\begin{table}%T3
%\centering
\par
\caption{X-ray sources with bright optical counterparts that are known from other catalogues than the USNO or GSC. The last column yields the reference for the spectral type (FJL = FitzGerald et~al.  \cite{fitz}, vdA~= van~den~Ancker et~al.  \cite{vdA2}). The photometric data are taken from FJL, except for Th\'e~7 and 26 for which we adopt results from Eggen (\cite{eggen}).\label{cross-id}}
\begin{tabular}{c c r r c l}
\hline\hline
\#& cross-ID & \multicolumn{1}{c}{$V$} & $B-V$ & Spect.\ type & Ref. \\
\hline
17 & Th\'e~7   & 12.73 & 0.32 &               &    \\
24 & Th\'e~26  & 12.87 & 0.76 & A1~IV        & vdA\\
26 & HD~317~857 & 10.30 & 0.29 & B8~IV/B9~IV  & FJL, vdA\\
27 & HD~317~847 & 10.33 & 0.10 & B2~V         & FJL\\
38 & FJL~7     & 12.62 & 0.28 &               &    \\
39 & FJL~9     & 10.84 & 0.14 &               &    \\
42 & FJL~11    & 15.10 & 1.06 &               &    \\
44 & HD~159~176 &  5.64 & 0.04 & O7~V + O7~V & FJL\\
55 & FJL~23    & 13.79 & 0.95 & G5~V         & vdA\\
56 & FJL~24    & 11.35 & 0.18 & B8~Vne/B7~V & FJL, vdA\\
\hline
\end{tabular}
\end{table}