\begin{table}%t1
  \caption{\label{pks}Basic data for PKS~1830$-$211 and the intervening galaxy.} 
\small%\centerline
{
 \begin{tabular}{llll}
\hline \hline
\multicolumn{4}{l}{PKS~1830$-$211} \\
NE~image          & RA (J2000) & 18$^{\rm h}$33$^{\rm m}$39\fs 932  & (1) \\
                  & Dec (J2000) & $-$21\degr 03\arcmin 39 \farcs 73       & (1) \\
SW~image          & RA (J2000) & 18$^{\rm h}$33$^{\rm m}$39\fs 886  & (1) \\
                  & Dec (J2000) & $-$21\degr 03\arcmin 40\farcs 45       & (1) \\
Redshift          &             & $z = 2.5$                 & (2) \\
3~mm flux density  & (variable)  & 1.5--2.5 Jy            &     \\
Flux distribution & NE~image    & $\sim$63\%             & (3) \\
                  & SW~image    & $\sim$37\%             & (3) \\
\hline
\multicolumn{4}{l}{Intervening galaxy} \\
Redshift          &               & $z = 0.88582$           & (3) \\
Type              &               & Sb or Sc              & (4) \\
Inclination       &               & 17\degr --32\degr     & (5) \\
Linear scale      &               & $1\arcsec\sim 7.8$ kpc    & \\
Velocity (heliocentric)          & SW~absorption & $\sim$0~km~s$^{-1}$         & (6) \\
                  & NE~absorption & $\sim$$-$147~km~s$^{-1}$      & (6) \\
Age               &               & $\leq$6 Gyr          & \\
\hline
\end{tabular}}
\smallskip
References: (1) Subrahmanyan et~al. (\cite{sub90}); (2) Lidman et~al. (\cite{lid99});
(3)~\cite{wc96}; (4) Winn et~al. (\cite{win02}); (5)~Koopmans \& de Bruyn (\cite{koo05}); (6)~\cite{wc98}.
\end{table}