Multi-antenna probing of absorbing regions inside and outside Cassiopeia A

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Fig. 8.

Modeling of flux-density changes in Cas A over the period 1956–2046 at 10–70 MHz. Secular decline is determined from Eq. (6). Evolution of the Cas A spectrum is driven only by two parameters: EM_ISM and A characteristic for the “bare” radio source (see Sect. 3.2).

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