\begin{table}%t6
\par
  \caption {\label{tab:dustflat}Influence of dust polarisation level on component separation.}
    %\centering
\par
   $${
  \begin{array}{cccccc}
    \hline
    \hline
  {\rm Experiments} & r & r^{\rm origin} & r^{\rm pessim} & \sigma_r^{\rm origin} & \sigma_r^{\rm pessim} \\
  \hline
  {\rm Ground-based} & 0.01 & 1.84 \times 10^{-2} & 1.69 \times 10^{-2} & 1.62 \times 10^{-2} & 1.62 \times 10^{-2}\\
  {\rm EPIC-2m} & 0.001 & 8.77 \times 10^{-4} & 8.77 \times 10^{-4} & 3.68 \times 10^{-4} & 3.61 \times 10^{-4}\\
  \hline
  \end{array}}
  $$
\par
\end{table}