Table 1: Best-fit parameters for a power-law model in the case of the PN, MOS2 and PN+MOS2 data.
Instrument $N_{\rm H}$ Photon Normalization at 1 keV $\chi^{2}_{\nu}$ d.o.f. $f_{\rm X}$ (0.3-10 keV)a
  ( $\times10^{21}$ cm-2) index (ph keV-1 cm-2 s-1)     (erg cm-2 s-1)
PN 3.6 $\pm$ 0.2 1.92 $\pm$ 0.04 (9.9 $\pm$ 0.5) $\times 10^{-4}$ 1.104 297 (3.7 $\pm$ 0.2) $\times 10^{-12}$
MOS2 4.5 $\pm$ 0.3 1.99 $\pm$ 0.07 (11.2 $\pm$ 0.9) $\times 10^{-4}$ 1.131 146 (3.7 $\pm$ 0.3) $\times 10^{-12}$
PN+MOS2 3.8 $\pm$ 0.2 1.94 $\pm$ 0.04 (10.3 $\pm$ 0.3) $\times 10^{-4}$ 1.069 442 (3.7 $\pm$ 0.1) $\times 10^{-12}$
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Note -- Errors are at 90\% c.l. for a single interesting parameter; $^{a}$\space {absorbed flux}.}$


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