\begin{table}%t1
\par
         \caption{GPS sources. Columns 1 through 13 provide source name, optical identification (G: galaxy,
Q: quasar, EF: empty field), optical magnitude ("$V$'',"$R$'' are the
bands in the optical, "$r$'' band-defined by Stanghellini et~al.
1993), redshift (those with * are a photometric estimate by
Heckman et~al. 1994), linear scale factor pc/mas [$H_{0}=100~ h~
\rm km~s^{-1}~ Mpc^{-1}$ and $q_{0}=0.5$ have been assumed],
maximum VLBI angular size from\protect Papers~I, II or this observation,
maximum VLBI linear size, 5~GHz total flux density measured at
Effelsberg, low frequency spectral index, high frequency spectral
index, turnover frequency, peak flux density and references for
the spectral information (Refs. 1, de Vries et~al. 1997; 2,
Stanghellini et~al. 1998; 3, Dallacasa et~al. 2000; 4, O'Dea et
al. 1996; 5, Spoelstra et~al. 1985).}
\par
%\begin{center}
\par
           \begin{tabular}{ccccccccccccc}
\par
            \hline
            \hline
\par
            \noalign{\smallskip}
\par
            1&2 &3 &4 & 5& 6 & 7 & 8&9 &10 & 11 & 12 & 13\\
\par
Source & id & mag & $z$ & pc/mas & $\theta$ & $L$ & $S_{\rm{Ef}}$  &
$\alpha_{\rm l}$ & $\alpha_{\rm h}$ & $\nu_{\rm m}$ & $S_{\rm m}$ & Refs. \\
\par
& & & & & [mas] & [pc] & [Jy]& & & [GHz] & [Jy] & \\
\par
            \noalign{\smallskip}
\par
            \hline
\par
            \noalign{\smallskip}
\par
\object{0554$-$026} & G   & 18.5$V$  & 0.235 & $2.37~h^{-1}$ & 30  & $71~h^{-1}$ &     & --1.07 & 0.63  & 1.0 & 0.8 & 1 \\
\par
\object{0914+114} & G   & 20.0$r$  & 0.178 & $1.95~h^{-1}$ & 150 & $293~h^{-1}$&0.11 & --0.1  & 1.6   & 0.3 & 2.3 & 2 \\
\par
\object{1133+432} & EF  &        &       &             & 40  &            &0.45  & --0.60 & 0.6   & 1.0 & 1.4 & 1 \\
\par
\object{1333+589} & EF  &        &       &             & 20  &            &0.67 & --0.84 & 0.52 & 4.9 & 0.73& 3 \\
\par
\object{1433$-$040} & G  & 22.3$r$  &       &             & 20  &            &      &     &     &    &   & 4, 5\\
\par
\object{1509+054} & G   & 16.2$V$  &  0.084 & $1.06~h^{-1}$  & 17  & $18~h^{-1}$ &    & --1.72 & 0.46  & 11 & 0.77& 3 \\
\par
\object{1518+046} & Q   & 22.2$R$  & 1.296 & $4.3~h^{-1}$ & 160 &$688~h^{-1}$ &1.06  & --0.6  & 1.3  & 0.9 &4.58 &2  \\
\par
\object{1751+278} & G   & 21.7$R$  & 0.86* & $4.2~h^{-1}$ & 50  &$210~h^{-1}$ &      & --0.27 & 0.57  & 1.4 &0.6 &1  \\
\par
\object{1824+271} & G?  & 22.9$R$  &       &             & 45  &            &      & --0.39 & 0.75  & 1.0 & 0.4 & 1 \\
\par
\object{2121$-$014} & G   & 23.3$R$  & 1.158 & $4.3~h^{-1}$ & 88  &$378~h^{-1}$ &      & --0.56 & 0.75  & 0.5 & 1.8 & 1 \\
\par
\object{2322$-$040} & G  & 23.5$R$  &       &             & 65  &            &     & --0.42 & 0.75  & 1.4 & 1.3 & 1 \\
\par
\object{2323+790} & G   & 19.5$V$  &       &             & 32  &            &0.43  & --0.3  &0.75   &1.4  &1.2 & 1 \\
\par
\object{DA193}    & Q   & 18.0$V$  & 2.365 & $4.0~h^{-1}$  & 4   & $16~h^{-1}$ &      & --1.6  & 0.6  & 9.5 & 7.8  & 2  \\
\par
\object{OQ208}    & G   & 14.6$r$  & 0.077 & $1.0~h^{-1}$ & 10  & $10~h^{-1}$ &      & --1.5  & 1.6  & 4.9 &2.76  & 2 \\
\par
\noalign{\smallskip}
\par
            \hline
\par
          \end{tabular}
\par
          %\end{center}
\par
          \label{table:gps}
\par
   \end{table}