\begin{table}%T1
%\centering
\par
\caption{Instrumental configurations used.}
\label{tab01}
\begin{tabular}{cllllcccc}
\hline\hline
Nr.&Observatory&Epoch(s)& Telescope& Spectrograph& Recip. disp. & $\Delta\lambda$& exp. time& $S/N$\\
&       &          &  &             & (\AA~mm$^{-1}$) & (\AA)&  (min)& \\
\hline
I& CTIO  &1982 Feb. -- 1985 March & 1-m   & CITS   & 45 & 3700--4900 &   20 &  30--60\\
II& CASLEO & (1997 -- 1998) Feb. & 2.1-m & REOSC &  7 & 3700--6000 & 30 & 20--50 \\
III & CASLEO &1997 March -- 1999 May & 2.1-m &B\&C & 115 &   3800--5000 & 20&  120--200 \\
\hline
\end{tabular}
\end{table}