\begin{table}%t9
\caption{\label{propermotions}Proper motions, distances and transverse velocities of the seven ROSAT discovered INSs. Upper limits are at the 2$\sigma$ level.}
%\centerline
{\small\begin{tabular}{lllll}
\hline\hline
Name            &   $\ \ \ \ \mu$  &  Distance  	& $V_{\rm T}$   & Ref\\ 
                &   (\masyr) 	   &	(pc)		& (km\,s$^{-1}$)&  \\
\hline
\rxdixhuit      &   333\,$\pm$\,1	   & 161$^{+18}_{-14}$  & 254           & 1,\,2\\ 
\rxzerosept     &   107.8\,$\pm$\,1.2  & 361$^{+172}_{-88}$	& 184           & 3,\,4\\ 
\rxseize        & 155.0\,$\pm$\,3.1    &  $\sim$390	& 286           & 5,\,6,\,7\\
\rbsdouze       & 220.3\,$\pm$\,25     & 400--800            & 417--835       & 8,\,7,\,9\\ 
\rbsdixsept     &  --              & $\sim$430         & --             & 7\\
\rxzerohuit     & $\leq$86        & $\sim$235         & $<$96        & 7,\,9\\
\rxzeroquatre   & $\leq$123        & $\sim$345         & $<$200       & 7,\,9\\
\hline
\end{tabular}}
\par
References: 1) \cite{kaplan2002b}; 2) \cite{vankerkwijk2007}; 3) \cite{motch2003}; 4) \cite{kaplan2007}; 5) \cite{motch2005}; 6) \cite{zane2006}; 7) \cite{posselt2007}; 8) \cite{schwope2005}; 9) this work.
\end{table}