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Fig. 15.
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VLA 1.4 GHz/LOFAR 144 MHz spectral index map of the radio emission of A1213 at the angular resolution of 40″ × 40″. As a reference, we also plot in black the contours of the LOFAR image at the same resolution. Contour levels are at 0.84, 3.36, 13.44, 53.76, and 215.04 mJy beam−1.
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