\begin{table}%t5
\caption{Component structure of the $z_{\rm abs} = 2.066$ DLA system toward Q2231$-$00.\label{Q2231-t}} 
%\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 & 2.064746 &            $-$138 & \phantom{0}6.6{\scriptsize (0.5)} & \ion{Fe}{ii} & 13.06{\scriptsize (0.04)}	& 8  & 2.065887 &	     $-$27 & 4.9{\scriptsize (0.1)} & \ion{Fe}{ii} & 13.41{\scriptsize (0.02)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.53{\scriptsize (0.12)}	&    &  	&		   &			    & \ion{Si}{ii} & 13.87{\scriptsize (0.01)} \\
2 & 2.064897 &            $-$123 & \phantom{0}9.0{\scriptsize (0.7)} & \ion{Fe}{ii} & 13.20{\scriptsize (0.07)} &    &  	&		   &			    & \ion{S}{ii}  & 13.80{\scriptsize (0.26)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.79{\scriptsize (0.06)}	&    &  	&		   &			    & \ion{N}{i}   & 13.59{\scriptsize (0.22)} \\
3 & 2.065087 &            $-$105 &           13.8{\scriptsize (1.4)} & \ion{Fe}{ii} & 13.58{\scriptsize (0.04)} & 9  & 2.066072 & \phantom{0}$-$9  & 5.5{\scriptsize (0.4)} & \ion{Fe}{ii} & 14.00{\scriptsize (0.05)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.97{\scriptsize (0.10)}	&    &  	&		   &			    & \ion{Zn}{ii} & 11.71{\scriptsize (0.06)} \\
4 & 2.065266 & \phantom{0}$-$88  & \phantom{0}8.6{\scriptsize (0.2)} & \ion{Fe}{ii} & 14.19{\scriptsize (0.01)} &    &  	&		   &			    & \ion{Cr}{ii} & 12.12{\scriptsize (0.08)} \\
  &          &  	         &                                   & \ion{Zn}{ii} & 11.63{\scriptsize (0.04)} &    &  	&		   &			    & \ion{Ni}{ii} & 12.73{\scriptsize (0.03)} \\
  &	     &  	         &                                   & \ion{Cr}{ii} & 12.46{\scriptsize (0.03)} &    &  	&		   &			    & \ion{Mn}{ii} & 11.92{\scriptsize (0.05)} \\
  &	     &  	         &                                   & \ion{Ni}{ii} & 13.04{\scriptsize (0.10)} &    &  	&		   &			    & \ion{Si}{ii} & 14.59{\scriptsize (0.04)} \\
  &	     &  	         &                                   & \ion{Mn}{ii} & 11.97{\scriptsize (0.03)} &    &  	&		   &			    & \ion{Ti}{ii} & 11.88{\scriptsize (0.18)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 14.57{\scriptsize (0.04)} &    &  	&		   &			    & \ion{S}{ii}  & 14.33{\scriptsize (0.13)} \\
  &	     &  	         &                                   & \ion{S}{ii}  & 14.19{\scriptsize (0.13)} &    &  	&		   &			    & \ion{P}{ii}  & $<$$ 12.81$ \\
  &	     &  	         &                                   & \ion{P}{ii}  & $<$$12.90$                 &    &  	&		   &			    & \ion{N}{i}   & 14.43{\scriptsize (0.06)} \\
  &	     &  	         &                                   & \ion{N}{i}   & 13.95{\scriptsize (0.11)} & 10 & 2.066161 & \phantom{$-$00}0 & 3.8{\scriptsize (0.2)} & \ion{Fe}{ii} & 14.26{\scriptsize (0.03)} \\
5 & 2.065422 & \phantom{0}$-$72  & \phantom{0}4.2{\scriptsize (0.5)} & \ion{Fe}{ii} & 13.59{\scriptsize (0.03)} &    &  	&		   &			    & \ion{Zn}{ii} & 11.98{\scriptsize (0.03)} \\
