Table 6: Model parameters for a two-temperature mekal model fitted to the RGS1 and RGS2 spectra of HD 159176, to the three EPIC spectra considered simultaneously and finally to all the XMM data taken together. The adopted model is wabs $_{\rm ISM}$*wabs $_{\rm WIND}$*(mekal + mekal). The column density given in the Table refers to the local (i.e. circumstellar) absorption. The interstellar column density is frozen at $0.17\times 10^{22}$ cm-2. 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.
RGS1 0.32 0.16 $1.66\times 10^{-2}$ 0.62 $3.96\times 10^{-3}$ 1.36
  $\pm $0.11 $\pm $0.01 $\pm $ $1.70\times 10$-2 $\pm $0.04 $\pm $ $1.81 \times 10$-3 61
RGS2 0.27 0.16 $1.37 \times 10$-2 0.59 $2.67\times 10$-3 1.45
  $\pm $0.09 $\pm $0.01 $\pm $ $0.26\times 10$-2 $\pm $0.03 $\pm $ $1.05\times 10$-3 71
EPIC 0.40 0.21 $2.19\times 10$-2 0.97 $1.48\times10$-3 2.41
  $\pm $0.14 $\pm $0.02 $\pm $ $0.23\times 10$-2 $\pm $0.01 $\pm $ $0.05 \times10$-3 726
EPIC 0.40 0.21 $2.22\times 10$-2 0.96 $1.54\times 10$-3 2.28
+ RGS $\pm $0.01 $\pm $0.02 $\pm $ $0.22 \times10$-2 $\pm $0.01 $\pm $ $0.05 \times10$-3 862


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