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Fig. D.2.

image

Normalized Stokes parameters q and u as a function of aperture radius for the observations of the unpolarized standard star HD 176425 (2016) in the Ks-band. The central and outer dashed lines indicate the radii of the apertures from which the normalized Stokes parameters and their error bars (see Figs. 8 and D.4) have been determined, respectively.

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