Figure 3. The C-K region for the source XTE
J1118+48. The data are plotted in 0.025 A bins in order to sample
the LETG resolution (0.05 A). The top panel shows the S3 data, from
the -1 order and the bottom panel shows the S4 data, from +1 order (note
error in the figure). The S3 detector is a BI chip, so the average
QE is much larger. Note that both data sets agree that the data should
be shifted by 0.5 eV relative to the model.