The three EPIC spectra (top, MOS1 in black, MOS2 in red, and pn in green) extracted in a circular region centered on π Aqr and the combined RGS spectrum (bottom). A close-up on the FeKα complex, with the positions of the three components shown by dotted lines, is included in the top panel. The EPIC data extracted in an annular source region (see Sect. 2) are similar, but noisier.