Fig. A.1.

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WENSS intensity image of BD+43°3654 at 325 MHz. The full width at half maximum of the beam is ≈54″×77″. The black contour levels are at 44, 54, 64, 74, and 84 mJy beam−1. We overplot green contours from the intensity map at 3 GHz from Benaglia et al. (2021) at the levels of 1.5, 2, 3, 4, 5, and 6 mJy beam−1; the dashed circle corresponds to the primary beam of that observation.
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