Two examples, AA UMa (period: 0.4681258 days) and V346 Cen (period: 6.3219350 days) for the successive time series preprocessing steps (the black dots indicate the data taken from CALEB). The magnitudes for AA UMa are V magnitudes from Wang & Lu (1990), for V346 Cen, Strömgren y from Gimenez et al. (1986). Green solid line: the double Gaussian fit, blue solid line: double Gaussian + smooth spline fit, dashed lines: principal component reconstructions up to different orders. Gold: PC1-PC4 (95% of the total variation), orange: PC1-PC11 (99%), red: PC1-PC21 (99.9%), violetred: PC1-PC36 (99.999%). The light curves reconstructed from the PCA decomposition are scaled back from between [0, 1] to the original scale of the data.