\begin{table}%t2
\caption{Positions and 1.4~GHz flux densities of the components
of four sources with nontrivial sub-arcsecond structures
as indicated by the FIRST catalogue.}\label{t-FIRST-comps}
%\centerline
{
\begin{tabular}{c c c r r c}
\hline
\hline
Source & RA & Dec &
\multicolumn{2}{c }{$S$~[mJy]} &
\multicolumn{1}{c}{Distance from} \\
{} &
\multicolumn{2}{c}{(J2000)} &
\multicolumn{1}{c}{Peak} &
\multicolumn{1}{c}{Total} &
\multicolumn{1}{c}{the "core'' [\arcsec]} \\
\hline
		& 08 21 06.547  & +21 17 19.26  &    6.92   &    23.25  &   21.0 \\
TXS 0818+214	& 08 21 07.501  & +21 17 03.06  &  142.20   &   148.32  &    --- \\
		& 08 21 08.357  & +21 16 49.09  &    6.12   &    15.98  &   18.4 \\
		&               &               &           &           &       \\
		& 10 36 28.166  & +02 22 28.88  &    4.15   &     4.11  &   71.2 \\
TXS 1033+026	& 10 36 31.933  & +02 21 45.53  &  186.11   &   202.43  &    --- \\
		& 10 36 33.024  & +02 21 36.80  &   21.32   &    27.92  &   18.5 \\
		&               &               &           &           &       \\
		& 13 11 20.744  & +00 53 10.70  &   28.22   &    51.67  &   10.7 \\
TXS 1308+011	& 13 11 21.170  & +00 53 19.23  &  134.20   &   144.57  &    --- \\
		& 13 11 21.786  & +00 53 29.46  &   39.40   &    61.73  &   13.8 \\
		&               &               &           &           &       \\
		& 13 14 57.908  & +56 03 32.46  &   18.54   &    28.08  &   10.4 \\
		& 13 14 57.987  & +56 03 46.06  &    2.39   &    20.69  &    5.4 \\
TXS 1312+563 	& 13 14 58.416  & +56 03 42.00  &  270.24   &   276.44  &    --- \\
		& 13 14 59.232  & +56 03 52.20  &   23.95   &    34.39  &   12.3 \\
\hline
\end{tabular}
}
\end{table}