Table 2: Summary of spectral fit parameters for the September 2003 observations.
Spectrum $N{\rm _H}$ $\alpha $ $\chi^2$/d.o.f. 0.5-10 keV flux
  (1022 atom cm-2)     (erg cm-2 s-1)

Sep. 11 (pre flare)
1.9 $\pm$ 0.5     8.8 $\times$ 10-13
Sep. 11 (flare) 4.3 $\pm$ 0.2 2.20 $\pm$ 0.09 151.6/151 4.0 $\times$ 10-11
Sep. 11 (post flare) 3.1 $\pm$ 0.3     9.7 $\times$ 10-12
Sep. 11 (all) 3.8 $\pm$ 0.4 2.25 $\pm$ 0.15 151.9/142 1.5 $\times$ 10-11
Sep. 17 (high) 2.0 $\pm$ 0.2 1.43 $\pm$ 0.09 430.3/347 3.9 $\times$ 10-11
Sep. 17 (low) 2.7 $\pm$ 0.2     1.1 $\times$ 10-10
Sep. 17 (all) 2.5 $\pm$ 0.2 1.42 $\pm$ 0.09 283.8/215 7.5 $\times$ 10-11


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