Fig. B.1
Gain shift in the EPIC-pn. a) Fit to the Chandra data. The model is composed of a broken power-law, an emission line at 6.4 keV and two absorption lines for Fe xxv and Fe xxvi. The two HEG datasets are presented in different colors. b) Applying a model taken from the fit to the EPIC-pn data and applied to Chandra data reveals the shift towards higher energies. Applying a gain-shift of ~2% to the EPIC-pn data corrects the fit and re-produces the good fit in a). The line widths were kept fixed for plotting purposes.
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