is indeed plausible that the M-shaped intervals are consistent with being state (at a slightly higher HR$_1$ and much higher count rate), and that the low-flux points cannot be identified with state , being much softer. Since these soft points cannot be assigned to either of the two states, we define a new state (state ). In all the CDs, the points corresponding to this state will be marked with diamonds. During the ‘flares’ in the low-flux intervals, in the CD the source moves back almost to the state points.

State is characterized by consisting of low-flux, soft intervals, as opposed to state , which is low-flux and hard. The presence of this additional state is very evident in an observation like that shown in Fig. 6, but in retrospect it could of course be present also in other observations. Going back to Fig. 4, we notice that at the end of a long state period (see Fig. 4d) there is a short ($<$10s) dip. This dip corresponds to soft points in the CD (diamonds in Fig. 4c) which at the bottom of the dip reach the same position as those in Fig. 6. We find that in observations of 