\begin{table}%t1
\caption{The \xmm\ observations details.}\label{tab:xmmobs}
%\centerline
 {\small \begin{tabular}{lclcllrc}
\hline\hline
\multicolumn{1}{c}{Object} & 
\multicolumn{1}{c}{Observing date} &
\multicolumn{1}{c}{Instrument} &
\multicolumn{1}{c}{ObsId} &
\multicolumn{1}{c}{Mode} & 
\multicolumn{1}{c}{Filter } &
\multicolumn{1}{c}{Exposure} & 
\multicolumn{1}{c}{Count rate } \\
\multicolumn{1}{c}{ } & 
\multicolumn{1}{c}{ UT } &
\multicolumn{1}{c}{ } &
\multicolumn{1}{c}{ } &
\multicolumn{1}{c}{ } & 
\multicolumn{1}{c}{ } &
\multicolumn{1}{c}{(ks)} & 
\multicolumn{1}{c}{cts/s$^{(\ddagger)}$ } \\
  \hline  
NGC 4235 & Jun. 09, 2004  & PN   & 0204650201 & Large Window  & Thin &  9.6 & 0.96 \\
&  09:04$-$12:43 & MOS1 &     & Prime Partial & Thin & 10.9 & 0.31 \\
&   & MOS2 &     & Prime Partial & Thin & 10.9 & 0.31 \\
%\noalign{\smallskip}\hline  \noalign{\smallskip} 
NGC 4639 & Dec. 12, 2001 & PN   & 0112551001 & Extd. Full Frame & Medium &  8.8 & 0.28 \\
& 16:19--18:19 & MOS1 &            & Full Window      & Thin   & 14.2 & 0.09 \\
&               & MOS2 &            & Full Window      & Thin   & 14.2 & 0.09 \\
%\noalign{\smallskip}\hline  \noalign{\smallskip}  
NGC 5033 & Dec. 18, 2002 & PN   & 0094360501 & Full Frame  & Medium &  9.1 & 2.40 \\
& 15:05--19:01 & MOS1 &            & Full Window & Medium & 11.5 & 0.68 \\
&               & MOS2 &            & Full Window & Medium & 11.5 & 0.68 \\
%\noalign{\smallskip}\hline  \noalign{\smallskip}
NGC 5273 & Jun. 14, 2002 & PN   & 0112551701 & Extd. Full Frame & Medium &  9.3 & 1.57 \\
& 13:15--16:37 & MOS1 &            & Full Window      & Thin   & 14.2 & 0.57 \\
&               & MOS2 &            & Full Window      & Thin   & 14.2 & 0.56 \\ 
 \hline
\end{tabular}}
\medskip
$^{\ddagger}$ Background subtracted values.
\end{table}