\begin{table}%t1
 \caption{Dynamic ranges for the VLA images.}\label{t:obs.vla.dynran}
%%\centerline
\par
{
\begin{tabular}{lcccc}
\hline\hline 
VLA &  $\lambda$ &  Peak flux &  rms noise &  Dynamic\\
 band & \cm & \mJy & \mJy &  range\\
\hline
 $X$ & 3.6 & 33.0 & $4.5\times 10^{-4}$ & 75~000\\
 $U$ & 2.0 & 28.3 & $2.6\times 10^{-4}$ & 110~000\\
 $K$ & 1.3 & 23.4 & $4.0\times 10^{-4}$ & 59~000\\
 $Q^a$ & 0.7 & 20.9 & $2.5\times 10^{-3}$ & 9000\\
\hline
\end{tabular}}
\medskip
$^a$ Image not used for spectra.
\end{table}