Table 3: Fitted model parameters for EPIC spectra of HD 159176. The upper part of the table concerns the wabs $_{\rm ISM}$*wabs $_{\rm WIND}$*(mekal + mekal) model, whilst the bottom part summarizes the results for the wabs $_{\rm ISM}$*wabs $_{\rm WIND}$*(mekal + power) model. The $N_{\rm H}$ given in the table refers to the circumstellar (i.e. wind) column assumed to be neutral. The interstellar column density is frozen at $0.17\times 10^{22}$ cm-2 for all models. The Norm parameter of the mekal component is defined as $(10^{-14}/(4~\pi~D^2))\int{n_{\rm e}~n_{\rm H}~{\rm d}V}$, where D, $n_{\rm e}$ and $n_{\rm H}$ are respectively the distance to the source (in cm), and the electron and hydrogen densities (in cm-3), whereas for the power law this parameter corresponds to the photon flux at 1 keV. The error bars represent the 1 $\sigma $ confidence interval.
  $N_{\rm H}$ kT1 Norm1 kT2 Norm2 $\chi^2_\nu$
  (1022 cm-2) (keV)   (keV)   d.o.f.
MOS1 0.41 0.22 $2.04 \times10$-2 1.05 $1.51\times 10$-3 2.19
  $\pm $0.03 $\pm $0.04 $\pm $ $0.38 \times 10$-2 $\pm $0.02 $\pm $ $0.09\times 10$-3 197
MOS2 0.39 0.21 $2.11\times 10$-2 1.00 $1.58\times10$-3 2.65
  $\pm $0.03 $\pm $0.04 $\pm $ $0.40\times 10$-2 $\pm $0.02 $\pm $ $0.09\times 10$-3 198
pn 0.35 0.18 $1.88\times 10$-2 0.59 $2.98\times 10$-3 1.87
  $\pm $0.02 $\pm $0.03 $\pm $ $0.26\times 10$-2 $\pm $0.01 $\pm $ $0.17\times 10$-3 321
  $N_{\rm H}$ kT Norm1 $\Gamma$ Norm2 $\chi^2_\nu$
  (1022 cm-2) (keV)       d.o.f.
MOS1 0.26 0.30 $4.69\times 10$-3 4.01 $1.87\times 10$-3 1.65
  $\pm $0.02 $\pm $0.01 $\pm $ $0.84\times 10$-3 $\pm $0.09 $\pm $ $0.18\times10$-3 197
MOS2 0.24 0.29 $5.08\times 10$-3 3.80 $1.69\times 10$-3 1.99
  $\pm $0.02 $\pm $0.01 $\pm $ $0.89\times 10$-3 $\pm $0.08 $\pm $ $0.16\times10$-3 198
pn 0.28 0.28 $6.72\times 10$-3 4.09 $1.67\times 10$-3 1.70
  $\pm $0.01 $\pm $0.01 $\pm $ $0.80\times 10$-3 $\pm $0.08 $\pm $ $0.14\times 10$-3 321


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