Top row: XMM-Newton EPIC spectra of HD 45314 in the high (left) and low (right) optical emission states. The black, red, and blue data points refer respectively to the MOS1, MOS2, and pn data. The continuous lines correspond to the best-fit 1-T thermal model including an extra Gaussian to fit the fluorescent Fe Kα line for the high state and the best-fit 2-T thermal model for the low state (see Table 3). The contributions of the various energy bins to the χ2 are given in the lower panels. The sign of δχ2 is set to the sign of the data minus the model. To ease comparison, both panels have the same horizontal and vertical axes. The arrow in the left panel points at the Fe Kα + Fe XXV and Fe XXVI lines (see Fig. 3). Bottom row, left panel: shows the Suzaku XIS spectra of HD 45314 taken in October 2014. The black, red, and blue data points refer respectively to the XIS0, XIS3, and XIS1 data. The continuous lines correspond to the best-fit 1-T thermal model including an extra Gaussian to fit the fluorescent Fe Kα line (see Table 3). Bottom row, right panel: unfolded best-fit models for the three epochs.
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