Fig. 5
Flux ratio between RGS1 and RGS2 for parts of the spectrum that are detected by both RGS. Different symbols indicate different combinations of CCD chips for both RGS detectors. Open symbols: RGS1 chips 1, 3, 5, 9; filled symbols: RGS1 chips 2, 4, 6, 8. Triangles: RGS2 chips 1, 3, 5, 7, 9; circles: RGS2 chips 2, 6, 8. The solid line is a simple fit to the ratio’s using a constant plus Gaussians.
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