Fig. 1
Left: Cas A in the LOFAR LBA. The central frequency is 54 MHz, the beam size is 10″, the noise is 10 mJy beam−1, and the dynamic range is 13 000. Right: Cas Ain the VLA L-band. Continuum image from combining the spectral windows at 1378 and 1750 MHz. The resolution is 14″ × 8″ with a position angle of 70°, and the noise is 17 mJy beam−1.
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