Optical Quasi-Periodic Oscillation of Blazar PKS 1440-389 in the TESS Light Curve

• Published in: Universe (Basel) Vol. 10; no. 6; p. 242
• Main Authors: Lu, He, Yi, Tingfeng, Tang, Yanke, Wang, Junjie, Zhang, Shun, Wang, Liang, Chen, Yutong, Shen, Yuncai, Dong, Liang, Zhang, Yangwei
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.06.2024
• Subjects: Accretion disks; blazars; Blazars (Astronomy); Cameras; Fourier analysis; Fourier transforms; Light; Oscillation; PKS 1440-389; Pluto; quasi-periodic oscillation; Software; Space telescopes; TESS; Wavelet transforms; China

We report the results of time series analysis of blazar PKS 1440-389, observed by the Transiting Exoplanet Survey Satellite (TESS) in two sectors. We find that the source has a quasi-periodic oscillation (QPO) of about 3.1 days for sector 11 and around 3.7 days for sector 38 in the optical band. We...