\begin{table}%t1
\caption{Measurements for the clusters~M~1, M~3, M~6 and~M~8 in NCG~1808.}\label{table measurements}
\small %\centerline
 {\begin{tabular}{lcccccccc} 
\hline\hline
&\multicolumn{2}{c}{M~1}&\multicolumn{2}{c}{M~3} &\multicolumn{2}{c}{M~6}&\multicolumn{2}{c}{M~8}\\ \hline
\multicolumn{9}{c}{Positions with respect to M~1 [arcsec]}\\
$\Delta\alpha$~[arcsec]& \multicolumn{2}{c}{0} & \multicolumn{2}{c}{--$1.99 \pm 0.1$} & \multicolumn{2}{c}{$5.82\pm0.1$} & \multicolumn{2}{c}{$2.71 \pm 0.1$} \\ 
$\Delta\delta$~[arcsec]& \multicolumn{2}{c}{0} & \multicolumn{2}{c}{--$3.76 \pm 0.1$} & \multicolumn{2}{c}{--$5.25 \pm 0.1$} & \multicolumn{2}{c}{--$5.51\pm0.1$} \\ 
\hline
\multicolumn{9}{c}{Flux densities [mJy]}\\
 & \multicolumn{2}{c}{Value}& \multicolumn{2}{c}{Value}& \multicolumn{2}{c}{Value}& \multicolumn{2}{c}{Value}\\ 
 \hline
& Low    & High    & Low  & High     & Low      & High     & Low      & High  \\ 
$R$ & 2.2 &     3.1 &     0      &     0.2  &     0    &     0.2  &     0 &  0.2\\                   $J$ &   11.  &    20.  &     0      &     1.2  &     0    &     1.3  &     0    &     1.7  \\        $K$s &   22.  &    39.  &  0  &     2.0  &     0    &     2.2  &     0    &     2.9  \\              $L'$  &   17.  &    38.  &     0      &     2.8  &     0    &     3.4  &     0.4  &     4.8  \\      10.4\micro~  &  180.  &   280.  &     0  &  12.   &   0    &    11.   &     6.4  &    23.   \\                                                                                 
11.9\micro~  &  400.  &   670.  &    11.     &    50.   &    10.   &    76.   &    18.   &    99.   \\                                                                                 
12.9\micro~  &  700.  &  1100.  &    25.     &    90.   &    29.   &   110.   &    95.   &   220.   \\                                                                                 
\hline\noalign{\smallskip}
\multicolumn{9}{c}{Line fluxes [$10^{-15}$~erg~s$^{-1}~{\rm cm}^{-2}$]} \\
$^*$\Pa &\multicolumn{2}{c}{$150.\pm   30$.} & \multicolumn{2}{c}{$49.\pm    10$.} & \multicolumn{2}{c}{    $9.9\pm    2.0$   } & \multicolumn{2}{c}{$24.\pm  5$.} \\ 
$^*$\Bd      &\multicolumn{2}{c}{  $<$4. } & \multicolumn{2}{c}{   $<$1.4            } & \multicolumn{2}{c}{$3.9\pm0.8$} & \multicolumn{2}{c}{$2.8\pm  0.6$} \\ 
\HH~1--0S(3)  &\multicolumn{2}{c}{$<$12.} & \multicolumn{2}{c}{$<$1.2} & \multicolumn{2}{c}{$<$1.6} & \multicolumn{2}{c}{$<$1.6} \\ 
\HH~1--0S(2)  &\multicolumn{2}{c}{$<$10.} & \multicolumn{2}{c}{$<$0.6} & \multicolumn{2}{c}{    $0.8 \pm0.2$} & \multicolumn{2}{c}{$1.1\pm0.3$} \\ 
HeI &\multicolumn{2}{c}{$<$5.} & \multicolumn{2}{c}{$1.3\pm0.3$} & \multicolumn{2}{c}{$2.1\pm0.5$} & \multicolumn{2}{c}{$2.2\pm0.5$} \\ 
\HH~1--0S(1)  &\multicolumn{2}{c}{$5.8 \pm     1.2$} & \multicolumn{2}{c}{$0.9\pm  0.2$} & \multicolumn{2}{c}{$1.2 \pm    0.3$} & \multicolumn{2}{c}{$1.3 \pm  0.3$} \\ 
\Bg &\multicolumn{2}{c}{$9.6 \pm 1.9$} & \multicolumn{2}{c}{$2.6 \pm0.6$} & \multicolumn{2}{c}{$5.4 \pm 1.1$} & \multicolumn{2}{c}{$4.2 \pm 0.9$} \\ 
\HH~1--0S(0)  &\multicolumn{2}{c}{$<$2.} & \multicolumn{2}{c}{$<$0.5} & \multicolumn{2}{c}{    $0.6\pm 0.2$} & \multicolumn{2}{c}{$0.8\pm  0.2$} \\ 
\HH~2--1S(1)  &\multicolumn{2}{c}{   $<$2.} & \multicolumn{2}{c}{$<$0.5} & \multicolumn{2}{c}{$0.6\pm0.2$} & \multicolumn{2}{c}{$<$6.5} \\ 
\HH~1--0Q(1)  &\multicolumn{2}{c}{   $<$5.5 } & \multicolumn{2}{c}{$1.0 \pm0.2$ } & \multicolumn{2}{c}{$1.7 \pm0.4$} & \multicolumn{2}{c}{$1.5\pm 0.3$} \\ 
\HH~1--0Q(3)  &\multicolumn{2}{c}{$<$5.5} & \multicolumn{2}{c}{$1.2\pm0.3$} & \multicolumn{2}{c}{    $1.0 \pm0.2$} & \multicolumn{2}{c}{$1.1 \pm 0.3$} \\ 
PAH+\Pfd &\multicolumn{2}{c}{--} & \multicolumn{2}{c}{--} & \multicolumn{2}{c}{$84.\pm    17.$} & \multicolumn{2}{c}{$100.\pm 20.$} \\ 
\Pfg &\multicolumn{2}{c}{--} & \multicolumn{2}{c}{--} & \multicolumn{2}{c}{$3.2 \pm    0.7$} & \multicolumn{2}{c}{$5.4 \pm 1.1$} \\ 
\Ba &\multicolumn{2}{c}{--} & \multicolumn{2}{c}{--} & \multicolumn{2}{c}{$20.\pm 4$.} & \multicolumn{2}{c}{$25.\pm 5.$} \\ 
\hline
\multicolumn{9}{c}{Radio data \citep{Collison94}}\\
\\
$\alpha^{\rm 6~cm}_{\rm 3.6~cm}$ & \multicolumn{2}{c}{--0.61} & \multicolumn{2}{c}{--0.28} & \multicolumn{2}{c}{--} & \multicolumn{2}{c}{--0.57} \\
3.6~cm [mJy] & \multicolumn{2}{c}{8.96} & \multicolumn{2}{c}{0.93} & \multicolumn{2}{c}{0.58} & \multicolumn{2}{c}{0.76} \\
\hline
\end{tabular} }
\medskip
$^*$ These flux values and their associated uncertainties must be taken with caution\\ since the atmospheric features are strong in this region of the spectrum. 
\end{table}