Fig. 14
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Athena SPO simulation. (left) Close-up view of the mirror modules composing the Geant4 SPO mass model. SPO X-ray effective area (centre) and vignetting (right) simulated in ray-tracing (in red) and compared with the official results (in blue) reported in ATHENA – Telescope Reference Design and Effective Area Estimates, ESA-ATHENA-ESTEC-PL-DD001, Issue 3.3, 21/12/2020.
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