\begin{table}%t1
   \caption{\label{tab: observations}XMM observation summary for EXO 0748--676.}
   %\centering
\par
   \begin{tabular}{l c c c c c c c c}
   \hline \hline
   Orbit & Obs. ID & Instruments & Obs. date & \multicolumn{3}{c}{observing time (ks)} & Group  & Spectrum\\
         &         &           & (yymmdd)  & total & per & dip                       &        & mos/pn  \\
   \hline
   0055 & 0122310301 & mos/rgs    & 00-03-28    & 61.0  & 11.9 &  0.9 & A   &  -- \\
   0067 & 0123500101 & mos/pn/rgs & 00-04-21    & 62.1  & 16.9 & 14.5 & A   & yes \\
   0212 & 0134561101 & mos/pn/rgs & 01-02-03    & 8.4   &  0.0 &  3.8 & A   &  --  \\
   0212 & 0134561201 & mos/pn/rgs & 01-02-04    & 6.6   &  0.3 &  1.7 & A   &  --  \\
   0212 & 0134561301 & mos/pn/rgs & 01-02-04    & 6.9   &  1.6 &  1.3 & A   &  --  \\
   0212 & 0134561401 & mos/pn/rgs & 01-02-04    & 6.6   &  1.5 &  1.4 & A   &  --  \\
   0212 & 0134561501 & mos/pn/rgs & 01-02-04    & 6.6   &  1.2 &  1.3 & A   &  --  \\
   0338 & 0134562101 & mos/rgs    & 01-10-13    & 8.7   &  4.7 &  2.1 & B   &  --  \\
   0338 & 0134562201 & mos/rgs    & 01-10-13    & 6.9   &  4.8 &  1.3 & B   &  --  \\
   0338 & 0134562301 & mos/rgs    & 01-10-13    & 6.9   &  6.2 &  0.0 & B   &  --  \\
   0338 & 0134562401 & mos/rgs    & 01-10-13    & 6.9   &  2.8 &  2.3 & B   &  --  \\
   0338 & 0134562501 & mos/rgs    & 01-10-13/14 & 6.9   &  2.5 &  2.4 & B   & yes \\
   0693 & 0160760201 & mos/pn/rgs & 03-09-21/22 & 93.4  & 41.5 & 23.1 & C2 &  --  \\
   0694 & 0160760301 & mos/pn/rgs & 03-09-23/24 & 108.3 & 47.8 & 29.6 & C3 & yes \\
   0695 & 0160760401 & mos/pn/rgs & 03-09-25/26 & 82.0  & 29.4 & 26.6 & C3 &  --  \\
   0710 & 0160760801 & mos/pn/rgs & 03-10-25/26 & 67.9  & 21.8 & 18.1 & C1 & yes \\
   0719 & 0160761301 & mos/pn/rgs & 03-11-12/13 & 94.7  & 31.3 & 35.3 & C2 & yes \\
   \hline
   \end{tabular}
\end{table}