Simultaneous fit to the XMM-Newton and Suzaku data (see Table 1). The data are best fit by an absorbed power-law component with an emission line at ~ 5.44 ± 0.05 keV. a) Count spectrum for all detectors fitted with an absorbed power law and a Gaussian emission line (models shown in gray). Ratio of data to model for a fit of an absorbed power law b) and including a Gaussian emission line c). d) Unfolded, combined spectrum of all data sets with the best-fit model (red). The shaded region highlights the position of the emission line.