Data (black) and best-fit model (blue) for three of the Chandra HSS spectra, representative of three statistics regimes. From left to right: ObsID 431 C (least counts), 14517 A (intermediate counts), and 12831 A (highest counts). The dashed vertical lines indicate the energies of the emission and absorption lines found by adopting the blind-search method of Tombesi et al. (2010). Only those above 90% confidence were included in the best-fit models (i.e., those in Tables 4a and 4b).