Combined EPIC-pn + MOS(1,2) spectra of the six spectral states extracted from the HID (see text and Fig. 7). The colour convention is the same as indicated in Fig. 6-top. The best fit is given by the TBABS(DISKBB + DISKPBB + CUTOFFPL) model (see Table 2), where the DISKBB, DISKPBB and CUTOFFPL models are indicated with dashed, dot-dashed and dotted lines, respectively. In the bottom panel of each plot, it is shown the ratio of data and model.