\begin{table}%t4
\caption{\label{Q1331-t}Component structure of the $z_{\rm abs} = 1.776$ DLA system toward Q1331+17.} 
%\begin{center}
{\begin{tabular}{l c c c l c | l c c c l c}
\hline\hline
No. & $z_{\rm abs}$ & $v_{\rm rel}^*$ & $b (\sigma_b)$ & Ion & $\log N (\sigma_{\log N})$ & No. & $z_{\rm abs}$ & $v_{\rm rel}^*$ & $b (\sigma_b)$ & Ion & $\log N (\sigma_{\log N})$ \\
   &               & km s$^{-1}$     & km s$^{-1}$    &     &                            &    &               & km s$^{-1}$     & km s$^{-1}$    &     &                            
\\ 
\hline
\multicolumn{5}{l}{\hspace{0.3cm} Low-ion transitions} & & & & & & & \\
\hline
1 & 1.776336 & \phantom{1}$-$4 & 12.0{\scriptsize (0.3)} & \ion{Fe}{ii} &           13.90{\scriptsize (0.04)} &  4 & 1.776724 & $+$38 & 	  13.4{\scriptsize (0.8)} & \ion{Fe}{ii} & 14.07{\scriptsize (0.02)} \\
  &	     &  	       &                         & \ion{Cr}{ii} & \phantom{1}9.00{\scriptsize (0.25)} &    &	      &       & 				  & \ion{Zn}{ii} & 11.50{\scriptsize (0.06)} \\
  &	     &  	       &                         & \ion{Ni}{ii} &           12.82{\scriptsize (0.13)} &    &	      &       & 				  & \ion{Cr}{ii} & 12.22{\scriptsize (0.06)} \\
  &	     &  	       &                         & \ion{Mn}{ii} &           11.84{\scriptsize (0.06)} &    &	      &       & 				  & \ion{Ni}{ii} & 12.87{\scriptsize (0.04)} \\
  &	     &  	       &                         & \ion{Mg}{ii} &           11.00{\scriptsize (0.25)} &    &	      &       & 				  & \ion{Mn}{ii} & 11.91{\scriptsize (0.01)} \\
2 & 1.776370 &   \phantom{+1}0 & \phantom{1}9.8{\scriptsize (0.1)} & \ion{Fe}{ii} & 14.16{\scriptsize (0.02)} &    &	      &       & 				  & \ion{Si}{ii} & 14.60{\scriptsize (0.01)} \\
  &	     &  	       &                                   & \ion{Zn}{ii} & 12.35{\scriptsize (0.01)} &    &	      &       & 				  & \ion{S}{ii}  & 14.15{\scriptsize (0.11)} \\
  &	     &  	       &                                   & \ion{Cr}{ii} & 12.67{\scriptsize (0.01)} &    &	      &       & 				  & \ion{P}{ii}  & 12.41{\scriptsize (0.21)} \\
  &	     &  	       &                                   & \ion{Ni}{ii} & 12.89{\scriptsize (0.10)} &    &	      &       & 				  & \ion{N}{i}   & $<$$14.30$ \\ 	       
  &	     &  	       &                                   & \ion{Mn}{ii} & 12.04{\scriptsize (0.03)} &    &	      &       &           			  & \ion{Mg}{ii} & 14.99{\scriptsize (0.14)} \\
  &	     &  	       &                                   & \ion{Si}{ii} & 15.06{\scriptsize (0.01)} &  5 & 1.776859 & $+$53 & \phantom{1}5.5{\scriptsize (0.3)} & \ion{Fe}{ii} & 13.63{\scriptsize (0.05)} \\
  &	     &  	       &                                   & \ion{Ti}{ii} & 11.34{\scriptsize (0.10)} &    &	      &       & 				  & \ion{Zn}{ii} & 11.43{\scriptsize (0.04)} \\
  &	     &  	       &                                   & \ion{S}{ii}  & 14.88{\scriptsize (0.12)} &    &	      &       & 				  & \ion{Cr}{ii} & 12.12{\scriptsize (0.05)} \\
  &	     &  	       &                                   & \ion{P}{ii}  & 13.11{\scriptsize (0.04)} &    &	      &       & 				  & \ion{Ni}{ii} & 12.58{\scriptsize (0.05)} \\
  &	     &  	       &                                   & \ion{N}{i}   & $<$$15.16$                 &    &	      &       & 				  & \ion{Mn}{ii} & 11.33{\scriptsize (0.04)} \\
  &          &                 &                                   & \ion{Cl}{i}  & 12.90{\scriptsize (0.03)} &    &	      &       & 				  & \ion{Si}{ii} & 14.05{\scriptsize (0.03)} \\
