Outlier selection and removal for 4U 1705-44. Left: histogram of residuals after the first pass of GP smoothing. We choose the cutoff (red bands) at 4σ, where residuals begin to significantly deviate from the main distribution. Right: rebinned data points overlaid with the initial GP-smoothed light curve. Outlier points are marked in red. Outliers comprise 22 of the 4345 points (0.5%).