\begin{table}%t1
%\centering
\par
\caption{Source parameters of NGC~4594 and VLA observation \mbox{details}.\label{table1}}
\begin{tabular}{llll}
\hline\hline
\noalign{\smallskip}
Field centre \\
   B1950            &\multicolumn{3}{l}{$\rm \alpha_{50} = 12^h 37^m 23\fs 4$} \\
                    &\multicolumn{3}{l}{$\delta_{50} = -11\degr 20\arcmin 55\arcsec$} \\
   J2000            &\multicolumn{3}{l}{$\rm \alpha_{2000} = 12^h 39^m 59\fs 4$} \\
                    &\multicolumn{3}{l}{$\delta_{2000} = -11\degr 37\arcmin 23\arcsec$} \\
Observing period    &\multicolumn{3}{l}{April  3, 1995\quad 8 h} \\
                    &\multicolumn{3}{l}{April 30, 1995\quad 8 h} \\
\noalign{\medskip}
Frequency           & 4.8351 GHz      & 4.8851 GHz \\
Bandwidth           &\multicolumn{3}{c}{$2\times 50$ MHz} \\
Shortest spacing    &\multicolumn{3}{c}{73 m} \\
Longest spacing     &\multicolumn{3}{c}{3.4 km} \\
Synthesized beam    &23\arcsec   &30\arcsec   &84\arcsec \\
rms~noise (I) [$\mu$Jy/b.a.]   & 10  &  10  &  25 \\
rms~noise (PI) [$\mu$Jy/b.a.]  &  7  &  7   &  17 \\
\noalign{\smallskip}
\hline
\end{tabular}
\end{table}