\begin{table}%t1
\caption{VLA archive observations used in this paper.}\label{obslog}
%\centering
\small
\begin{tabular}{cccccccc}
\hline
\hline
Date  &  wavelength  & VLA  & Number of  & Bandwidth  & Number of    &  Project & Time on    \\
      &  (cm)   & configuration. &  IFs  &  (MHz)      &  visibilities &  id. & source (h) \\ 
\hline 
1992 Jun. 8 &   6 &  DnC & 2 & 50 & 432~229  & UT002 &  5   \\
1997 May 4 &   6 &  B & 2  & 50 & 718~939 & AM551   &  5.7   \\ 
2000 Aug. 29 &  6 &  D & 2 & 50 & 29~167 & AH669     &  0.33    \\
\hline
\end{tabular}
\end{table}