TESS photometric rotation signature of GJ 617A. Top panel: Zoom-in view of the phase-folded 2-min cadence TESS light curve of GJ 617A considering a period of 10.4 days. Grey and red symbols indicate the 2-min cadence and 1-day binned TESS data, respectively. The solid line represents the best sinusoidal fit to the data. Bottom panel: GLS periodogram of the 1-day binned 2-min cadence TESS light curve. Horizontal lines indicate different FAP values.