Fig. 3.

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Radio maps of NGC 2359 obtained using archival data. For each map, the central frequency and rms noise (σ) in units of mJy beam−1 are mentioned in each panel. Barring the image at 150 MHz, all maps are convolved to a circular beam of 22″. The 150 MHz map has a beam size of 29.1″ × 24.9″ and is smoothed across 3 pixels using a Gaussian kernel. The “X” marks the location of the star in all the panels. Identified apertures (E1–E4) and the central region used to obtain the SEDs are shown in the 1425, 4860, and 8689 MHz maps. Contour levels are as follows: (i) For maps with the central frequency of 150 MHz, contour levels start from 2σ and increase in steps of 1σ. (ii) For maps with central frequencies of 887 and 943 MHz, contour levels start from 3σ and increase in steps of 5σ. (iii) The 1425 MHz map has contour levels of [3, 7, 11, 15, 23, 31, 39, 47, 54, 62, 70, 78] × σ. (iv) For maps with central frequencies of 4860 and 8689 MHz, contour levels start from 3σ and increase in steps of 4σ. In all panels, the contours are smoothed over 3 pixels using a Gaussian kernel.
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