\begin{table}   %t1
%\centering
\par
\caption{Parameters of the lines added to the reflection model (see 
text for details). Luminosities refer to the pure reflection case; in 
the reflection+power--law case they have to scaled by a factor 0.7.} \label{t1}
\begin{tabular}{lllll}   
\hline\hline    
Ion &$E_{\rm obs}$ & $E_{\rm rest}$ & $z$ & $L$ \\    
 & keV & keV &  & $10^{45}$ erg s$^{-1}$ \\   
\hline    
SiXIV& 0.71& 1.99 & 1.82 & 0.71 \\   
SXVI & 0.88& 2.60& 1.94 & 1.2\\   
ArXVII (SXV)& 1.08&  3.16 (3.14)& 1.93 (1.91) & 0.95 \\   
ArXVIII& 1.23& 3.30& 1.73& 0.95\\   
CaXX& 1.50& 4.07& 1.71&0.23\\   
\hline   
\end{tabular}   
\end{table}