Table 4: Time-resolved spectroscopy of $\sigma $ Ori E. Errors are 90% confidence ranges for one interesting parameter.

Interval		 T1 T2 EM1/1053 EM2/1053 $Z/Z_\odot$ $\chi^2_r$/d.o.f. Fx a/10-12 Lx a/1031 tc b $\Delta t$
  (keV) (keV) (cm-3) (cm-3)     (erg cm-2 s-1) (erg s-1) (h) (h)

Quiescent		 $\rm0.31_{-0.06}^{+0.10}$ $\rm 1.06_{-0.22}^{+0.21}$ $\rm 7.09_{-2.33}^{+4.12}$ $\rm 6.21_{-1.82}^{+3.59}$ $\rm0.09_{-0.06}^{+0.10}$ 1.00/26 0.59 0.88 12.3 3.6

Peak		 $\rm0.80_{-0.07}^{+0.15}$ $\rm 3.52_{-0.37}^{+0.40}$ $\rm 3.62_{-1.14}^{+1.99}$ $\rm 34.88_{-2.38}^{+3.74}$ $\rm0.73_{-0.27}^{+0.31}$ 0.68/101 3.06 4.54 15.5 1.7

Decay		 $\rm0.75_{-0.10}^{+0.07}$ $\rm 3.25_{-0.30}^{+0.41}$ $\rm 6.35_{-2.30}^{+6.08}$ $\rm 32.25_{-2.33}^{+2.49}$ $\rm0.30_{-0.06}^{+0.06}$ 0.91/129 2.64 3.91 17.5 2.5
a Unabsorbed flux and luminosity in the ROSAT (0.1-2.4 keV) band. $L_{\rm X}$ has been computed assuming d=352 pc.
b Central time of the intervals in hours from JD 2 452 357.

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