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Fig. 5.
Comparison of the flux densities of the compact components of the FR0CAT sources in LOFAR (at 150 MHz) and FIRST (at 1.4 GHz). The red dots represent the 12 sources extended in the LOFAR images. The lines are the loci of constant spectral indices α (defined as Fν ∝ ν−α) at the values indicated.
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