  &	     &  	       &                                   & \ion{Mg}{ii} & 15.27{\scriptsize (0.12)} &    &	      &       & 				  & \ion{S}{ii}  & 14.05{\scriptsize (0.10)} \\
3 & 1.776538 &           $+$18 & \phantom{1}6.0{\scriptsize (0.3)} & \ion{Fe}{ii} & 13.46{\scriptsize (0.04)} &    &	      &       & 				  & \ion{P}{ii}  & 12.00{\scriptsize (0.30)} \\
  &	     &  	       &                                   & \ion{Zn}{ii} & 11.81{\scriptsize (0.02)} &    &	      &       & 				  & \ion{N}{i}   & $<$$12.82$ \\ 	       
  &	     &  	       &                                   & \ion{Cr}{ii} & 12.07{\scriptsize (0.04)} &    &	      &       &         			  & \ion{Mg}{ii} & 14.31{\scriptsize (0.26)} \\
  &	     &  	       &                                   & \ion{Ni}{ii} & 12.27{\scriptsize (0.10)} &  6 & 1.776964 & $+$64 & \phantom{1}9.4{\scriptsize (0.9)} & \ion{Fe}{ii} & 13.23{\scriptsize (0.07)} \\
  &	     &  	       &                                   & \ion{Mn}{ii} & 11.53{\scriptsize (0.02)} &    &	      &       & 				  & \ion{Si}{ii} & 13.92{\scriptsize (0.05)} \\
  &	     &  	       &                                   & \ion{Si}{ii} & 14.40{\scriptsize (0.01)} &    &	      &       & 				  & \ion{N}{i}   & $<$$13.33$ \\ 	       
  &	     &  	       &                                   & \ion{S}{ii}  & 14.27{\scriptsize (0.07)} &  & & & & & \\											       
  &	     &  	       &                                   & \ion{P}{ii}  & 12.19{\scriptsize (0.25)} &  & & & & & \\											       
  &	     &  	       &                                   & \ion{N}{i}   & $<$$13.60$                 &  & & & & & \\											       
  &          &                 &                                   & \ion{Cl}{i}  & 12.50{\scriptsize (0.06)} &  & & & & & \\
  &	     &  	       &                                   & \ion{Mg}{ii} & 14.52{\scriptsize (0.19)} &  & & & & & \\
\hline
1 & 1.776299 & \phantom{0}$-$8\phantom{.0} &           15.0{\scriptsize (1.0)} & \ion{Mg}{i} & 11.72{\scriptsize (0.07)} & 4 & 1.776684 & $+$34 & 8.6{\scriptsize (0.4)} & \ion{Mg}{i} & 11.83{\scriptsize (0.07)} \\
2 & 1.776365 & \phantom{0}$-0.5$           & \phantom{0}6.0{\scriptsize (0.2)} & \ion{Mg}{i} & 12.08{\scriptsize (0.03)} & 5 & 1.776814 & $+$48 & 9.1{\scriptsize (1.1)} & \ion{Mg}{i} & 11.85{\scriptsize (0.07)} \\
  &	     &                             &                                   & \ion{C}{i}  & 13.12{\scriptsize (0.02)} & 6 & 1.776947 & $+$62 & 3.0{\scriptsize (1.3)} & \ion{Mg}{i} & 11.39{\scriptsize (0.05)} \\
3 & 1.776523 &           $+$17\phantom{.0} & \phantom{0}3.4{\scriptsize (0.3)} & \ion{Mg}{i} & 11.77{\scriptsize (0.01)} & & & & & & \\
  &	     &  	                   &                                   & \ion{C}{i}  & 12.72{\scriptsize (0.02)} & & & & & & \\
\hline
\multicolumn{6}{l}{\hspace{0.3cm} Intermediate-ion transitions} & & & & & & \\
\hline
1 & 1.776036 &           $-$36 & 8.4{\scriptsize (0.4)} & \ion{Al}{iii} & 12.03{\scriptsize (0.02)} & 4 & 1.776694 & $+$35 &	       15.1{\scriptsize (1.4)} & \ion{Al}{iii} & 12.49{\scriptsize (0.04)} \\
2 & 1.776300 & \phantom{0}$-$7 & 8.1{\scriptsize (1.1)} & \ion{Al}{iii} & 12.29{\scriptsize (0.13)} & 5 & 1.776866 & $+$54 & \phantom{0}7.2{\scriptsize (0.5)} & \ion{Al}{iii} & 12.16{\scriptsize (0.06)} \\
3 & 1.776414 & \phantom{0}$+$5 & 7.8{\scriptsize (1.4)} & \ion{Al}{iii} & 12.29{\scriptsize (0.14)} & & & & & & \\
\hline\\[-2mm]
\end{tabular}}
\parbox{16.5cm}{
$^*$ Velocity relative to $z=1.776370$.}
%\end{center}
\par
\end{table}