The PRS of FRB 20190417A has a flat spectrum (α = 0.20) above 1 GHz with turnover >370 MHz, consistent with a magnetar wind nebula younger than 250 years and smaller than 0.4 pc.
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The spectrum of the persistent radio source associated with FRB 20190417A
The PRS of FRB 20190417A has a flat spectrum (α = 0.20) above 1 GHz with turnover >370 MHz, consistent with a magnetar wind nebula younger than 250 years and smaller than 0.4 pc.