\begin{table}%t1
 %\centering
 \caption{Software aperture polarimetry of
the reflection knots in S87E and S87W.}\label{t1}
\begin{tabular}{cccccccccc} 
\hline\hline Knot & $\Delta$$x$$^{a}$ &
$\Delta$$y$$^{a}$ & Aperture$^{b}$ & $P_{J}$ & $\theta_{J}$ &
$P_{H}$ & $\theta_{H}$ & $P_{K}$ &
$\theta_{K}$ \\
& (arcsec) & (arcsec) & (arcsec) & (\%) & (deg) & (\%) & (deg) &
(\%) & (deg) \\ \hline\noalign{\smallskip}
\mbox{DES-S87}E & 6.0     &$-$2.1 &5.0 &$7\pm0.25$  & 21 & $3\pm0.8$ & 11& $2\pm0.7 $  &89 \\
A        & 12.6    &$-$1.0 &6.0 &$25\pm1.2$  & 19 & $10\pm1.6$& 6 &$7\pm1.5$   &5\\
B        & 1.5     &   4.5 &6.0 &$22\pm2.5$  & 47 & $13\pm1.4$& 44&$11\pm2.3$  &43\\
C        & 4.8     &$-$14.8&8.0 &$32\pm1.5 $ & 107&$20\pm4.5$ &106&$16\pm1.2$  &91\\
D        & $-$78.5 & 5.8   &6.0 & $31\pm1.5$ & 86 &$22\pm2.0$ &97 & $12\pm1.2$ &98\\
E        & $-$79.0 & $-$3.7&6.0 & $29\pm3.8$ & 88 &$19\pm2.4$ &92 & $18\pm1.8$ &79\\
\hline
\end{tabular}
\par
\begin{list}{} 
\item $^a$ The position are offset from $K$-peak of
S87E. 
\item $^b$ Software aperture employed for polarimetry.
\end{list}
\end{table}