\begin{table}%T1
\caption{\xmm\ log of archival \object{M~31}\ observation overlapping with the optical 
$D_{25}$ ellipse (proposal numbers 010927, 011257 and 015158).}
\label{observations}
%\centerline
 {
\begin{tabular}{lllrrrlrlrlr}
\hline
\hline\noalign{\smallskip}
\multicolumn{1}{c}{M 31 field} & \multicolumn{1}{c}{Obs. id.} &\multicolumn{1}{c}{Obs. dates} &
\multicolumn{2}{c}{Pointing direction} & \multicolumn{1}{c}{Offset$^*$} & \multicolumn{2}{c}{EPIC PN} & 
\multicolumn{2}{c}{EPIC MOS1} & \multicolumn{2}{c}{EPIC MOS2}  \\ 
\noalign{\smallskip}
& & & \multicolumn{2}{c}{RA/Dec (J2000)} & \multicolumn{1}{c}{} 
& \multicolumn{1}{c}{Filter$^{+}$}  & \multicolumn{1}{c}{$T_{\exp}^{\dagger}$}
& \multicolumn{1}{c}{Filter$^{+}$}  & \multicolumn{1}{c}{$T_{\exp}^{\dagger}$}
& \multicolumn{1}{c}{Filter$^{+}$}  & \multicolumn{1}{c}{$T_{\exp}^{\dagger}$}\\
\noalign{\smallskip}
\multicolumn{1}{c}{(1)} & \multicolumn{1}{c}{(2)} & \multicolumn{1}{c}{(3)} & 
\multicolumn{1}{c}{(4)} & \multicolumn{1}{c}{(5)} & \multicolumn{1}{c}{(6)} & 
\multicolumn{1}{c}{(7)} & \multicolumn{1}{c}{(8)} & \multicolumn{1}{c}{(9)} & 
\multicolumn{1}{c}{(10)} & \multicolumn{1}{c}{(11)} & \multicolumn{1}{c}{(12)}\\
\noalign{\smallskip}\hline\noalign{\smallskip}
Centre 1~(c1) & 0112570401 & 2000--06--25    & 0:42:36.2 & 41:16:58 & $-1.9,+0.1$ & medium  & 26.40 (23.60) & medium  & 29.92 (29.64) &medium  & 29.91 (29.64) \\
Centre 2~(c2) & 0112570601 & 2000--12--28    & 0:42:49.8 & 41:14:37 & $-2.1,+0.2$ & medium  &  9.81 (5.85) & medium  & 12.24 (6.42) &medium  & 12.24 (6.42) \\
Centre 3~(c3) & 0112570701 & 2001--06--29    & 0:42:36.3 & 41:16:54 & $-3.2,-1.7$ & medium  & 27.65 (21.83) & medium  & 27.65 (23.85) &medium  & 27.65 (23.86) \\
North 1~~~(n1) & 0109270701 & 2002--01--05    & 0:44:08.2 & 41:34:56 & $-0.3,+0.7$ & medium  & 54.78 (48.57) & medium  & 57.31 (55.68) &medium  & 57.30 (55.67) \\
Centre 4~(c4) & 0112570101 & 2002--01--06/07 & 0:42:50.4 & 41:14:46 & $-1.0,-0.8$ & thin	& 60.79 (48.11) & thin	 & 63.31 (52.87) &thin	 & 63.32(52.86) \\
South 1~~~(s1) & 0112570201 & 2002--01--12/13 & 0:41:32.7 & 40:54:38 & $-2.1,-1.7$ & thin	& 53.45 (47.00) & thin	 & 53.76 (51.83) &thin	 & 53.73(51.84) \\
South 2~~~(s2) & 0112570301 & 2002--01--24/25 & 0:40:05.0 & 40:34:38 & $-1.1,-0.3$ & thin	& 29.31 (22.23) & thin	 & 29.37 (24.23) &thin	 & 29.38(24.24) \\
North 2~~~(n2) & 0109270301 & 2002--01--26/27 & 0:45:28.6 & 41:55:26 & $-0.3,-1.5$ & medium  & 26.27 (22.86) & medium  & 26.54 (25.22) &medium  & 26.55 (25.28) \\
North 3~~~(n3) & 0109270401 & 2002--06--29/30 & 0:46:31.1 & 42:17:32 & $-2.3,-1.7$ & medium  & 51.39 (41.28) & medium  & 59.69 (45.39) &medium  & 59.69 (45.53) \\
Halo 4~~~~(h4) & 0151580401 & 2002--02--06    & 0:46:15.9 & 41:20:25 & $+0.3,+0.0$ & medium  & 11.29 (11.29) & medium  & 12.91 (12.91) &medium  & 12.92 (12.92) \\
\noalign{\smallskip}
\hline
\end{tabular}
}\smallskip
Notes:\\
$^*$: Systematic offset in Ra and Dec in arcsec determined from correlations with 2MASS, USNO-B1 and \chandra\ catalogues. \\
$^{ +}$: All observations in full frame imaging mode.\\
$^{ {\dagger}}$: Exposure time in units of ks after screening for high
background used for detection, for colour image in brackets (see text).
\end{table}