Detection of a persistent ~433-day optical QPO in blazar 3C 454.3 at 2.53σ significance using Lomb-Scargle, WWZ, and PDM methods, with a new test for seasonal gaps.
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New multi-band optical monitoring of quasar 4C 29.45 finds variability amplitudes of 220%, 208%, and 209% in V, R, I; spectral indices 1.032-1.573; achromatic trends; and no short-term periodicity.
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Detection of optical quasi-periodic oscillation in the blazar 3C 454.3
Detection of a persistent ~433-day optical QPO in blazar 3C 454.3 at 2.53σ significance using Lomb-Scargle, WWZ, and PDM methods, with a new test for seasonal gaps.
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Shortterm optical variability of 4C 29.45
New multi-band optical monitoring of quasar 4C 29.45 finds variability amplitudes of 220%, 208%, and 209% in V, R, I; spectral indices 1.032-1.573; achromatic trends; and no short-term periodicity.