\begin{table}%t5
\caption{\label{tab_pm2}Proper motions of isolated objects in mas/yr.}
%\centering
\par
\begin{tabular}{l r r r}
\hline\hline\noalign{\smallskip}
Object & $\mu_{\alpha}\cos{\delta}$ & $\mu_{\delta}$ & $\varepsilon$ \\
\hline
ULAS~J0329$+$04 & $+$323 $\pm$ 15 &   $+$60 $\pm$ 07 & 32 \\ 
ULAS~J0819$+$21 &   $+$5 $\pm$ 14 &  $-$168 $\pm$ 07 & 24 \\
ULAS~J0945$+$07 & $+$685 $\pm$ 13 &  $-$142 $\pm$ 07 & 21 \\
ULAS~J1012$+$10 & $-$327 $\pm$ 11 &  $-$558 $\pm$ 06 & 25 \\
ULAS~J1417$+$13 &  $-$76 $\pm$ 03 &   $+$77 $\pm$ 03 & 24 \\
ULAS~J1449$+$11 & $-$242 $\pm$ 21 &  $-$244 $\pm$ 18 & 27 \\
ULAS~J2320$+$14 & $+$387 $\pm$ 05 &  $+$121 $\pm$ 02 & 11 \\
ULAS~J2321$+$13 &  $+$56 $\pm$ 15 &  $-$577 $\pm$ 10 & 10 \\
ULAS~J2342$+$08 & $+$229 $\pm$ 55 &    $-$9 $\pm$ 09 & 48 \\
\hline
\end{tabular}
\tablefoot{Proper motions come from linear fitting of the positions
given in Table~\ref{tab_astm2}.
$\varepsilon$ are the expected errors (see text).}
\end{table}