ASCA XRT Effective area, Angular Response and PSF
ASCA XRT effective area (one telescope) for different off-axis angle (theta) and azimuthal angle (phi).
Off-axis angular dependence of the XRT effective area (one telexcope) for two energies and two azimuthal angles.
Point spread function (PSF) of ASCA XRT for four different off-axis
Approximate field of view is shown for GIS (circle) and SIS (square).
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