Fig. A.1
Transmission of the Al (Detector #3/#1, top) and Mg (Detector #2/#1, bottom) filter when observing Scorpius X-1 during the trans-Earth coast flight of Apollo 15. Filter transmission of Al (top) and Mg (bottom) is given as a function of energy for different thicknesses obtained from http://henke.lbl.gov/optical_constants/ (Henke et al. 1993).
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