\begin{table}%T1
\caption{Parameters for the imaging polarimetry of Uranus and Neptune
  for November 30, 2003. The planet parameters were taken from the
  "The Astronomical Almanac 2003''. The South pole coordinates are
  given as distance from the disk center and position angle 
  (see Fig.~\ref{iurannept}). For the filters the central 
  wavelength $\lambda_{\rm c}$ and the band width $\Delta\lambda$ (FWHM) are given.}
\label{log}
%\centerline
{\small
\begin{tabular}{lcccc}
\hline\hline
               & Uranus         & Neptune & $\lambda_{\rm c}$  & $\Delta\lambda$ \\
               &                &         & [nm]         & [nm]            \\
\hline
planet parameters&&&\\
~~~diameter       & 3.51$''$    & 2.24$''$ \\
~~~phase angle    & 2.8$^\circ$ & 1.7$^\circ$ \\
~~~S pole dist.   & 1.62$''$    & 0.97$''$ \\
~~~S pole PA    & 78$^\circ$  & 169$^\circ$ \\  
exposures&&&\\
~~~$R$ (Bessell)  & --           & $3\times (4\times 1~{\rm s})$ &
               644 & 167 \\
~~~$i$ (Gunn)     & $3\times(4\times1$~s) 
                                    & $3\times(4\times4$~s) & 
               803$^a$ & 151$^a$ \\
~~~$z^b$ (Gunn)     & $3\times(4\times4$~s)
                        & $3\times(4\times10$~s) &
                $^{a,b}$ & $^{a,b}$ \\
~~~$\lambda_{673}$+mask &  $4\times300$~s & --    & 673   & 6.1  \\
~~~$\lambda_{729}$+mask &  $4\times300$~s & --    & 729   & 7.6  \\
\hline
\end{tabular}}
\medskip
$^a$ The effective central wavelengths $\lambda_{\rm c}$ and filter widths
$\Delta\lambda$ differ significantly if the efficiency curve of the 
detector is included. They are for the $i$-filter $\lambda_{\rm c} = 786$~nm 
and $\Delta\lambda=140$~nm and for the $z$-filter 
$\lambda_{\rm c} = 890$~nm and $\Delta\lambda= 100$~nm. \\
$^b$ the $z$-filter is a long-wave pass filter for $\lambda>837$~nm.
\par
\end{table}