Fig. 17
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Spectral index comparisons. Left: high-frequency wide-band radio spectral index (144-1400 MHz) from LoTSS and NVSS versus the LoLSS in-band spectral index (42–66 MHz). Center: the same but using a low-frequency wide-band radio spectral index (54–144 MHz) from LoLSS and LoTSS. Right: comparison between the high- and the low-frequency wide-band spectral index.
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