\begin{table}%t1
\caption{\label{tab1}Summary of VERA observations in R~Aqr. We give the relative
positions of the central star with respect to the J2000~Hipparcos coordinates (and their uncertainties at 2$\sigma$-level).}
%\centering
\small                  
\begin{tabular}{lcccccl} 
\hline\hline \noalign{\smallskip}      
Date & \multicolumn{2}{c}{Star's relative coordinates (mas)} &
\multicolumn{3}{c}{Number of spots}  & Comments \\  
    & $\Delta$(AR) & $\Delta$(Dec) & $v=1$ $J$ = 1--0 & $v=2$ $J$ = 1--0 &
coincident $v=1,2$  &  \\   
\hline                     
23 Dec. 2004 & 135.3 (4.2) & --133.1 (1.4) & 7 & 41 & 1 (1) &  \\
27 Sep. 2005 & 161.4 (0.5) & --154.9 (0.8) & 4   & 76  & 0 (0) &  \\ 
23 Nov. 2005 & 164.5 (0.3) & --160.7 (0.5) & 79  & 77  & 3 (11) &  \\
24 Dec. 2005 & 166.4 (0.3) & --162.4 (0.6) & 66 & 75 & 11 (16) &  \\
14 Feb. 2006 & 172.7 (0.3) & --165.2 (0.5) & 116 & 157 & 0 (1) &  \\
04 Mar. 2006 & 175.1 (0.3) & --165.7 (0.5) & 56  & 196 & 0 (5) &  \\
08 May 2006 & -- & -- &   &  & -- & no absolute astrometry \\
11 Jul. 2006 & -- & -- &   &  & -- & no absolute astrometry \\
26 Jul. 2006 & -- & -- &   &  & -- & no absolute astrometry \\
30 Aug. 2006 & 195.7 (1.0) & --181.5 (0.8) & 24  & 31  & 0 (0) &  \\
13 Oct. 2006 & 196.6 (2.4) & --188.4 (1.0) & 41  & 73  & 4 (6) &
 poor fitting\\
\hline
\end{tabular}
\tablefoot{The spot coincidences have been estimated for spatial distances less than~1/3 (and than~2/3) of the~beam.}
\end{table}