\begin{table}%t3
%\centering
\par
\caption{\label{t:td_results_ap}Time delay results for the $D^2_{4,2}$ dispersion estimate applied
  to the complete aperture photometry data set. A 5th~order polynomial
  was used to model additional variability in the quasar light curves.
  As noted in the text, other polynomials gave very similar results.
  Estimated errors are 1$\sigma$ limits.}
\begin{tabular}{ccc} 
\hline \hline\noalign{\smallskip}
Statistic    & $\delta$ & Time delay (days) \\ 
\noalign{\smallskip}\hline \noalign{\smallskip}
$D^2_{4,2}$  &  1       & 424.8 $\pm$ 1.6  \\
$D^2_{4,2}$  &  2       & 424.3 $\pm$ 0.6  \\
$D^2_{4,2}$  &  3       & 424.8 $\pm$ 1.3  \\
$D^2_{4,2}$  &  4       & 424.7 $\pm$ 0.7  \\ 
\hline
\end{tabular}
\end{table}