Table 3: Best fit parameters for the power-law plus equilibrium model using the MOS and pn data all at once. The errors are in the range $\Delta \chi ^2 < 2.7$ (90% confidence level) on one parameter. The regions are shown in Fig. 8. Norm is given in units of photons/cm²/s/keV/arcmin² at 1 keV.
Region $\chi^2$ (d.o.f.) $N_{{\rm H}}$ (10²² cm^-2) $\Gamma$ Norm $kT_{{\rm e}}$ (keV) $\int n_{{\rm e}} n_{{\rm H}} \: {\rm d}l$ (cm^-5)

1 933 (907) 0.77 (0.74-0.80) 2.45 (2.39-2.52) 7.00e-5 (6.51-7.31) 0.48 (0.36-0.60) 8.75e15 (5.76-12.30)

2 504 (466) 0.70 (0.66-0.75) 2.83 (2.75-2.94) 8.43e-5 (8.07-9.49) 0.61 (0.58-0.66) 2.55e16 (1.77-3.48)

3 499 (493) 0.57 (0.53-0.60) 2.59 (2.51-2.70) 3.73e-5 (3.49-4.22) 0.76 (0.70-0.83) 1.72e16 (1.25-2.33)

4 532 (516) 0.92 (0.87-0.96) 2.34 (2.27-2.42) 9.67e-5 (8.59-9.97) 0.79 (0.62-1.01) 1.27e16 (0.53-2.00)

5 646 (630) 0.75 (0.73-0.77) 2.52 (2.47-2.56) 1.80e-4 (1.74-1.99) 0.54 (0.42-0.66) 1.45e16 (0.76-2.64)

6 717 (640) 0.89 (0.85-0.92) 2.40 (2.35-2.45) 2.59e-4 (2.45-2.77) 0.61 (0.47-0.69) 2.45e16 (1.56-3.48)

7 383 (354) 0.95 (0.89-1.02) 2.20 (2.12-2.27) 1.64e-4 (1.50-1.80) 0.28 ( $\leq$ 0.45) 1.08e16 (0.55-1.65)

8 807 (759) 1.13 (1.09-1.18) 2.58 (2.53-2.63) 3.32e-4 (3.12-3.54) 0.61 (0.43-0.73) 1.29e16 (0.66-1.82)

**Table 3:** Best fit parameters for the power-law plus equilibrium model using the MOS and pn data all at once. The errors are in the range $\Delta \chi ^2 < 2.7$ (90% confidence level) on one parameter. The regions are shown in Fig. 8. *Norm* is given in units of photons/cm²/s/keV/arcmin² at 1 keV.
Region	$\chi^2$ (d.o.f.)	$N_{{\rm H}}$ (10²² cm^-2)	$\Gamma$	Norm	$kT_{{\rm e}}$ (keV)	$\int n_{{\rm e}} n_{{\rm H}} \: {\rm d}l$ (cm^-5)
1	933 (907)	0.77 (0.74-0.80)	2.45 (2.39-2.52)	7.00e-5 (6.51-7.31)	0.48 (0.36-0.60)	8.75e15 (5.76-12.30)
2	504 (466)	0.70 (0.66-0.75)	2.83 (2.75-2.94)	8.43e-5 (8.07-9.49)	0.61 (0.58-0.66)	2.55e16 (1.77-3.48)
3	499 (493)	0.57 (0.53-0.60)	2.59 (2.51-2.70)	3.73e-5 (3.49-4.22)	0.76 (0.70-0.83)	1.72e16 (1.25-2.33)
4	532 (516)	0.92 (0.87-0.96)	2.34 (2.27-2.42)	9.67e-5 (8.59-9.97)	0.79 (0.62-1.01)	1.27e16 (0.53-2.00)
5	646 (630)	0.75 (0.73-0.77)	2.52 (2.47-2.56)	1.80e-4 (1.74-1.99)	0.54 (0.42-0.66)	1.45e16 (0.76-2.64)
6	717 (640)	0.89 (0.85-0.92)	2.40 (2.35-2.45)	2.59e-4 (2.45-2.77)	0.61 (0.47-0.69)	2.45e16 (1.56-3.48)
7	383 (354)	0.95 (0.89-1.02)	2.20 (2.12-2.27)	1.64e-4 (1.50-1.80)	0.28 ( $\leq$ 0.45)	1.08e16 (0.55-1.65)
8	807 (759)	1.13 (1.09-1.18)	2.58 (2.53-2.63)	3.32e-4 (3.12-3.54)	0.61 (0.43-0.73)	1.29e16 (0.66-1.82)

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