Optics for X-ray telescopes: analytical treatment of the off-axis effective area of mirrors in optical modules
Optics for X-ray telescopes: analytical treatment of the off-axis effective area of mirrors in optical modules
Optical modules for X-ray telescopes comprise several double-reflection mirrors operating in grazing incidence. The concentration power of an optical module, which determines primarily the telescope's sensitivity, is in general expressed by its on-axis effective area as a function of the X-ray energy. Nevertheless, the effective area of X-ray mirrors in …