curve is also similar to the low-rate state points from class $\theta$ (see Fig. 6). From Fig. 11, one can notice a continuity between state B and state A points, suggesting that the two states might not be completely different but rather part of the same state. This will be discussed extensively below.

Class $\delta$: and 
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An example of ligh curve, CD and HID for an observation in class $\delta$ is shown in Fig. 12 (lower panels). The light curve shows considerable ‘flaring’ variability. These variations are not accompanied by changes in X-ray colors, with the exception of a number of easily identifiable ’dips’, which correspond to a spectral softening. From the CD, we can identify the dips as occurrences of state , while the rest of the time the source is in state . It is noticeable that these state events are the only ones when the source approaches or becomes weaker than 10 kct/sec.

Class $\mu$
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Observations from class $\mu$ show, like some parts of observations in class $\lambda$, large flaring variability and a characteristic shape in the CD: it is elongated diagonally and bends towards higher HR$_2$ values in its lower part (see Fig. 13). 