\begin{table}%t1
\caption{\xmm\ \epic\ observation log. The abbreviations used are: EF -- Extended 
Full Frame , FF -- Full Frame , LW -- Large Window, T -- Thin Filter, M -- Medium Filter.}
\label{tab:tab1}
%\centerline
{
\begin{tabular}{lcccccccc} \hline\hline
Rev No.  & Obs. ID      &  \multicolumn{2}{c}{Mode}& Filt. & 
\multicolumn{2}{c}{Exp. (ks)} & RA & Dec \\ 
         &              &   pn      &   MOS       &          &   pn     & MOS  
&(J2000)    & (J2000) \\ \hline
156     & 0110000101   & EF & FF      & M   & 23& 27  &00 49 07&
$-$73 14 06   \\
157     & 0110000201   & EF & FF      & M   & 16 & 20 &00 59 26&
$-$72 10 11         \\
157     & 0110000301   & EF & FF      & M   & 31 & 35 &01 04 52&
$-$72 23 10         \\
247     & 0135720601   & FF & LW      & T   & 16 & 33 &01 03 50&
$-$72 01 55      \\
433     & 0135720901   & FF & LW      & T   & 14 & 13 &01 04 01&
$-$72 01 51         \\ \hline
\end{tabular}
}
\end{table}