Table 6: Fit results on the X-ray spectrum from NGC 2903 (area 1).
Model $N_{\rm H}$ kT $\Gamma$ Z Norm Red. $\chi^2$ d.o.f. $F_{\rm X}$ $L_{\rm X}$
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RS $\rm0.50^{+0.16}_{-0.13}$ $\rm0.88^{+\infty}_{-0.04}$   1 2.7 3.8 27 $\rm0.78^{+0.07}_{-0.78}$ $\rm0.74^{+0.07}_{-0.74}$
RS $\rm 2.26^{+0.26}_{-0.23}$ $\rm 1.01^{+0.07}_{-0.08}$   0.1 16 1.4 27 1.31$\pm$0.01 1.24$\pm$0.01
BS $\rm 3.74^{+0.50}_{-0.45}$ $\rm0.74^{+0.11}_{-0.10}$     3.3 1.0 27 $\rm 1.90^{+0.16}_{-0.14}$ $\rm 1.80^{+0.15}_{-0.13}$
PO $\rm 6.01^{+0.78}_{-0.64}$   2.81$\pm$0.17   4.0 1.0 27 $\rm 4.79^{+1.25}_{-0.94}$ $\rm 4.54^{+1.18}_{-0.89}$
RS + PO $\rm 4.91^{+1.08}_{-0.92}$ $\rm0.57^{+0.25}_{-0.21}$ $\rm 2.61^{+0.26}_{-0.16}$   3.3 (PO) 0.9 25 $\rm 3.16^{+1.21}_{-0.52}$ $\rm 3.00^{+1.15}_{-0.49}$
        1 0.38 (RS)     (0.15$\pm$0.03) (0.14$\pm$0.03)
RS + PO $\rm 4.77^{+0.96}_{-0.77}$ $\rm0.55^{+0.29}_{-0.21}$ 2.56$\pm$0.37   3.1 (PO) 0.9 25 $\rm 2.95^{+1.62}_{-0.91}$ $\rm 2.80^{+1.54}_{-0.86}$
        0.1 3.5 (RS)     $\rm (0.30^{+0.01}_{-0.07}$) $\rm (0.28^{+0.01}_{-0.07}$)
RS + RS $\rm 2.68^{+0.82}_{-0.72}$ $\rm 4.34^{+\infty}_{-2.65}$   1 6.8 1.1 25 $\rm 1.50^{+0.42}_{-0.82}$ $\rm 1.42^{+0.40}_{-0.78}$
    $\rm0.31^{+0.17}_{-0.08}$   0.1 12     $\rm (0.76^{+0.21}_{-0.08}$) $\rm (0.72^{+0.20}_{-0.08}$)
1mm] RS + PO 6.98 (PO, fixed) $\rm0.87^{+\infty}_{-0.86}$ $\rm 3.12^{+0.47}_{-0.27}$   2.9 (PO) 1.0 26 $\rm 5.69^{+6.03}_{-2.04}$ $\rm 5.39^{+5.71}_{-1.93}$
  2.82 (RS, fixed)     0.1 4.5 (RS)     $\rm (0.40^{+0.01}_{-0.39}$) $\rm (0.38^{+0.01}_{-0.37}$)
Column (1): spectral models: BS = thermal Bremsstrahlung, RS = Raymond-Smith, PO = power law.
Column (2): column density in units of 1020 cm-2.
Column (3): plasma temperature in units of keV.
Column (4): photon index.
Column (5): metallicity in units of $Z_\odot $; fixed values.
Column (6): scaling factor: for BS in units of (10-18/(4$\pi D^2$)) $\int n_{\rm e}n_{\rm I}$dV, $n_{\rm e}, n_{\rm I}$ = electron and ion densities (cm-3); for RS in units of (10-18/(4$\pi D^2$)) $\int n_{\rm e}^2$dV, $n_{\rm e}, n_{\rm H}$ = electron and H I density (cm-3); for PO in units of 10-4 photons keV-1 cm-2 s-1 at 1 keV.
Column (7): reduced $\chi^2$.
Column (8): degrees of freedom.
Column (9): unabsorbed X-ray flux in units of 10-12 erg cm-2 s-1. Values in brackets give the contribution of the thermal component.
Column (10): X-ray luminosity in units of 1040 erg s-1. Values in brackets give the contribution of the thermal component. For the RS+RS model the values in brackets are for the low-temperature component.

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