Fig. 3
Vignetting expected at different off-axis angle for the two MOS detectors. The red, green, and blue lines represents the 0.7–1 keV, the 1–2 keV, and the 2–8 keV bands, respectively. The dashed black lines represents the typical off-axis angle where we would extract the background for our sample. It is clear how the background spectra could be vignetted up to a 20% factor.
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