\begin{table}%t1
  \caption{\label{tab:errSCUBA}The various contributions to the uncertainties on the net flux of
             the SCUBA maps integrated
             in a $120''$ diameter aperture centered at
             $\alpha(2000) = 4^{\rm h}30^{\rm m}49^{\rm s}$,
             $\delta(2000) = 64^\circ 50'55''$.}
             %\centering
\par
    \begin{tabular}{l*{5}{c}}
    \hline
    \hline
      \multicolumn{1}{c}{}    &   RMS  &   Sky
      &  Calibrator &   Ratio &  Total       \\
    \hline
            850~$\mu$m        & 8\%  & 5\%
      & 5\%        & 4\%   & 12\%  \\
      450~$\mu$m        & 38\% & 4\%
      &  20\%       & 14\%  & 45\%  \\
    \hline
    \end{tabular}
   \end{table}