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Fig. 3.


Full ZIMPOL instrument field for the astrometric field 47 Tuc. The central detector field is plotted in black, while colors are used for the 8 pre-defined off-axis fields OAF1-OAF8. The off-axis fields have been shifted slightly (red to the left, blue to the right, and green up) for better visibility. No data are available for OAF4 because of an observational error.

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