Fig. 1
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GLS periodogram of IRD and ESPRESSO RVs, and ESPRESSO activity indicators of TOI-521. The vertical grey shows the planetary period of TOI-521.01 at ~1.54. In the ESPRESSO RVs periodogram, the significant peak at f = 0.351 d−1 (~2.85 d) corresponds to the daily alias of the planetary period. The horizontal dashed, dash-dotted, and dotted lines show the 10,1, and 0.1% FAP levels, respectively.
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