\begin{table}%t4
\caption{\label{ommag}Photometry of the OM~counterparts lying within 5\arcsec\ 
from X-ray sources.
The number in the first column refers to our internal numbering 
scheme (see Table~\ref{crate}).}
%\centering
\par
\begin{tabular}{l c c c c} 
\hline\hline
N & $V\pm\sigma_{{V}}$ & {\it UVW}$1\pm\sigma_{{{\it UVW}1}}$ &{\it UVM}$2\pm\sigma_{{{\it UVM}2}}$ & Sep.\\
& (mag)& (mag)&(mag)&(\arcsec) \\
\hline
10 &$15.57\pm0.04$   &$17.56\pm0.07$  &$19.24\pm0.26$ & 1.7  \\ 
11 &$19.34\pm0.18$   &$19.20\pm0.15$  &$18.78\pm0.25$ & 1.8   \\
13 &$17.72\pm0.06$   &$19.43\pm0.15$  &$20.02\pm0.34$ & 1.0  \\
14 &$19.76\pm0.19$   &$19.30\pm0.16$  &$19.22\pm0.21$ & 4.4\\
17 & $\left\{ \begin{array}{c} 19.84\pm0.17 \\ 20.00\pm0.16 \end{array} \right. $  & $\left. \begin{array}{c} 19.38\pm0.22 \\ 19.43\pm0.19  \end{array} \right. $ & $\left. \begin{array}{c} 18.86\pm0.17 \\ 18.56\pm0.18 \end{array} \right. $& $\left. \begin{array}{c} 2.8 \\  3.7 \end{array} \right. $ \\
20 &$17.25\pm0.06$   &$16.23\pm0.03$  &$16.04\pm0.03$ & 4.4 \\
22 &$19.27\pm0.13$   &$18.34\pm0.13$  &$19.00\pm0.15$ & 0.2   \\
27 & $\left\{ \begin{array}{c} 19.20\pm0.13 \\ 19.44\pm0.20 \end{array} \right. $  & $\left. \begin{array}{c} 19.28\pm0.18 \\  19.23\pm0.19 \end{array} \right. $ & $\left. \begin{array}{c} 19.73\pm0.28 \\ 18.89\pm0.17 \end{array} \right. $& $\left. \begin{array}{c} 1.8 \\ 4.5  \end{array} \right. $ \\
28 &$18.98\pm0.13$   &$19.74\pm0.21$  &$19.90\pm0.32$ & 3.6   \\
30 &$16.54\pm0.05$   &$14.89\pm0.03$  &$14.60\pm0.02$ & 3.7  \\
\hline
\end{tabular}
\end{table}