In each figure, the top panel shows the 0.5–5 keV spectrum with the best-fit model superimposed. The middle panel shows the fit residuals for a power-law-only spectral model, and the bottom panel shows the fit residuals when a disk blackbody model is included. The best-fit spectral parameters are shown in bold in Table 1. Panel (a) shows the time-averaged spectrum for the entire observation (power law + disk blackbody favored), panel (b) shows the first 20 ks (best fit by a power-law-only model), panel (c) shows the middle 20–40 ks (power law + disk blackbody favored), and panel (d) shows the final portion of the exposure from 40 ks until the end of the observation (power law + disk blackbody favored).