Simulated profiles showing azimuthal standard deviation as a function of angular separation for focal plane images presented in Fig. 5. The red profile shows the contrast curve of a short-exposure image depicting what is obtained by SPHERE under good observing conditions. The contrast in the range 5 − 18 λ/D mostly stays around 10−5. For a realistic long exposure, the blue profile is mostly below 3 × 10−6 in the range 5 − 18 λ/D.
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