Fig. 4
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Expected performance for a PIAAN optimizing detection of a companion at 2 λ/D with a 30% bandwidth, i.e., in the RISTRETTO case between 620 and 840 nm. Behavior outside the optimization band is shown in the light gray areas. Left: star null ρ⊙, showing the influence of the residual secondary obstruction. Right: companion coupling mostly independent of the residual obstruction.
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