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Fig. 21.


α Hyi A and B observed in the I_PRIM filter with panel a: small and panel b; medium MT classical Lyot coronagraph, panel d: without coronagraph, while (panel c) was taken in the N_I band filter. and the four quadrant phase mask 4QPM2. The circles are flux apertures for component A (center), component B at ρ = 91 mas (black), while (panel a) shows also the concentric comparison apertures. North is up and east to the left.

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