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Caption: Figure 2.
Long-term photometric and spectroscopic observations of TOI-1268 using KELT, TESS, and TRES. Only a fraction of the KELT and TESS light curves are presented due to the limited space. The stellar rotation period is clearly detected in KELT and TESS photometry in the Lomb–Scargle periodogram. Neither stellar rotation period nor planetary orbital period is detected in TRES data. Applying a rotational kernel in Gaussian Process (GP) on KELT, TESS, and TRES data (see Section 3), we infer the stellar rotation period as 10.84 ± 0.07 days, consistent with the periodogram results. The blue curves are predicted GP models, and the light blue curves are drawn from posteriors.
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© 2022. The Author(s). Published by the American Astronomical Society.
