Figure 4. Modelling of the C-K edge region
using the data from XTE J1118+48. The top plot shows a simple model
consisting of a constant flux (at 100 counts/bin) multiplied by the carbon
absorption component of the OBF model, as decomposed. The optical
depth of the carbon component was increased by 13% to match the data in
the 0.283-0.2865 keV region. The data were then corrected by this
adjusted filter model to obtain the data in the lower plot. The residual
is a sharp edge recovering smoothly beyond 0.2870 keV.
to the C-K web page.