Fig. 2
From: A 34.5 day quasi-periodic oscillation in γ-ray emission from the blazar PKS 2247–131
Detection of the quasi-periodic oscillation signal. In the left panel, the WWZ power for the whole light curve in Fig. 1 is shown. A periodicity around ~34 days is detected in the time period of MJD 57693–57903, as indicated in Fig. 1. In the right panel, we show the WWZ power and LSP power obtained for the light curve in the time period of the periodic modulation. The black and red curves are the time-averaged WWZ power and LSP power, respectively. The blue dashed and green dash-dotted curves are 4σ and 5σ significance curves, respectively, obtained from the light curve simulation. The simulation indicates that the signal has a significance of 5.2σ (or 4.6σ considering a trial number of 20)
