\begin{table}%t2
\caption{\label{lines}\mbox{X-ray} lines.}
%\centerline
 {\small \begin{tabular}{lcc}
\hline \hline
ID & $z$ & $EW$   \\
  (1) & (2) & (3) \\
\hline
35   & 2.203   &  $<$490 \\
91   & 1.78$^{\star}$   &  $166^{\rm +251}_{-136}$ \\
92   & 0.91    &  $<$369             \\
107  & 2.48$^{\star}$   &  $278^{\rm +317}_{-195}$ \\
121  & 0.520    &  $<$291 \\
127  & 1.014  &  $<$550            \\
135  & 2.466    &  $<$2800            \\
171  & 1.993    &  $<$732           \\
190  & 2.005    &  $237^{\rm +479}_{-210}$  \\
191& 0.93$^{\star}$    &  $590^{\rm +422}_{-273}$  \\
\hline 
\end{tabular}}
\medskip
The columns  are: (1) Alexander ID number; (2)~redshift; an asterisk denotes \mbox{X-ray} redshift; (3)~$EW$ in eV of Fe line at rest-frame 6.4~keV. 
\end{table}