Fig. 1
Polarization degree images obtained using ZIMPOL and filters NR (λC = 0.65 μm) and cnt820 (λC = 0.82 μm). The white contours show the total intensity at 80, 40, and 20% of the peak value. The red circle marks the position of the companion and the white ellipses on the lower right corners show the FWHM of the observed PSF reference star at each given filter. The offsets in declination and right ascension are given with respect to the position of Mira A.
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