Fig. 1

Top: S/N map of total intensity with IRDIS in BB_H filter. Bottom: S/N map of polarimetric image observed with IRDIS in BB_J filter. The dashed line indicates approximate position of the ansa in both images and the arrows indicate front and back sides of the disk. Both images are rotated to 90° – PA and cropped at 6″ × 1.3″. The color bar shows the intensity in both the images.
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