\begin{table}%t3
 \caption {\label{tab3}Seven objects with SDSS spectra matched in UKIDSS.} 
%\centerline
 { \begin{tabular}{c c c c c c l} \hline\hline
SDSS Name & UKIDSS {\it Y} & UKIDSS {\it J} & UKIDSS {\it H} & UKIDSS {\it K} & Proper motion$^{{a}}$ & Proper motion \\
 & & & & & ($^{\prime\prime}$yr$^{-1}$) & Angle$^{{b}}$ \\
\hline
SDSS J012052.58+151827.3 & 17.11~$\pm$~0.02  & 16.09~$\pm$~0.01  & 15.50~$\pm$~0.01  & 14.92~$\pm$~0.01  &  0.04~$\pm$~0.02 & 105~$\pm$~36 \\
SDSS J084751.48+013811.0 & 17.38~$\pm$~0.02  & 16.09~$\pm$~0.01  & 15.22~$\pm$~0.01  & 14.45~$\pm$~0.01  &  0.03~$\pm$~0.02 & 242 ... \\
SDSS J090347.55+011446.0 & 17.58~$\pm$~0.02  & ... & 15.59~$\pm$~0.01  & 14.96~$\pm$~0.01  &   0.03~$\pm$~0.02 & 259 ... \\
SDSS J091714.76+314824.8 & ... & 16.36~$\pm$~0.01  & ... & ... & 0.03~$\pm$~0.03 & 345 ... \\
SDSS J100817.07+052312.9 & ... & ... & 16.36~$\pm$~0.02  & 15.89~$\pm$~0.03  &  0.21~$\pm$~0.03 & 139~$\pm$~10 \\
SDSS J154502.87+061807.8 & 17.35~$\pm$~0.02  & 16.21~$\pm$~0.01  & 15.62~$\pm$~0.01  & 15.07~$\pm$~0.01  &   0.14~$\pm$~0.04 & 251~$\pm$~25 \\
SDSS J155215.38+065041.5 & ... & ... & 15.93~$\pm$~0.01  & 15.32~$\pm$~0.01  & 0.02~$\pm$~0.04 & 356 ... \\
\hline
\end{tabular}}
\par
\smallskip
 $^{{a}}$ SDSS-UKIDSS data-base proper motions -- found by dividing the difference between
the SDSS and UKIDSS coordinates (from the respective databases) by
the observational epoch difference.
Standard errors are calculated using the major axes of the position error ellipses from SDSS and 
UKIDSS;
 $^{{b}}$ error ellipses of SDSS and UKIDSS overlap for some
objects for which position angle errors are not meaningful.
\end{table}