\begin{table}%T1
\par
%\centering
\par
\caption{The absorption systems studied in this paper.}\label{tab:zabs}
\begin{tabular}{lcc}
\hline\hline
 System & $z_{\rm abs}$     & {\it FWHM} \\
\hline
 A1 & 2.29071 $\pm$ 0.00004 & 174  \\
 A2 & 2.28724 $\pm$ 0.00002 &  27  \\
 A3 & 2.28626 $\pm$ 0.00003 &  62  \\
 B1 & 2.05844 $\pm$ 0.00002 & 104  \\
 B2 & 2.05740 $\pm$ 0.00003 &  24  \\
\hline
\end{tabular}
\end{table}