Spectra of XMMU J173029.8–330920 fitted with various partially absorbed models plus a Gaussian component at ∼6.4 keV. The black, red, green, and blue data points are from EPIC-pn, MOS2, FPMA, and FPMB detectors; tbabs and tbpcf represent the Galactic and partial absorption component; and po (a simple power law) and apec (a collisionally ionised diffuse gas) are the two continuum models tested in the spectral modelling. More details are given in Sect. 3.1.