\begin{table}%t2
  \caption{\label{flux}Flux densities of M~81.}
 %\centering
\par
  \begin{tabular}{cccc}   
    \hline \hline 
    \textit{N60} (65~$\mu$m) & \textit{WIDE-S} (90~$\mu$m)& \textit{WIDE-L} (140~$\mu$m)& \textit{N160} (160~$\mu$m)\\
   (Jy)& (Jy)& (Jy)& (Jy)\\ \hline
    $78\pm20$  & $189\pm40$ & $356\pm140$  & $344\pm140$  \\  \hline 
  \end{tabular} 
\end{table}