Fig. 2.
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Map of the spectral index obtained from the ratio between the 6 GHz and 22.2 GHz images. The contours are a map of the 22.2 GHz continuum emission obtained with the same clean beam as the 6 GHz image. Contour levels range from 0.5 to 5.5 in steps of 1 mJy beam−1. The ellipse in the bottom right is the half-power width of the synthesised beam.
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