Effect of the updated Suzaku-XIS calibration (20181010) on the residuals around the Si- and Au-edges. The residuals were calculated from our best fit to epoch I (upper panels) and epoch II (lower panels) as listed in Table 1. The energy ranges in gray mark the bins, which were ignored in the XIS1 spectra during spectral analysis (Sect. 3). For display purposes, the channel binning has been reduced by a factor of two as described in Sect. 2.