\begin{table}%t2
\caption{\label{watable}Best fit spectral parameters for the persistent, the shallow-dipping, and the deep-dipping spectra fit simultaneously with the ionized absorber model.}
\newcommand{\T}{\rule{0pt}{2.6ex}}
\newcommand{\B}{\rule[-1.2ex]{0pt}{0pt}}
%\begin{center}
{
\begin{tabular}{l c c c c c c}
\hline
\hline
\multicolumn{2}{l}{{Parameter}} \T \B & {Per. emission} & & {Shallow dip} & & {Deep dip} \\
\hline
\multicolumn{2}{l}{$N_{\rm H}^{\rm fore}~ (10^{22}$~cm$^{-2})$} \T & $0.410 \pm 0.007$ & & $0.420 \pm 0.009$ & & $0.45 \pm 0.03$ \\
\multicolumn{2}{r}{Significance} \T \B & & 1.4$\sigma$ & & 1.7$\sigma$ & \\
\multicolumn{2}{l}{Photon index} \T & & & $1.98 \pm 0.01$ & & \\
\multicolumn{2}{l}{Norm.~(photons ~keV$^{-1}$~cm$^{-2}$~s$^{-1}$)} \T & & & $0.0124 \pm 0.0002$ & &\\
\multicolumn{2}{l}{$\log(\xi)$~(erg ~s$^{-1}$~cm)} \T & 5.0 Frozen & & $\rm 2.52_{-0.07}^{+0.05}$ & & $2.29 \pm 0.02$ \\
\multicolumn{2}{r}{Significance} \T \B & & & & 5$\sigma$ & \\
\multicolumn{2}{l}{$N_{\rm H}^{\xi} ~(10^{22}$~cm$^{-2})$} \T \B & 0.32 Frozen & & $\rm 4.3_{-0.5}^{+0.4}$ & & $\rm 11.6_{-0.6}^{+0.4}$ \\
\multicolumn{2}{r}{Significance} \T \B & & & & $>$10$\sigma$ & \\
\hline
\multicolumn{7}{c}{Reduced $\chi^{2} = 1.42$ for 765 d.o.f.} \T \B \\
\hline
\end{tabular}}
%\end{center}
\par
\begin{list}{}{}
\item[Note:]The photon index and the normalization of the power law are linked between persistent, shallow and deep dipping. $N_{\rm H}^{\rm fore}$ is the foreground neutral hydrogen column density. $\xi$ is the ionization parameter. $N_{\rm H}^{\xi}$ is the warm absorber hydrogen column density. These parameters are allowed to vary to explain the spectral changes from persistent to deep dipping. Uncertainties are given at a 90\% confidence level. We also indicate the significance of the change of $N_{\rm H}^{\rm fore}$ between the three spectra as well as the significance of the change of $\log(\xi)$ and $N_{\rm H}^{\xi}$ between shallow and deep-dipping spectra.
\end{list} 
\end{table}