2021
DOI: 10.48550/arxiv.2101.02497
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Quasi-Periodic Oscillations in the long term radio light curves of the blazar AO 0235+164

Ashutosh Tripathi,
Alok C. Gupta,
Margo F. Aller
et al.

Abstract: We present time series analyses of three-decade long radio observations of the BL Lacertae object AO 0235+164 made at the University of Michigan Radio Astronomical Observatory operating at three central frequencies of 4.8 GHz, 8.0 GHz and 14.5 GHz. We detected a quasi-periodic oscillation of ∼965 days in all three frequency bands in the light curve of the effectively simultaneous observations, along with strong signals at ∼1950 d, ∼1350 d, and ∼660 d. The periodicity is analyzed with three methods: Data Compen… Show more

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