Gaussian process regression of the AIT photometry using a quasi-periodic kernel. Left: AIT light curve (black points) together with the median GP posterior model (blue line) and its 1σ credibility interval (shaded blue). Right: Posterior distribution of the stellar rotation period obtained from the GP kernel’s periodic hyperparameter. The dashed line shows a Gaussian fit to the mode of the distribution, and the grey shaded region marks the P_rot interval predicted by the relations of Suárez Mascareño et al. (2016).