Fig. 5.
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Fit of the 2022 (black) and 2007#4 (red) 3−10 keV XMM-Newton-pn observations with a Galactic power-law plus two Gaussian lines: one broad and one narrow (see text). The 2007#4 spectrum displays an absorption feature (dotted line) at about 4σ below the continuum, while there is nothing apparent at a similar energy in the 2022 observation.
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