\begin{table}%t1
%\centering
\par
\caption{\label{table-VLA-obs}VLA archival observations used in this paper.}
\begin{tabular}{cccc}
\hline
\hline
Date  &  Project & \# of visibilities & Time on source \\
\hline 
2003 Jul. 31 & AR523 & 249953  & 2807 s \\
2004 Oct. 16 & AR545 & 200182  & 1280 s \\
2006 Jan. 30 & AR570 & 151035  & 2153 s \\
\hline
  \end{tabular}
 \end{table}