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Fig. 4
VLBA spectral index image of PBC J2333.9-2343 between 8 and 15 GHz, overlaid with 8 GHz total intensity contours. The colour scale range is − 1 < α < + 1 and it is shown by the wedge on the top; contours are traced at (1,10,100,1000) × 0.35 mJy beam-1.
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