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Fig. 4.


Combined uGMRT (550−750 MHz), VLA L-band (1−2 GHz), and VLA S-band (2−4 GHz) image of the Toothbrush relic manifesting a variety of small- and large-scale complex filamentary structures. The intensity in red, green, and blue shows the radio emission observed with the uGMRT, VLA L-band, and VLA S-band, respectively. The colors reflect the local spectral index variations within the relic, although there is not a 1:1 match.

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