\begin{table}%t2
%\centering
\par
\caption {\label{table:parametersSimpleModel}Parameters of our best-fitting geometrical model composed of two
      rings and an extended background component.}
    \begin{tabular}{ccc}
      \hline\hline
      Parameter  & Description &  Value \\
      \hline
      S1  &  1${\rm st}$ ring size & $24.8\pm3.1$~mas \\
      F2  &  2${\rm nd}$ ring flux fraction & $34\pm7$\%  \\
      RA   & 2${\rm nd}$ ring RA-offset & $0.79\pm1.7$~mas  \\
      Dec   & 2${\rm nd}$ ring Dec-offset & $-6.0\pm2.3$~mas  \\
      S2  & 2${\rm nd}$ ring size & $13.2\pm1.0$~mas  \\
      F3  & Background flux fraction  & $46\pm11$\%  \\
      \hline
    \end{tabular}
\end{table}