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In this paper, the time series analysis method CLEANest is employed to search for characteristic periodicities in the radio light curves of the blazar NRAO 530 at 4.8, 8.0 and 14.5 GHz over a time baseline of three decades. Two prominent periodicities on time scales of ∼6.3 and ∼9.5 a are identified at all three frequencies, in agreement with previous results derived from different numerical techniques,...
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