\begin{table}%t1
\caption{Optical magnitudes and radio flux densities of target sources at two~frequencies.}\label{table1}
%\centerline
{
\begin{tabular}{@{}c c c c l l c l c l r l@{}}
\hline
\hline
       &    &     &   &     &   &
\multicolumn{1}{c}{Total} &
&
\multicolumn{1}{c}{Total} &     &  &  \\
~~~Source & RA & Dec & ID&
\multicolumn{1}{c}{$m_{R}$}&
\multicolumn{1}{c}{\it z}&
\multicolumn{1}{c}{flux at}&
\multicolumn{1}{c}{log~$P_{1.4~{\rm GHz}}$}&
\multicolumn{1}{c}{flux at}&
\multicolumn{1}{c}{$\alpha_{1.4~{\rm GHz}}^{4.85~{\rm GHz}}$}&
\multicolumn{1}{c}{LAS}&
\multicolumn{1}{c}{LLS}\\
~~~name   & h~m~s & $\degr$~$\arcmin$~$\arcsec$ &  & & &1.4~GHz&
&4.85~GHz&&&\\
       &    &     &   &     &   &
\multicolumn{1}{c}{[mJy]}&
\multicolumn{1}{c}{[W~Hz$^{-1}$]} &
\multicolumn{1}{c}{[mJy]}& &
\multicolumn{1}{c}{[mas]}&
[$h^{-1}~{\rm pc}]~~~$ \\
~~~(1)& (2)& (3) &(4)&
\multicolumn{1}{c}{(5)}&
\multicolumn{1}{c}{(6)}&
\multicolumn{1}{c}{(7)}&
\multicolumn{1}{c}{(8)}&
\multicolumn{1}{c}{(9)}&
\multicolumn{1}{c}{(10)}&
\multicolumn{1}{c}{(11)}&
\multicolumn{1}{c}{(12)}\\
\hline
~~~0809+404 &08 12 53.131 &40 19 00.09&Q&19.50&~0.551&1068&~~~26.63& 392&
$-$0.81&14.87&~~~~54.9\\
~~~0949+287 &09 52 06.090 &28 28 32.35&G&20.15&~~~~-- &1364&~~~27.38$\ast$& 529&
$-$0.76&308.79&1330.0$\ast$\\
~~~1159+395 &12 01 49.982 &39 19 11.26&G&23.32&~2.370&~~599&~~~27.78& 249&
$-$0.71&41.08&~~161.3\\
~~~1315+396 &13 17 18.653 &39 25 28.02&Q&18.20&~1.560&~~615&~~~27.39& 227&
$-$0.80&33.77&~~143.8\\
~~~1502+291 &15 04 26.715 &28 54 30.55&q&18.58&~0.056?&~~567&~~~24.29?& 261&
$-$0.63&41.60&~~~~30.8?\\
~~~1616+366 &16 18 23.546 &36 32 01.33&G&19.35&~0.734&~~536&~~~26.60&268&
$-$0.56&$\sim$60.00&~~242.0\\
\hline
\end{tabular}}
\medskip
Column~(1): source name in the IAU format;
Col.~(2): source right ascension (J2000) extracted from FIRST;
Col.~(3): source declination (J2000) extracted from FIRST;
Col.~(4): optical identification: G~-- galaxy, Q~-- quasar, q~--
star-like object without known redshift;
Col.~(5): red magnitude extracted from SDSS/DR4;
Col.~(6): redshift;
Col.~(7): total flux density at 1.4~GHz extracted from FIRST;
Col.~(8): Log of radio luminosity at 1.4~GHz in~W~Hz$^{-1}$;
Col.~(9): total flux density at 4.85~GHz extracted from~GB6;
Col.~(10): spectral index between~1.4 and 4.85~GHz calculated using flux densities in Cols.~(7) and~(9);
Col.~(11): largest Angular Size (LAS) in milliarcseconds measured
in the 1.65-GHz VLBA image~-- in most cases, as a~separation between the
outermost component peaks; in one case (denoted with~"$\sim$'') measured in the
image contour plot;
Col.~(12): largest Linear Size (LLS) in~$h^{-1}$~pc. Values denoted with~"$\ast$'' were computed assuming median redshift $z=1.085$.
Redshift quoted for 1502+291 is the redshift of Abell~2022~cluster.
\end{table}