for comparison.
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