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Table 4:

Spectral parameters of the best-fit models to the average spectra of IGR 0023. Errors are given at the $90\%$ confidence level.
  $N_{{\rm H}}$a $N_{{\rm H}}$b $C_{\rm F}$c AZd $\alpha$e k T1 C1f k T2 C2g k T3h C3i EWj $\chi_{\nu}^2$
            (keV)   (keV)   (kev)   (eV) ($\chi^2$ / d.o.f.)
A $1.79 \pm 0.07$ $0.8 \pm 0.2$ $0.39_{\rm -0.06}^{+0.05}$ $0.7 \pm 0.2$ $1.8_{\rm -0.4}^{+0.6}$         $28_{\rm -11}^{+19}$ $1.7_{\rm -0.5}^{+1.3}$ $100_{\rm -25}^{+30}$ 0.86 (892/1033)
B $2.0 \pm 0.1$ $1.1_{\rm -0.2}^{+0.3}$ $0.44 \pm 0.04$ $0.5 \pm 0.1$   $0.17_{\rm -0.04}^{+0.02}$ $3.0_{\rm -1.7}^{+3.3}$ $14 \pm 2$ $5.2_{\rm -0.3}^{+0.2}$     $100_{\rm -29}^{+24}$ 0.86 (886/1032)
C $2.0 \pm 0.1$ $0.9_{\rm -0.2}^{+0.3}$ $0.36 \pm 0.06$ $0.7_{\rm -0.2}^{+0.3}$   $0.17_{\rm -0.05}^{+0.03}$ $1.5_{\rm -1.0}^{+2.3}$ $9_{\rm -3}^{+2}$ $2.1_{\rm -0.9}^{+1.5}$ >27 $0.3 \pm 0.1$ $94_{\rm -27}^{+24}$ 0.85 (870/1030)
a Column density of the total absorber in units of $10^{21}~{\rm cm}^{-2}$; b column density of the partial absorber in units of  $10^{23}~{\rm cm}^{-2}$; c covering fraction of the partial absorber; d metal abundance; e index of the power-law emissivity function of the CEMEKL component; f normalization constant of the first optically thin plasma component in units of 10-4; g normalization constant of the second optically thin plasma component in units of 10-3; h in model A this the maximum temperature of the CEMEKL; i normalization constant of the third optically thin plasma component (CEMEKL in model A) in units of 10-2; j equivalent width of the 6.4 keV Fe line.

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