  &          &  	         &                                   & \ion{Zn}{ii} & 10.92{\scriptsize (0.17)} &    &  	&		   &			    & \ion{Cr}{ii} & 12.60{\scriptsize (0.02)} \\
  &	     &  	         &                                   & \ion{Cr}{ii} & 11.77{\scriptsize (0.13)} &    &  	&		   &			    & \ion{Ni}{ii} & 13.01{\scriptsize (0.02)} \\
  &	     &  	         &                                   & \ion{Ni}{ii} & 12.44{\scriptsize (0.17)} &    &  	&		   &			    & \ion{Mn}{ii} & 12.16{\scriptsize (0.03)} \\
  &	     &  	         &                                   & \ion{Mn}{ii} & 11.46{\scriptsize (0.07)} &    &  	&		   &			    & \ion{Si}{ii} & 14.83{\scriptsize (0.03)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.90{\scriptsize (0.06)} &    &  	&		   &			    & \ion{Ti}{ii} & 12.58{\scriptsize (0.06)} \\
  &	     &  	         &                                   & \ion{S}{ii}  & 13.87{\scriptsize (0.16)} &    &  	&		   &			    & \ion{S}{ii}  & 14.66{\scriptsize (0.13)} \\
  &	     &  	         &                                   & \ion{P}{ii}  & $<$$12.32$                 &    &  	&		   &			    & \ion{P}{ii}  & $<$$ 13.03$ \\
  &	     &  	         &                                   & \ion{N}{i}   & 13.22{\scriptsize (0.03)} &    &  	&		   &			    & \ion{N}{i}   & 14.76{\scriptsize (0.22)} \\
6 & 2.065546 & \phantom{0}$-$60  & \phantom{0}6.4{\scriptsize (0.2)} & \ion{Fe}{ii} & 13.58{\scriptsize (0.02)} & 11 & 2.066275 &	     $+$11 & 5.4{\scriptsize (0.1)} & \ion{Fe}{ii} & 13.72{\scriptsize (0.01)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.83{\scriptsize (0.08)} &    &  	&		   &			    & \ion{Cr}{ii} & 12.07{\scriptsize (0.08)} \\
  &	     &  	         &                                   & \ion{S}{ii}  & 13.99{\scriptsize (0.14)} &    &  	&		   &			    & \ion{Ni}{ii} & 12.70{\scriptsize (0.04)} \\
  &	     &  	         &                                   & \ion{N}{i}   & 13.25{\scriptsize (0.13)} &    &  	&		   &			    & \ion{Mn}{ii} & 11.60{\scriptsize (0.06)} \\
7 & 2.065698 & \phantom{0}$-$45  & \phantom{0}4.7{\scriptsize (0.3)} & \ion{Fe}{ii} & 13.18{\scriptsize (0.02)} &    &  	&		   &			    & \ion{Si}{ii} & 13.94{\scriptsize (0.03)} \\
  &	     &  	         &                                   & \ion{Si}{ii} & 13.57{\scriptsize (0.01)} &    &  	&		   &			    & \ion{S}{ii}  & 14.06{\scriptsize (0.21)} \\
  &	     &  	         &                                   & \ion{S}{ii}  & 13.89{\scriptsize (0.25)} &    &  	&		   &			    & \ion{P}{ii}  & $<$$ 12.74$ \\
  &	     &  	         &                                   & \ion{N}{i}   & 13.30{\scriptsize (0.23)} &    &  	&		   &			    & \ion{N}{i}   & 13.50{\scriptsize (0.23)} \\
\hline 
1 & 2.064788 &            $-$134 & \phantom{0}7.6{\scriptsize (3.0)} & \ion{Mg}{i}  & 11.04{\scriptsize (0.12)} &  6 & 2.065903 &	     $-$25\phantom{.0} & 7.0{\scriptsize (0.7)} & \ion{Mg}{i} & 11.36{\scriptsize (0.03)} \\ 
