ASCA GIS/SIS Performance:
GIS and SIS Effective Area and Energy Resolutions
Effective area of one XRT+GIS for different off-axis (theta) and
azimuthal (phi) angles
Effective area of one XRT+SIS for three standard pointing positions.
Energy resolution of GIS and SIS.
For SIS, measured or estimated energy resolutions of SIS1 in
the 1CCD mode are plotted
for at launch and 1, 2, 3, 4 and 5 years after the launch.
SIS0 resolution is degrading somewhat more slowly than that of SIS1.
In 2 and 4 CCD modes, the RDD effect further degrades the resolution