Table 3: Best-fit parameters of the 0.3-10 keV spectrum of the X-ray afterglow. The model is an absorbed power law ( xspec model: WABS POW).
Interval Start time Stop time $N_{\rm H}$ $\Gamma_{\rm x}$ Mean flux $\chi ^2$/d.o.f.
  (s) (s) (1021 cm-2)   (10-13 erg cm-2 s-1)  
A 7004 26 079 $\rm 4.5_{-1.0}^{+1.3}$ $\rm 2.05_{-0.24}^{+0.27}$ $24\pm4$ 11.0/16
B 29 217 54 833 $\rm 4.2_{-2.1}^{+3.2}$ $\rm 2.2_{-0.5}^{+0.6}$ $6.4\pm1.9$ 351.5 (63.4%)a
C 160 010 215 648 $\rm 3.4_{-1.4}^{+1.7}$ $\rm 2.2_{-0.4}^{+0.5}$ $5.6\pm1.4$ 320.4 (58.2%)a
BC 29 217 215 648 $\rm 5.0_{-1.9}^{+1.9}$ $\rm 2.5_{-0.5}^{+0.6}$ $4.5\pm1.5$ 12.4/9
BCD 29 217 765 966 $\rm 5.5_{-1.7}^{+2.1}$ $2.5\pm0.2$ $1.9\pm0.1$ 10.3/13
CD 160 010 765 966 $\rm 4.4_{-1.3}^{+2.1}$ $2.4\pm0.4$ $1.1\pm0.4$ 6.2/7
a Cash statistics (C-stat; Cash 1979) and percentage of Monte Carlo realisations that had statistic <C-stat. We performed 104 simulations. Photons were extracted from a circular region with a 10 pixel radius.

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