\begin{table}%t2
\caption{\label{tab: observations}Overview of the observations.}
%\centerline
 {\small \begin{tabular}{lccccl}
\hline \hline
Obs. date & Wavelengths & Configuration & Flux calibrator& Integration$^{a}$ & Notes\\
& (mm)   &  & & (hours) & (weather, array \& data)\\
 \hline
 \multicolumn{6}{c}{\object{WW~Cha}, ATCA 7 mm band} \\
 %\hline
 5 October 2007 & 7.0, 7.3 & H75C & \object{1057-797} & 1.35 & CA02 offline \\
 31 March 2008 & 7.0, 7.3 & H168 & \object{1057-797} & 1.99	 &\\
 \hline	
 \multicolumn{6}{c}{\object{WW~Cha}, ATCA 12~mm band}\\
 %\hline
8 May 2006$^{b}$ & 16.1, 16.2  & H214C & \object{Mars} & 0.80 &excellent conditions; CA03$+$CA04 offline \\
13 October 2006 & 16.1, 16.2 & H214C & \object{1934-638} & 1.31 & very good conditions; noisy 16.1~mm data \\
18 October 2006 & 16.1, 16.2& EW352& \object{1934-638}& 3.32& noisy 16.1~mm data\\
24 October 2007  & 15.4, 16.2& H214C&\object{1934-638} & 3.15 & conditions deteriorated over scan \\
2 November 2007 & 15.4, 16.2 & 1.5A & \object{1934-638} & 8.48 &\\
 31 March 2008 & 15.4, 16.2 & H168 & \object{1057-797} & 1.33&\\
\hline
 \multicolumn{6}{c}{\object{WW~Cha}, ATCA 3 + 6~cm bands}\\
% \hline
 18 October 2006 & 34.7, 62.5 & EW352 & \object{1934-638} & 3.95& a lot of data flagged \\
 9 June 2007 & 34.7, 62.5 & EW352 & \object{1934-638} & 5.19&\\
\hline%\hline
\multicolumn{6}{c}{\object{RU~Lup}, ATCA 7~mm band}\\
 %\hline
 6 October 2007 & 7.0, 7.3 & H75C & \object{Uranus} & 0.99 & CA04 offline \\
 \hline
 \multicolumn{6}{c}{\object{RU~Lup}, ATCA 12~mm band}\\
% \hline
 11 October 2006 & 16.1, 16.2 & H214C& \object{1934-638}& 3.66& very good conditions\\
24 October 2007 & 16.1, 16.2 & H214C & \object{1934-638} & 2.49 & fair conditions\\
 4 November 2007 & 15.4, 16.2 & 1.5A & \object{1934-638} & 3.79 & fair conditions\\
 \hline
 \multicolumn{6}{c}{\object{RU~Lup}, ATCA 3+6 cm bands}\\
% \hline
 12 October 2006 & 34.7, 62.5 & H214C & \object{1934-638} & 3.53 & very good conditions\\
13 October 2006 & 34.7, 62.5 & H214C & \object{1934-638} & 1.70 &very good conditions\\
 9 June 2007 & 34.7, 62.5 & EW352 & \object{1934-638} & 3.32& good conditions	 \\
 4 November 2007  & 34.7, 62.5 & 1.5A & \object{1934-638} & 3.48 & a lot of data flagged\\
 \hline%\hline
 \multicolumn{6}{c}{\object{CS~Cha}, ATCA 7~mm band}\\
 %\hline
 26 April 2008  & 7.0, 7.3 & 6A  & \object{1921-293} & 6.89 &fair conditions\\
 30 June 2008 & 6.7, 7.0 & 1.5B & \object{Mars} & 4.85 &poor conditions\\
 5 July 2008 & 6.7, 7.0 & 1.5B & \object{Uranus} & 0.72 &very good conditions\\
 6 July 2008 & 6.7, 7.0 & 1.5B & \object{Uranus} & 1.71 &fair conditions\\
 \hline
 \end{tabular}}
\medskip
$^{a}$  Total time spent on the science target, before flagging and calibration of data; $^ {b}$~three antennas only.
\end{table}