\begin{table}%T2
\caption{Log of VLA observations.\label{log_vla}}
%\centering
\par
\begin{tabular}{cccccccc}
\hline\hline
 & Absolute &   & \multicolumn{2}{c}{8.4~GHz} & \multicolumn{3}{c}{22~GHz} \\
 & flux density &   & minutes & phase and amp. & minutes & amplitude & phase \\
Date & calibrator & Target & on source & calibrator & on source & calibrator &  calibrator \\
\hline
28/6 & 3C~147 & 0648+27 & 11 & 0645+213 & 18 & 0741+312 & 0657+243 \\
     & 3C~48  & 0222+36 & 11 & 0237+288 & 18 & 0237+288 & 0230+405 \\
     &         & 0258+35 & 11 & 0237+288 & 18 & 0237+288 & 0310+382 \\
29/6 & 3C~286 & 1037+30 & 9.5 & 0956+252 & 12 & 0956+252 & 1037+285 \\
 3/7 & 3C~286 & 1855+37 & 10.5 & 1800+388 & 18 & 1800+388 & 1912+376 \\
\hline
\end{tabular}
\end{table}