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Fig. 4

Top panel: EPIC-pn spectral residuals for a power law emission plus Galactic absorption model fitted in the 3–10 keV band, for OBS1 (black) and OBS2 (red). Middle panel: same as above after the inclusion of a Gaussian emission line. Bottom panel: data/model ratio over the full energy band.
This figure is made of several images, please see below:
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