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Fig. 5.


Transmission map for the six outputs of the modified nuller design for a VLTI 4-UT aperture geometry over a ±15 mas field of view. A five pointed star marks the location of the center of the field, where the rejection by the nuller is optimal. All maps share the same colorbar, with a transmission that range from zero on the null to 50% of the total flux collected by the four apertures (2 FT). Compared to the maps provided in Fig. 4, the amplitude of the colorscale was reduced by a factor of 2.

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