Solid black lines with error bars: light curves of hardness ratio of HD 189733 A obtained from pn events for each observation. Red and blue curves: Soft (0.3-1.0 keV) and hard (1.0-2.0) band light curves scaled between zero and the maximum of soft rate. As in Fig. B.2, the panels marked with a red border indicate observations where flares of HD 189733 B were detected. In these curves, we discarded the intervals relative to the flares of HD 189733 B.