\begin{table}%t2
\caption{\label{antpat}Antenna Pattern factors. }
%\centerline
{
\begin{tabular}{rrr}
\hline\hline
PSR & Fraction of available energy & $ \Delta SNR  /SNR_{\rm Wiener}$ \\
\hline
0024$-$7204J & $ 0.286 $ & $ 9.3 \% $ \\
0218+4232 & $ 0.290 $ &  $ 18.0 \% $\\
1939+2134 & $ 0.256 $ & $ 18.2 \% $ \\
\hline
\end{tabular}}
\smallskip
\par
First column: the complement to
1 of these values represent the energy loss respect to the optimal
orientation and polarization; second column: percentage of SNR
loss respect to the optimal filter. 
\end{table}