\begin{table}%t1
\caption{\label{Log}Log of objects observed in the direction of M~31 and derived spectral types.}
\par
\small%\centerline
 {
\begin{tabular}{llllllllllll}
\hline\hline
\multicolumn{12}{c}{{M~31}}\\
 {ID}$^1$  &  {RA}   & {Dec} &
\multicolumn{3}{c} {USNO-B1}  & \multicolumn{3}{c}{2MASS} & {date} & {Exp.} & {spectral} \\
&(2000)&(2000)&{ID}&{$B$}&{$R$}&{ID}&{$J$ }&$K$&&{(s)}&{type}\\
\hline
 40      &   00 40 07.29 &   40 41 41.2  & 1306-0011378  &   16.1   &   14.3    &    00400722+4041428   &   13.55  & 13.16 & 29/09/07  &   7200 (4)    &  G2      \\
 42      &   00 40 07.71 &   40 31 12.3  & 1305-0011632  &   13.5   &   12.1    &    00400757+4031134   &   12.18  & 11.85 & 12/09/07  &   3600 (2)    &  F8      \\
 78      &   00 40 40.16 &   40 25 50.9  & 1304-0011697  &   14.4   &   14.2    &    00404007+4025532   &   13.15  & 12.79 & 14/09/07  &   7200 (4)    &  G0      \\
 100     &   00 40 54.54 &   40 31 32.7  & 1305-0012214  &   14.4   &   14.1    &    00405458+4031303   &   13.12  & 12.75 & 06/10/07  &   7200 (4)    &  F7      \\
 128     &   00 41 18.76 &   40 51 59.3  & 1308-001239   &   15.7   &   13.6    &    00411865+4051592   &   11.74  & 11.26 & 29/09/07  &   5400 (3)    &  G6      \\
 129     &   00 41 19.27 &   40 51 01.7  & 1308-0012400  &   13.8   &   13.9    &    00411911+4051017   &   12.01  & 11.48 & 05/10/07  &   5400 (3)    &  K0      \\
 273     &   00 42 29.43 &   41 29 03.0  & 1314-0013202  &   15.2   &   12.4    &    00422944+4129035   &   10.00  &  9.24 & 14/09/07  &   3600 (2)    &  K0      \\
 473     &   00 43 38.58 &   41 37 37.7  & 1316-0014855  &   nf     &   14.2    &    00433861+4137386   &   11.76  & 11.12 & 07/10/07  &   7200 (4)    &  K3      \\
 484     &   00 43 43.10 &   41 38 06.6  & 1316-0014885  &   nf     &   14.2    &    00434293+4138078   &   12.01  & 11.70 & 07/10/07  &   7200 (4)    &  F5      \\
 492     &   00 43 46.69 &   41 38 35.6  & 1316-0014901  &   16.1   &   14.1    &    00434663+4138360   &   11.55  & 11.00 & 07/10/07  &   7200 (4)    &  K2      \\
 593     &   00 44 53.31 &   42 02 15.8  & 1320-0014419  &   14.1   &   13.3    &    00445336+4202145   &   11.76  & 11.16 & 15/09/07  &   2800 (2)    &  K1      \\
 611     &   00 45 05.85 &   42 03 17.3  & 1320-0014588  &   13.5   &   13.1    &    00450551+4203177   &   11.80  & 11.45 & 27/09/07  &   5400 (3)    &  G2      \\
 662     &   00 45 38.97 &   41 56 17.3  & 1319-0014370  &   14.3   &   13.1    &    00453897+4156163   &   11.70  & 11.16 & 30/09/07  &   3600 (2)    &  K0      \\
 663     &   00 45 40.40 &   42 08 07.6  & 1321-0015992  &   13.9   &   11.5    &    00454053+4208066   &   10.46  &    -- & 12/09/07  &   2400 (2)    &  K4      \\
 665     &   00 45 41.26 &   42 19 40.4  & 1323-0017116  &   13.2   &   12.4    &    00454112+4219440   &   11.48  & 11.14 & 15/09/07  &   3600 (2)    &  G0      \\
 701     &   00 46 03.09 &   42 24 34.6  & 1324-0016254  &   14.8   &   14.0    &    00460308+4224338   &   13.08  & 12.68 & 06/10/07  &   7200 (4)    &  F6     \\
 741     &   00 46 23.72 &   41 21 16.7  & 1313-0014047  &   14.6   &   13.7    &    00462372+4121172   &   12.58  & 12.21 & 30/09/07  &   5400 (3)    &  G0      \\
 766$^2$ &   00 46 37.75 &   41 29 05.3  & 1314-0014843  &   14.1   &   12.6    &    00463749+4129053   &   13.56  & 13.23 & 28/09/07  &   3600 (2)    &  G2      \\
         &               &               &               &          &           &    00463781+4129037   &   13.23  & 12.64 & 28/09/07  &   3600 (2)    &  K1      \\
 780     &   00 46 45.85 &   42 30 48.3  & 1325-0017703  &   14.2   &   12.8    &    00464627+4230478   &   11.74  & 11.33 & 27/09/07  &   3600 (2)    &  G2      \\
 840     &   00 47 26.05 &   42 21 58.9  & 1323-0018108  &   13.0    &   12.5    &    00472611+4221583   &   11.27  & 10.92 & 27/09/07  &   3600 (2)    &  G2      \\
\hline
\end{tabular}}
\medskip
$^1$ X-ray source numbers from PFH2005 (M~31), i.e. the prefix  $\rm [PFH2005]$ should be added in front of each number.\\
$^2$ The bright USNO-B1 star given as possible optical counterpart in PFH2005 (USNO-B1 1314-0014843) is actually resolved into two brighter stars on Skinakas images (and in 2MASS).
\vspace*{-3mm}
\end{table}