Residuals of the fit of the time-averaged pn spectrum in the 0.3–10 keV band with the LP model (Sect. 3.1). Top panel: simple log-parabola. Middle panel: log-parabola plus blackbody. Bottom panel: log-parabola plus blackbody and a Gaussian emission line at 0.7 keV. The data were binned for plotting purposes.
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