Fit over the 0.3–10 keV energy range of the four 2014 XMM-Newton/pn spectra with the baseline Comptonization model (model ℬ). The fit parameters are reported in Table 4. Black: March 18, red: March 20, green: March 22, and blue: March 24. Top panel: data and data/model ratio. Bottom panel: unfolded spectra where the contributions of the model components are displayed. The following color code for the emission components (dot-dashed curves) is used: magenta for the soft Comptonization (comptt), blue for the cut-off power-law (hot Comptonization). For clarity purposes, we have not displayed the Fe K line components.