\begin{table}%t3
\caption{Lines from Systems C and D detected in the Keck spectrum.
\label{tab:syscd}} 
%\centerline
 {\begin{tabular}{lcccc}
\hline\hline
No.Line ID & \zabs & $b$ & $\log N$ & M05 ID \\
   & & (\kms) & (\cmsq) & \\
\hline
\multicolumn{5}{c}{System C $\zabs = 2.54$} \\
1.\HI\ \P& 2.53787\err0.00003 & 25.00 (fixed) & 15.659\err0.270	&	\\
1.\CIV & 2.53787\err0.00003 & 8.32\err4.25 & 13.510\err0.155	& 1; \CIV\\
\hline 
\multicolumn{5}{c}{System D $\zabs = 2.55$} \\
1.\HI & 2.55222\err0.00001 & 25.00 (fixed) & 13.569\err0.697 &	\\
1.\CIV & 2.55222\err0.00001 & 10.00 (fixed) & 12.585\err0.410 & 1; \CIV\\
\hline						     
2.\HI\ & 2.55383\err0.00015 & 25.00 (fixed) & 14.414\err1.474 &	\\
2.\CIV & 2.55383\err0.00015 & 10.00 (fixed) & 13.456\err0.790 &	2, \CIV\\
\hline						     
3.\HI\ \P& 2.55409\err0.00018 & 25.00 (fixed) & 16.042\err1.916 & \\
3.\CIV \P& 2.55409\err0.00018 & 14.45\err7.54 & 14.407\err0.863 & 3; \CIV\\
3.\SiIV& 2.55409\err0.00018 & 11.81\err8.00 & 12.850\err0.043 & 1; \SiIV\\
\hline
4.\HI\ \P& 2.55442\err0.00005 & 25.00 (fixed) & 14.865\err1.732 &	\\
4.\CIV \P& 2.55442\err0.00005 & 11.40\err3.96 & 15.200\err1.134 & 4; \CIV\\
4.\SiIV& 2.55442\err0.00005 & 10.64\err4.40 & 13.593\err0.085 & 2; \SiIV\\
4.\NV\ \# & 2.55442\err0.00005 & 38.57\err16.44& 13.191\err0.105 &	\\
\hline
\end{tabular}}
\par
\smallskip
\P\ -- Saturated line; 
\#\ -- likely blend of components 3 and 4.
\end{table}