Illustration of reflected region background estimation for spectra (Sect. 4.11.1). The HGPS significance image is shown in inverse grayscale and exclusion regions as blue contours. The analysis FoV for one observation is shown as a black circle with 2° radius and a black cross at the observation pointing position. The non-filled red circle illustrates the ON region for spectral analysis; the filled red circles indicate the OFF regions.
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