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Table 1:

Best fit spectral parameters for the persistent, the shallow-dipping, and the deep-dipping spectra fit simultaneously with the partial covering model.
Parameter Per. emission   Shallow dip   Deep dip
$N_{\rm H}^{\rm fore} ~(10^{22}$ cm-2)     $0.385 \pm 0.007$    
Photon index     $1.91 \pm 0.02$    
Norm.  (photons keV-1 cm-2 s-1)     $0.0117 \pm 0.0002$    
$N_{\rm H}^{\rm pow}~(10^{22}$ cm-2) 0.0 Fixed   $\rm 77_{-38}^{+67}$   $14 \pm 2$
Significance       2.7$\sigma$  
f 0.0 Fixed   $0.26 \pm 0.01$   $0.776 \pm 0.009$
Significance       >10$\sigma$  
Reduced $\chi^{2} = 1.55$ for 767 d.o.f.
The foreground hydrogen column density, $N_{\rm H}^{\rm fore}$, the photon index and the normalization of the power law are linked between persistent, shallow and deep-dipping emission. The covering fraction f and the hydrogen column density, $N_{\rm H}^{\rm pow}$, are allowed to vary to explain the spectral changes in the spectra. Uncertainties are given at a 90% confidence level. We also indicate the significance of the change of $N_{\rm H}^{\rm pow}$ and f between shallow and deep-dipping spectra.

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