Light curves extracted from the STIS data for three spectral orders located around the beginning (21st spectral order; 2326.7–2365.8 Å; top), middle (11th spectral order; 2629.1-2673.3 Å; middle), and end (2nd spectral order; 2977.4–3027.3 Å; bottom) of the range covered by the data. Within each plot, the left panel is for the raw light curve, the two middle panels are for the data analysed using the ‘one jitter parameter’ (high and low polynomial order in time) analysis method, and the right panel is for the data analysed using the ‘multiple jitter parameter’ analysis method.