Rest-frame 3−9 keV spectra of PID 203 obtained from the Chandra ACIS observations during the C2, C3 and C4 intervals. The y-axis range is identical in the three plots. The dotted line indicates rest-frame 6.4 keV where a cold Fe K line is expected. The C2 spectrum shows apparently broad, strong Fe emission, the shape of which is reminiscent of that expected from a relativistic disk (e.g. Fabian et al. 1989, see text for details), while the C4 spectrum has a weak, narrow line. The C3 spectrum shows an Fe K feature weaker than that of C2, but also has a broad component as well as a narrow line. The line profile is strongly skewed redwards, which causes a single Gaussian fit to obtain a centroid energy significantly lower than 6.4 keV (see Fig. 10).