Top panel: periodogram computed with the help of the Transit Least Squared (TLS) python package (Hippke & Heller 2019) applied to the time series made by the residuals of the entire Spitzer photometric (cleaned from all known transits). The x-axis is the period while the y-axis is the SignalDetection Efficiency (SDE) associated with each period. A steel-blue line indicates the harmonic for which the SED reached is the largest, here this output period is 15.74 days. Bottom panel: phase-folded transit signal for the most probable period output by the periodogram (blue dots) + transit model computed from the parameters output by the TLS algorithm (red solid line).