Chandra MEG spectra of the X-ray binary XTE J1817-330 simultaneously fitted in the 11–25 Å region using the TBnew model. (a) ObsID 6615. (b) ObsID 6616. (c) ObsID 6617. (d) ObsID 6618. See Table 2 for further details pertaining to these observations. In each panel, the black data points are the observations, while the solid red lines correspond to the best-fit models. Residuals are shown as histograms for each case in units of χ ². Note the large residuals in the oxygen K-edge region, particularly in the neighborhood of the O i and O ii Kα lines at ≈23.50 Å and ≈23.35 Å, respectively.