Detection of Quasiperiodic Oscillations in the Blazar PKS 0735+178 with TESS
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ID: 319928
2026
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Abstract
Abstract We report here the detection of signatures of a quasiperiodic oscillation (QPO) and a short flare in the optical light curve of the blazar PKS 0735+178, observed in two sectors, 71 and 72, spanning around 49 days with the Transiting Exoplanet Survey Satellite. The modest flare in sector 71 lasted ~4.3 days and appears as a combination of two sub-flares. In sector 72, a transient QPO with a period ~11.2 hours is detected at local and global significance levels of 4.11σ and 3.06σ, respectively. We used weighted wavelet z transform, Lomb-Scargle periodogram, and phase dispersion minimization analysis techniques to look for and confirm the QPO feature. We also performed a segment-wise statistical inspection of these light curves and discuss here possible mechanisms that could explain the observed flux behavior.
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| Authors | Shubham Kishore, Alok C. Gupta, Paul J Wiita, Sandeep Kumar Mondal, M Vivek |
| Journal | monthly notices of the royal astronomical society |
| Year | 2026 |
| DOI |
10.1093/mnras/stag1284
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| URL | |
| Keywords | Keywords not found |
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