\begin{table}%t2
\par
\caption {\label{table:optdepth}Effective optical depths of the absorption
  systems seen in the spectrum of \secondqso.}
%\centerline
 {\begin{tabular}{lcc}
\hline \hline
Transition & $\zabs$ & $\taueff$ \\
\hline 
\lya & 5.93 & $\rm 3.59_{-0.41}^{+0.71}$ \\
\lya & 5.78 & $\rm 4.27_{-0.31}^{+0.45}$ \\
\lya & 5.63 & $\rm 3.35_{-0.11}^{+0.13}$ \\
\lya & 5.48 & $\rm 2.58_{-0.12}^{+0.14}$ \\
\lya & 5.33 & $\rm 3.21_{-0.13}^{+0.15}$ \\
\lya & 5.18 & $\rm 1.94_{-0.03}^{+0.03}$ \\
\lyb & 5.88 & $\rm 2.43_{-0.06}^{+0.06}$ \\
\hline
\end{tabular}}
\par
\smallskip
The \lyb\ optical depth
  has been corrected for \lya\ absorption using the relation found by
  \citet{Fan_etal:2006b}.
\end{table}