Analysis of TESS light curve for stellar rotation of TOI-1416. The top panel shows the light curve from Sector 16 and 23 that was used for the analysis. The following panels show the three methods used for the period determination (see the main text): the GWPS and its projection onto the period axis; the ACF; and the composite spectrum (CS). The hatched region in the panel for the GWPS indicates the zone where the method is not valid.