Notes. XSPEC model components, best-fit parameters, and 3− 20 keV model fluxes are shown for the four separate sub-intervals illustrated in Fig. 2 in order of decreasing model flux. As discussed in the text, an additional Wabs component (with equivalent hydrogen column density fixed to N_H = 1.59 × 10²² cm⁻²) was used to model the effects of interstellar absorption. Jointly fitted parameters assume the values quoted for OBS 3A. The parameter errors correspond to a Δχ² of 2.71.