\begin{table}%t4
%\begin{minipage}[t]{\textwidth}
\caption{\label{tab_resmag}Results of follow-up investigations.}
%\centering
\par
\begin{tabular}{l c l l l c c c c}
\hline \hline
Candidate & $r$ & $R$ & $U-B$ & $B-R$ & $LR$ & $P_{\rm{chance}}$ & $e$ & $\log(f_{\rm{X}}/f_{R})$$^a$\\ 
 & (arcsec) &  &  &  &  & (\%) & & \\
\hline
\candosf  & 1.55 & 20.13(3)   & ?	 & 1.35(3)    & 8.4  & 2.8  & 0.037 & 0.18 \\
\candtoe  & 2.75 & 24.51(9)   & ?	 & $\ga$~2.0 & 1.2  & 22.4 & 0.178 & 1.93 \\
          & 1.68 & 24.58(9)   & ?	 & $\ga$~1.9 & 1.2  & 22.4 & 0.162 & 1.96 \\
\candtfoe & 1.20 & 22.15(4)   & $-0.51(8)$ & 0.93(7)    & 15.2 & 2.3  & 0.068 & 0.77 \\
\candtfie & 0.67 & 21.37(3)   & $-0.13(7)$ & 1.43(4)    & 32.1 & 1.7  & 0.022 & 0.41 \\
\candtsf  & 1.26 & 23.78(9)   & $-1.08(16)$& 1.06(15)   & 6.0  & 6.4  & 0.156 & 1.40 \\
\candszf  & 1.34 & 21.64(4)   & $-1.08(4)$ & 0.76(5)    & 25.5 & 1.0  & 0.098 & 0.61 \\
\candseo  & 1.80 & 22.19(4)   & $-0.71(4)$ & 0.74(4)    & 8.4  & 4.1  & 0.029 & 0.57 \\
\hline
\end{tabular}
\smallskip
$^a$ The X-ray flux is computed in the 0.15--3~keV energy band assuming an absorbed power-law model.
\end{table}