\begin{table}%tC.1
\caption{\label{table:uncertainties}Assessment of the calibration uncertainty for the ISOPHOT~maps. Columns are (1)~name of the field; (2)~wavelength; (3)~average surface brightness of the map; (4)~difference between calibration measurements performed before and after each map; (5)~difference between actual dark current measurements and default dark current values; (6)~difference between the independently calibrated absolute photometry measurements and raster maps; and (7)~difference between partially overlapping maps. These uncertainties have been converted to correspond to the uncertainties at zero hydrogen column density using the fit parameters listed in~Table~\ref{table:fit}.}
\par
\small%\centerline
 {
\begin{tabular}{lrccccc}
\hline \hline
   Field    &  $\lambda$    
            &    $\langle S \rangle$                  
            &  $\Delta$(FCS)   
            &  $\Delta$(DC)
            &  $\Delta$(Abs.)              
            &  $\Delta$(Join) \\
            & ($\mu$m)                    
            &   MJy~sr$^{-1}$     
            &   MJy~sr$^{-1}$     
            &   MJy~sr$^{-1}$    
            &   MJy~sr$^{-1}$       
            &   MJy~sr$^{-1}$ \\
\hline
        EBL22 &   90 &   9.0 &   0.12 &   0.43 &   --1.15 &   --    \\
        EBL22 &  150 &   5.7 &  --0.06 &   1.44 &   --0.64 &   --        \\
        EBL22 &  180 &   4.5 &  --0.38 &   0.48 &   --0.28 &   --        \\
    EBL22$^1$ &   90 &   6.5 &  --1.09 &   0.22 &   --     &  --0.17     \\
    EBL22$^1$ &  150 &   3.6 &   0.02 &   0.30 &   --     &   0.07     \\
    EBL22$^1$ &  180 &   4.5 &   0.04 &   1.00 &   --     &  --0.50     \\
        EBL26 &   90 &  20.6 &  --0.09 &  --0.80 &   --1.66 &       --    \\
        EBL26 &  150 &   4.3 &  --0.05 &  --0.28 &   --0.09 &       --    \\
        EBL26 &  180 &   3.7 &   0.06 &  --0.20 &    0.11 &       --    \\
       NGP(N) &   90 &   7.8 &   0.49 &  --0.19 &   --0.50 &   0.58     \\
       NGP(N) &  150 &   5.1 &   0.06 &  --0.30 &   --0.35 &   0.19     \\
       NGP(N) &  180 &   4.8 &   0.22 &  --0.22 &   --0.26 &   0.39     \\
       NGP(S) &   90 &   6.9 &  --0.32 &   0.26 &   --     &  --0.49     \\
       NGP(S) &  150 &   4.7 &   0.04 &  --0.30 &   --     &  --0.18     \\
       NGP(S) &  180 &   4.7 &   0.05 &  --0.31 &   --     &  --0.31     \\
\hline
\end{tabular}}
\medskip
$^1$ The narrow strip map.
\end{table}