\begin{table}%T2
%\centering
\par
\caption{The values for $R_{\rm cusp}$ taken from \citet{keeton02} 
for four lens systems showing a typical cusp geometry.}
\label{tab:obscusp}
\begin{tabular}{p{0.5\linewidth}c}
\hline
\hline
\noalign{\smallskip}
Lens & $R_{\rm cusp}$\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
B2045+265 & $0.52 \pm 0.04$\\
B0712+472 & $0.26\pm 0.06$\\
RX~J0911+0551 & $0.22\pm 0.06$\\
B1422+231 & $0.18 \pm 0.06$\\ 
\hline
\end{tabular}
\end{table}