Fig. 1
Top-left and bottom-left: intensity images in logarithmic scale. AO artifacts are visible in the Z CMa images. HD 52841 is slightly elongated in the SE-NW direction. Bottom-right: the PI image of HD 52841 shows the noise that inevitably appears in the innermost 
of the image (indicated by the white circle) as a result of imperfect speckle suppression.
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