\begin{table}%t7
\caption{Optical and UV magnitudes.}
%\centerline
{
%\scriptsize
\begin{tabular}{llccc}
\hline
\hline
\noalign{\smallskip}
Source & Filter ($\lambda$)& Observed  & De-reddened    & De-reddened   \\
      &                    & magnitude & magnitude (SMC)$^a$ & magnitude (X-ray)$^b$\\
\noalign{\smallskip}
\hline
\noalign{\smallskip}
\noalign{\smallskip}
NGC~1692  &$U$ (3440~\AA) & 16.4 & 16.2 & 13.1\\
\noalign{\smallskip}
         &UVW1 (2910~\AA) & 19.4 & 19.1 & 16.0\\
\noalign{\smallskip}
         &UVM2 (2310~\AA) &$>$22.0 &$>$21.6 &$>$18.5\\
\noalign{\smallskip}
\noalign{\smallskip}
 PKS~0625-35 & $U$ (3440~\AA) & 15.9 & 15.6 & 15.0\\
\noalign{\smallskip}
         &UVW1 (2910~\AA) & 15.7 & 15.3 & 14.7\\
\noalign{\smallskip}
         &UVM2 (2310~\AA) & 15.8 & 15.2 & 14.6\\
\noalign{\smallskip}
\noalign{\smallskip}
3C~88$^c$     &$U$ (3440~\AA) & 18.6 & 18.0 & 18.1\\
\noalign{\smallskip}
         &UVW1 (2910~\AA) & 18.6 & 17.8 & 18.0\\
\noalign{\smallskip}
         &UVM2 (2310~\AA) & 18.6 & 17.4 & 17.6\\
\noalign{\smallskip}
\noalign{\smallskip}
3C~444    &$U$ (3440~\AA) & 19.4 & 19.3 & 18.7\\
\noalign{\smallskip}
         &UVW1 (2910~\AA) & 19.2 & 19.0 & 18.5\\
\noalign{\smallskip}
         &UVM2 (2310~\AA) & 19.6 & 19.4 & 18.8\\
\hline
\end{tabular}}\medskip
  $^a$ Magnitude de-reddened using a SMC-type extinction law (see text for details).
$^b$ Magnitude de-reddened using a reddening  $A(V)/N_{\rm H}=5.3\times 10^{-22}$ with $N_{\rm H}$ 
derived fromthe \mbox{X-ray} spectral fitting.
$^c$ For 3C~88 only the $U$ filter yielded a value for the magnitude. The same magnitude was used for
the other 2 filters to allow a direct comparison with the other targets.  
\label{tab7}
\end{table}