Fig. 9


100 deg2 of the region surrounding Hoinga as seen at 2.3 GHz by SPASS. Top-left panel: Stokes I image, and top-right panel: image after source subtraction, discussed in Sect. 3.4. Hoinga is clearly visible as a filled ellipse in the centre of the image, while Galactic cirrus and residuals around poorly subtracted diffuse sources are visible in the surroundings. Bottom left and bottom right panels: Stokes Q and U images, respectively.

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