2 & 2.064981 &            $-$115 & \phantom{0}7.9{\scriptsize (2.1)} & \ion{Mg}{i}  & 11.12{\scriptsize (0.09)} &  7 & 2.066064 & \phantom{0}$-$9\phantom{.0}  & 5.2{\scriptsize (0.4)} & \ion{Mg}{i} & 11.72{\scriptsize (0.05)} \\ 
3 & 2.065233 & \phantom{0}$-$91  & \phantom{0}8.8{\scriptsize (0.5)} & \ion{Mg}{i}  & 11.87{\scriptsize (0.03)} &  8 & 2.066155 & \phantom{0}$-$0.6            & 3.1{\scriptsize (1.3)} & \ion{Mg}{i} & 12.11{\scriptsize (0.06)} \\
4 & 2.065461 & \phantom{0}$-$68  &           14.7{\scriptsize (1.7)} & \ion{Mg}{i}  & 11.65{\scriptsize (0.05)} &  9 & 2.066274 &	     $+$11\phantom{.0} & 4.6{\scriptsize (1.0)} & \ion{Mg}{i} & 11.59{\scriptsize (0.06)} \\ 
5 & 2.065692 & \phantom{0}$-$46  & \phantom{0}3.0{\scriptsize (1.0)} & \ion{Mg}{i}  & 11.05{\scriptsize (0.06)} &    &	        & &		 &			     \\
\hline
\multicolumn{6}{l}{\hspace{0.3cm} Intermediate-ion transitions} & & & & & & \\
\hline
1 & 2.064758 &           $-$137 & 3.0{\scriptsize (1.2)} & \ion{Al}{iii} & 11.72{\scriptsize (0.07)} & 6  & 2.065648 &  	  $-$50 &	    10.7{\scriptsize (2.3)} & \ion{Al}{iii} & 11.88{\scriptsize (0.07)} \\
  &          &                  &                        & \ion{Fe}{iii} & $<$$13.64$                 &    &	     &  		&				    & \ion{Fe}{iii} & $<$$ 13.83$ \\
2 & 2.064909 &           $-$122 & 6.6{\scriptsize (1.5)} & \ion{Al}{iii} & 12.00{\scriptsize (0.05)} & 7  & 2.065925 &  	  $-$23 & \phantom{0}8.5{\scriptsize (2.7)} & \ion{Al}{iii} & 12.10{\scriptsize (0.10)} \\
  &          &                  &                        & \ion{Fe}{iii} & $<$$13.92$                 &    &	     &  		&				    & \ion{Fe}{iii} & $<$$ 13.83$ \\
3 & 2.065123 &           $-$101 & 8.5{\scriptsize (2.3)} & \ion{Al}{iii} & 12.01{\scriptsize (0.10)} & 8  & 2.066076 &  \phantom{0}$-$8 & \phantom{0}3.3{\scriptsize (1.0)} & \ion{Al}{iii} & 12.04{\scriptsize (0.19)} \\
  &          &                  &                        & \ion{Fe}{iii} & $<$$13.78$                 &    &	     &  		&				    & \ion{Fe}{iii} & $<$$ 13.59$ \\
4 & 2.065274 & \phantom{0}$-$87 & 6.5{\scriptsize (0.7)} & \ion{Al}{iii} & 12.50{\scriptsize (0.03)} & 9  & 2.066165 & \phantom{$-$00}0 & \phantom{0}5.1{\scriptsize (2.5)} & \ion{Al}{iii} & 12.51{\scriptsize (0.09)} \\
  &          &                  &                        & \ion{Fe}{iii} & $<$$13.59$                 &    &	     &  		&				    & \ion{Fe}{iii} & $<$$ 13.74$ \\
5 & 2.065435 & \phantom{0}$-$71 & 3.0{\scriptsize (1.6)} & \ion{Al}{iii} & 11.97{\scriptsize (0.02)} & 10 & 2.066290 &  	  $+$13 & \phantom{0}4.8{\scriptsize (1.3)} & \ion{Al}{iii} & 11.96{\scriptsize (0.13)} \\
  &          &                  &                        & \ion{Fe}{iii} & $<$$13.77$                 &    &	     &  	        &				   & \ion{Fe}{iii} & $<$$13.59$ \\
\hline
\end{tabular}}
\parbox{16.5cm}{
$^*$ Velocity relative to $z=2.066161$.}
%\end{center}
\par
\end{table}