\begin{table}%t3 
  \caption{\label{tab:lensing}Comparison of the constraints on $r$ with and without lensing (here $r=0.001$).}
  %\centering
\par
$$
  \begin{array}{lcccccc}
    \hline
    \hline
    & \multicolumn{3}{c}{{\rm No lensing}} & \multicolumn{3}{c}{{\rm Lensing}} \\
    {\rm Experiment}~~ & \sigma_r/r ~~& \sigma_r^{\ell \leq 20} /r~~ & \sigma_r^{\ell > 20} /r~~ & \sigma_r /r~~
     & \sigma_r^{\ell \leq 20} /r~~ & \sigma_r^{\ell > 20} /r  \\
    \hline
    {\rm EPIC-CS} &0.18 & 0.26 & 0.29 &0.21 & 0.26 & 0.38\\
    {\rm Deep field} &0.13 & -& - &1.1 & -& - \\
    \hline
  \end{array}
$$
\end{table}