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Fig. 1

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Upper panel: the 2–11 keV spectrum of IRAS 18325–5926 obtained from the EPIC pn camera. The vertical axis is in flux units (EFE) and the horizontal axis is the energy (keV) as observed. The spectrum is plotted in 200 eV intervals. Two possible blueshifted Fe K absorption features are marked by red arrows. Lower panel: details of the Fe-K band spectrum with 90-eV energy intervals. The dotted and solid line histograms show the best-fit models with xillver (log ξR ~ 3.5) and reflionx (log ξR ~ 3.2), respectively. No relativistic blurring is included. The resolved narrow line cores of Fe xxv and Fe xxvi of xillver do not agree with the smooth, broad profile of the data, whereas the reflionx model fits well (see text). A narrow line feature is seen at the observed energy at the rest-frame 6.4 keV, as indicated by the vertical dotted line.

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