\begin{table}%t1
\caption{Details of the XMM-Newton and Chandra observations of RX~J0822-4300. \label{obs_info}}
\small%\centering
\par
\begin{tabular}{llllclcl}
\hline\hline
Telescope & Instrument & Instrument mode & Filter & Obs.ID    & Start date  & Effective   & Net rate\\
          &            &                 &        &           &             & exposure   & (cts $\mbox{s}^{-1}$)\\
\hline
Chandra    & HRC-I    & Default          & UVIS   & 749        & 1999-12-21 & 16 ks & 0.21~$\pm$~0.01\\ 
Chandra    & ACIS-S 2 & Timed Exposure   & OBF    & 750        & 2000-01-01 & 11 ks & 0.71~$\pm$~0.01\\ 
Chandra    & HRC-S    & Imaging          & UVIS   & 1851       & 2001-01-25 & 19 ks & 0.32~$\pm$~0.01\\  
XMM-Newton & MOS1     & PrimeFullWindow  & Medium & 0113020101 & 2001-04-15 & 7.3 ks & 0.50~$\pm$~0.01\\  
XMM-Newton & MOS2     & PrimeFullWindow  & Medium & 0113020101 & 2001-04-15 & 7.5 ks & 0.52~$\pm$~0.01\\  
XMM-Newton & PN       & PrimeSmallWindow & Thin   & 0113020101 & 2001-04-15 & 16  ks & 1.62~$\pm$~0.01\\ 
XMM-Newton & MOS1     & PrimeFullWindow  & Thick  & 0113020301 & 2001-11-08 & 7.5 ks & 0.45~$\pm$~0.01\\ 
XMM-Newton & MOS2     & PrimeFullWindow  & Thick  & 0113020301 & 2001-11-08 & 6.2 ks & 0.46~$\pm$~0.01\\  
XMM-Newton & PN       & PrimeSmallWindow & Thin   & 0113020301 & 2001-11-08 & 16  ks & 1.63~$\pm$~0.01\\
\hline
\end{tabular}
\end{table}