Table 3: The X-ray model fit results.
  N4235 N4639 N5033 N5273
$N_{\rm H,{\rm Gal}}^\dagger$ 1.53 2.35 1 0.96
$N_{\rm H,{\rm int}}^\dagger$ $16\pm 1$ - - $94\pm4$
PL        
$\Gamma$ 1.61 1.86 1.70 1.44
  ($\pm 0.03$) ($\pm 0.04$) ($\pm 0.01$) ($\pm 0.03$)
$A^\ast$ 5.9 1.33 10.3 10.5+0.3-0.5
  ($\pm$0.2) ($\pm$0.04) ($\pm$0.1)  
GAUSS        
El[keV] 6.36 - 6.43 6.40
  ($\pm$0.02)   ($\pm$0.02) ($\pm$0.02)
EW[eV] 242 +124-108 - 275 +95-85 190+75-65
ABSORI        
$\xi^{a}$ - - - $26\pm 6$
MEKAL        
kT[keV] - - - 0.18
        $\pm$0.03
$\chi^2_{\rm red}$/d.o.f. 1.08/596 1.11/230 1.01/901 1.06/1042
$f_{\rm 2\mbox{-}10~keV}^{b}$ 2.8 42.7 4.3 6.3
$L_{\rm 2\mbox{-}10~keV}^{c}$ 4.8 0.17 1.2 2.3
Model fits were performed to the joint PN + MOS1+2 spectra in the 0.4-10 keV range. Errors are at the 90% level for one interesting parameter; $^\dagger$ in units of 1020 cm-2; $^\ast$ PL normalization at 1 keV in 10-4 photons cm-2 s-1 keV-1; a the ionization parameter which determines the absorber ionization state, and is defined as $\xi=L/(nR^2)$; b in units of 10-12 erg cm-2 s-1; c in units of 1041 erg s-1.

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