Figure 11
X-ray energy spectrum. The fraction of this spectrum which falls within the energy acceptance band is shown in green. The hatched bands represent X-rays which are eliminated because of the angular cutoff. Left panels correspond to negative, right ones to positive. (a) and (b) illustrate the cases where 0 < < , (c) and (d) where < < bw, and (e) and (f) where bw < < bw + . |