\begin{table}%t2
%\centering
\par
\caption{Observing parameters for the ATCA radio imaging survey. All observing dates were
 in 2002.\label{tbl:obspar}}
\begin{tabular}{llll}
\hline\hline
Observing dates & 9th Jan. & 16th Jan. & 29th Jun. \\ \hline
Configuration & 750A & 750A & EW214 \\
Wavelength & 20/13 cm & 20/13 cm & 6/3 cm \\
Bandwidth & 128 MHz & 128 MHz & 128 MHz \\
Time per source & 30 min & 30 min & 30 min \\
Phase calibrators & 1109$-$56 & 0647$-$75& 0906$-$47\\
 & 1352$-$63 & 0733$-$174& 1109$-$56\\
 & 1613$-$586 & 0826$-$373& 1622$-$297\\
 & 1646$-$50 & 0906$-$47& 1646$-$50\\
 & 1748$-$253 & & \\ \hline
\end{tabular}
\end{table}