shown in Fig. 4. Panels (a), (b) and (c) in Fig. 4 are the HID, the light curve (restricted to the points used for CD/HID) and the CD respectively. The complete light curve of observation interval \#3 is shown in panel (d). Belloni et al. (1997a) identified in this observation (and then extended to all observations) three types of variability (“states"): a quiescent state at a relatively low count rate, an outburst state at high count rates, and a flare state in which the flux shows rapid alternations between the two. Hereafter, we will call the quiescent and outburst state and state respectively, and we will represent the corresponding points in all CDs, HIDs and light curves with squares and circles respectively. An example of these two states is clearly visible in Fig 4. These are the two main states corresponding to the absence and presence of a detectable inner part of the accretion disk ([@bel97a]). The points corresponding to the two states cluster in two well separated regions of the CD and HID. In the CD, state lies in the upper left part of the diagram, while state is located more towards the lower right, at a higher HR$_2$ 