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Fig. A.1

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Variation of the degree of polarization (P, a), and polarization angle (θ, b) as a function of distance, rp𝑔eo for Kronberger 1 cluster direction. The probable cluster member stars are marked by the red open circles. The solid blue line in panel (b) represents the orientation of the Galactic plane in this direction, and the vertical gray lines in both panels correspond to the expected distance to the foreground clouds.

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