Light curve of KIC2141852 (upper panel) and positions of inflection points for each Kepler quarter (lower panel). Kepler quarters 2–16 are numbered in the upper panel and separated by the vertical black lines. Asterisks in the lower panel correspond to the positions of inflection points. Value of the outlier-resistant mean of the inflection point positions in the low-period branch (see text for more details) is indicated by the horizontal black line. Red asterisks correspond to the inflection points utilized for calculating the outlier-resistant mean value, blue asterisks are trimmed as outliers. Rotation period ranges returned by our method (P_GPS) and period from Reinhold et al. (2013) (P_R2013) are listed in the lower panel.