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Fig. A.2
Normalised flux coming through a circular aperture. Top: aperture is centred on the target, F(ρ = 0″) ≡ 1. Middle: target is 0.8′′ offset along the dispersion axis, F(0.8″) = 0.72. Bottom: target is 1.1′′ offset along the dispersion axis, F(1.1″) = 0.58.
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