Blackbody photon flux and the powerlaw photon flux required to model the data when both components are present. The outburst data with full PCA coverage are plotted as: 2003 (red), 2009 (cyan), 2010b (black), and 2011 (orange). The different regions (I−IV) represent the validity of the current model and possible modifications (see text for details). The data point marked by a small ellipse corresponds to the highest peak of the 2003 outburst and was modelled by the modified two-component model (see Fig. 14).