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Fig. 2.
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Spectral index map using LOFAR-VLBI (144 MHz), uGMRT (1260 MHz), and VLA (1520 MHz) data for the Original TRG. Grey contours represent 3, 6, 12, 24…σrms levels, with σrms = 38 μJy beam−1 being the noise from the LOFAR-VLBI, wide-field image at 1.5″ resolution in Fig. 1.
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