Figure 2:
Factors that determine the SXT effective area. Panel (a) shows
the double entrance filter transmission; panel (b) shows the mirror reflectivity
including the obscuration from the support structures; panel (c) shows the
CCD quantum efficiency. Panel (d) is the product of panels (a), (b), and (c).
Figure 3:
The effective area of the SXT: The thick curve shows gives the
effective area for the indicated filter. The thin curve is the open filter case (no
analysis filter) effective area over-plotted for comparison.
Figure 4:
The total SXT signal as a function of 
for the
open filter and the analysis filters as indicated. NOTE: Be and Al12
are mistakenly reversed in Tsuneta et al., (1991).
Figure 5:
Ratios of the SXT response functions. For the curve marked
``Be119/(2
Al12)'' the effective observing time with the Al12 filter has
been doubled with respect to the Be119 filter.
For the curve marked ``
Al12/Al.1'' the effective observing time with the
Al12 filter has again been doubled, this time with respect to the Al.1 filter.
The SXT response functions have been characterized for a solar thermal spectrum as observed in each of the SXT analysis filters. The SXT is a broad-band instrument and is sensitive over a range of energies between approximately 0.28 and 4 keV. The analysis filters have been carefully selected so that their intensity ratios are diagnostics of temperature.