\begin{table}%t2
\caption{\label{t2}Details of the speckle interferometry observations.}
\small%\centerline
 {
\begin{tabular}{ccccccc}
\hline\hline
Date      &  Filter   &  Frame size    & $N_{\rm T}$  &  $N_{\rm R}$  & $t_{\rm exp}$  & Seeing     \\
2002      &           &    [pixel]     &              &               &  [ms]          & [$\arcsec$]\\
\hline
Sep. 23   &  $K$      & 300 $\times$ 300 &  1200        & 1239          & 218            & 2.2        \\
Sep. 24   &  $H$      & 256 $\times$ 256 &  1050        & 1400          & 180            & 1.5        \\
\hline
\end{tabular}}
\medskip
$N_{\rm T}$ and $N_{\rm R}$ are the numbers of recorded speckle interferograms of V645~Cyg and the reference stars, respectively. $t_{\rm exp}$ is the exposure time per frame.
\end{table}