\begin{table}%t3
%\centering
\par
\caption{\label{tab-fit-xmm}Results from the VPSHOCK+VPSHOCK model fits.}
\begin{tabular}{lrrrr}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{l}{Parameter} &
\multicolumn{1}{c}{May 2003}&
\multicolumn{1}{c}{Jan. 2007}&
\multicolumn{1}{c}{Jan. 2008}&
\multicolumn{1}{c}{Jan. 2009}\\				
\noalign{\smallskip}\hline\noalign{\smallskip}	\vspace{1mm}
$kT_{1}$(keV)		& $\rm 0.41_{-0.01}^{+0.01}$	& $\rm 0.52_{-0.003}^{+0.002}$	& $\rm 0.53_{-0.001}^{+0.002}$	& $\rm 0.54_{-0.001}^{+0.002}$\\		
$kT_{2}$(keV)		& $\rm 2.89_{-0.19}^{+0.19}$	& $\rm 2.43_{-0.06}^{+0.06}$		& $\rm 2.50_{-0.05}^{+0.05}$		& $\rm 2.38_{-0.05}^{+0.04}$	\\ \vspace{1mm}
$EM_{1}$\tablefootmark{a}		& $\rm 4.09_{-0.1}^{+0.1}$	& $\rm 17.83_{-0.12}^{+0.11}$	& $\rm 23.45_{-0.12}^{+0.13}$	& $\rm 28.37_{-0.14}^{+0.15}$	\\ \vspace{1mm}
$EM_{2}$\tablefootmark{a}		& $\rm 1.06_{-0.03}^{+0.03}$	& $\rm 2.95_{-0.05}^{+0.04}$		& $\rm 3.91_{-0.05}^{+0.06}$		& $\rm 4.91_{-0.07}^{+0.05}$	\\ \vspace{1mm}	
$\tau_{{\rm u,}1}$\tablefootmark{b}	& $\rm 3.25_{-0.26}^{+0.29}$	& $\rm 4.82_{-0.12}^{+0.14}$		& $\rm 6.03_{-0.14}^{+0.19}$		& $\rm 6.86_{-0.18}^{+0.21}$	\\ \vspace{1mm}	
$\tau_{{\rm u,}2}$\tablefootmark{b}	& $\rm 1.33_{-0.1}^{+0.12}$	& $\rm 1.93_{-0.1}^{+0.11}$		& $\rm 2.02_{-0.1}^{+0.09}$		& $\rm 2.22_{-0.09}^{+0.13}$	\\ \vspace{1mm}	
$\sigma_0$(eV)		& $\rm 3.51_{-0.94}^{+1.11}$	& $\rm 1.51_{-0.4}^{+0.25}$		& $\rm 1.58_{-0.29}^{+0.31}$		& $\rm 1.43_{-0.29}^{+0.33}$	\\ \vspace{1mm}	
$\alpha$		& $\rm 1.10_{-0.76}^{+0.74}$	& $\rm 2.64_{-0.45}^{+0.69}$		& $\rm 3.15_{-0.63}^{+0.43}$		& $\rm 3.10_{-0.52}^{+0.6}$	\\		\hline
\end{tabular}
\tablefoot{Errors for $\Delta\chi^2=2.71$ confidence range.\\
\tablefoottext{a}{$EM = \int n_{\rm e} n_{\rm H} {\rm d}V$  in $10^{58}$~cm$^{-3}$, a distance of 50~kpc is assumed.}\\
\tablefoottext{b}{$\tau_{\rm u}$: upper limit on the ionization time range in $10^{11}$ cm$^{-3}$ s.}}
\end{table}