\begin{table}%T2
\caption{Results of search for \os\ systems toward \he\ and \rx.}\label{table_OVI}      
%\centerline
 {\small
\begin{tabular}{ccccccc}
\hline\hline   
 QSO  &\multicolumn{2}{c}{LOS A}&& \multicolumn{2}{c}{LOS B}& Class\\
       \cline{2-3} \cline{5-6}
 & $z_{\rm A}$ & Method$^a$ && $z_{\rm B}$ & Method$^a$& \\ 
\hline
  \he\  & 2.314201  & 1, 2 & &  2.314201& 1, 2  & Associated\\
        & 2.299304  & 1, 2 & &  2.299304& 1, 2  & Associated\\
        & 2.200800  & 1, 2 & &  2.200822& 1, 2  & II\\
        & 2.158112  & 1, 2 & &  2.158139& 1, 2  & II\\
        & 2.086682  & 1, 2 & &          &      & II\\
        &           &     & &  2.052440&   2  & II \\
        & 2.036100  & 3   & &          &      & III\\
        & 2.016083  & 3   & &          &      & III\\
        & 2.010473  & 2   & &  2.010452&   2  & II\\
  \rx\  & 2.776399  & 2   & &  2.776399& 2    & Associated \\
        &           &     & &  2.716287& 3    & III\\
        & 2.632495  & 1, 2 & &  2.632495& 1, 2  & I\\
        & 2.626749  &  1  & &          &      & II\\
        & 2.623886  &  1  & &          &      & II\\
        &           &     & &  2.602501& 3    & III\\
        & 2.577051  & 3   & &  2.573192& 3    & III\\
        & 2.517045  & 1, 2 & &  2.516961& 2    & I\\
        & 2.437271  & 1, 2 & &  2.437265& 2    & I\\
        & 2.431602  & 3    & &          &      & III\\
        & 2.418109  & 1, 2 & &  2.418124& 1    & III\\
        & 2.238486  & 3   & &          &      & III\\	   
	 \hline
\end{tabular}}\smallskip
\begin{list}{}{}
\item[$^a$] Method 1: \ho\ as a signpost; method 2: \cf\ as a
  signpost; method 3: blind \os\ search.
\end{list}
\end{table}