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We report the time series analysis of TESS light curves of three blazars, BLLacertae, 1RXS J111741.0+254858, and 1RXS J004519.6+212735, obtained using acustomized approach for extracting AGN light curves. We find tentative evidencefor quasi-periodic oscillations (QPOs) in these light curves that range from 2to 6 days. Two methods of analysis are used for assessing their significance:generalized Lomb-Scargle periodograms and weighted wavelet Z-transforms. Thedifferent approaches of these methods together ensure a robust measurement ofthe significance of the claimed periodicities. We can attribute the apparentQPOs to the kink instability model which postulates that the observed QPOs arerelated to the temporal growth of kinks in the magnetized relativistic jet. Weconfirm the application of this model to BL Lacertae and extend the kinkinstability model to the other two BL Lac objects.

Optical Quasi-periodic Oscillations in the TESS light curves of three blazars