The first (top) and third panels show spectra (red crosses) of the SW observation taken by XIS 1 with the best-fitting models (red solid lines). In the first panel, the model consists of the VAPEC (red dashed), PL (red dotted) and background (black dashed). In the third panel, the model is same as that in the top panel but it additionally includes two REDGE components with the edge energies of 1.189 keV (blue solid) and 1.34 keV (green solid). The second and fourth panels show the residuals of the data compared to the models. (Color online)