\begin{table}%t1
%%\centering
\par
\caption{\textit{Chandra} observations of the CrA star-forming region used
in this study. 
\label{table_obs} }      % Give a unique label
%
\begin{tabular}{rccc}
\hline\hline\noalign{\smallskip}
Obs & Expo. & Aimpoint & Start date \\
 & [ks] &  [J2000] & \\
\noalign{\smallskip}\hline\noalign{\smallskip}
 19   & 19.96 & 19 01 50.6 ~ $-36$ 57 30 &  2000-10-07 ~ 17:00:55\\
3499  & 38.13 & 19 01 50.6 ~ $-36$ 57 30 &  2003-06-26 ~ 12:57:06\\
4475  & 20.17 & 19 01 48.9 ~ $-36$ 59 23 &  2004-06-17 ~ 23:15:56\\
5402  & 15.39 & 19 01 45.0 ~ $-36$ 58 09 &  2005-08-08 ~ 02:36:49\\
5403  & 15.15 & 19 01 45.0 ~ $-36$ 58 09 &  2005-08-09 ~ 02:37:49\\
5404  & 15.17 & 19 01 45.0 ~ $-36$ 58 09 &  2005-08-10 ~ 01:57:21\\
5405  & 15.17 & 19 01 45.0 ~ $-36$ 58 09 &  2005-08-12 ~ 03:11:53\\
5406  & 14.76 & 19 01 45.0 ~ $-36$ 58 09 &  2005-08-13 ~ 01:50:17\\
\hline
\end{tabular}
\end{table}