\begin{table}%t1
\caption{\label{filters}ISOCAM filters used for ISOGAL: reference wavelengths
and bandwidths, zero point~magnitudes and flux densities, and total observed
area.}
%\centerline
{\begin{tabular}{cccccc}
\hline\hline
Filter & $\lambda_{\rm ref}$ & $\Delta\lambda$ &
$ZP^a$ & $F_{mag=0}$ & Area \\
& [$\mu  \rm m$] & [$\mu \rm m$] & [mag] & [Jy] & [deg$^2$] \\
\hline
LW2 &  6.7 & 3.5 & 12.39 & 90.36 & 9.17 \\
LW5 &  6.8 & 0.5 & 12.28 & 81.66 & 0.64 \\
LW6 &  7.7 & 1.5 & 12.02 & 64.27 & 2.97 \\
LW3 & 14.3 & 6.0 & 10.74 & 19.77 & 9.92 \\
LW9 & 14.9 & 2.0 & 10.62 & 17.70 & 3.53 \\
\hline
\end{tabular}}
\smallskip
$^a$~{The~magnitude of a source with a flux
density $F_{\nu}$ expressed in~mJy is given by 
$mag=ZP-2.5 \times \log (F_{\nu}$).}
\end{table}