Simultaneous spectral fit to the five X-ray observations, including changes in a) the intrinsic continuum flux (left) and in b) the absorber in the line of sight (right). The top panel for each of them shows the spectral fitting for all the observations with different colours (see legend). The thermal, scattering, and intrinsic continuum components are also shown with dotted, dashed, and dot-dashed lines, respectively. The five panels below show the residuals for each of the observations separately.