\begin{table}%t3
\caption{\label{conttab}Observing parameters for the interferometric continuum maps of NGC~3256 and NGC~3620.} 
%\centerline
 {
\begin{tabular}{l l c c c c c c  c}
\hline
\hline
Source&Band    &$\nu$   &Observation &Telescope &Weighting &Restoring Beam &Position         & rms \\ 
     &  &(GHz) &date        &          &          & {\it FWHM} ($''$)   &Angle ($^{\circ}$)        & (mJy/beam)\\
\hline
NGC~3256 &$K$       & 19.5 & 12-Apr.-2008& ATCA     & Natural  & $1.19 \times 0.59$& 4.0     &  0.1\\
          &        &      & 13-Apr.-2008&          &          &                   &         & \\
          &$K^{a}$ & 22.1 & 12-Apr.-2008& ATCA     & Natural  & $1.16 \times 0.53$& 6.9     &  0.2 \\
          &        &      & 13-Apr.-2008&          &          &                   &         &   \\
          &        &      &            &          &          &                   &         &\\
NGC~3620 &$C$       & 4.8  & 14-Apr.-2006& ATCA     & Natural  & $2.98 \times 2.51$& --4.6    &  0.4 \\
          &$X$       & 8.6  & 14-Apr.-2006& ATCA     & Natural  & $1.92 \times 1.50$& --6.2    &  0.2 \\
          &$K$       & 19.5 & 15-Apr.-2006& ATCA     & Natural  & $0.91 \times 0.61$& 12.1    &  0.2\\
          &        &      & 16-Apr.-2006&          &          &                   &         &  \\
          &$K^{a}$ & 22.1 & 15-Apr.-2006& ATCA     & Natural  & $0.85 \times 0.56$& 7.8     &  0.2 \\
          &        &      & 16-Apr.-2006&          &          &                   &         &   \\
\hline
\end{tabular}}
\par
\medskip
$^{a}$ Obtained by the line-free channels of our $K$-band data at 22~GHz.
\end{table}