\begin{table}%T3
\caption{\label{table:meanfluxes}Average flux densities of M~81*, $S_{\rm 3~mm}$ and $S_{\rm
   1~mm}$, measured at $\nu_{\rm 3~mm}$ and $\nu_{\rm 1~mm}$ during
   the three epochs of the campaign.  The mean and standard deviation
   (not the error of the mean) were calculated from the unweighted
   individual measurements shown in Fig.~\ref{Fig:fluxes}. The last
   column lists the average spectral indices and their standard
   deviation (not the error of the mean) calculated from all
   individual measurements as shown in the right panels of
   Fig.~\ref{Fig:index}.}
\small      
%\centering
\par
\begin{tabular}{ccccccc}
\hline\hline       
Start [UT] & End [UT] & $\nu_{\rm 3~mm}$ [GHz] & $S_{\rm 3~mm}$ & $\nu_{\rm 1~mm}$ [GHz] &  $S_{\rm 1~mm}$ & $\alpha$ \\
\hline                    
24-Feb.-2005~01:11 & 24-Feb.-2005~19:45 & 115.3 & $88.0\pm11.7$ & 230.5 & $85.6\pm17.8$ & $-0.06\pm0.16$ \\
14-Jul.-2005~06:50 & 15-Jul.-2005~13:51 & 80.5 & $241.2\pm33.8$ & 241.4 & $181.2\pm39.1$ & $-0.38\pm0.17$ \\
19-Jul.-2005~23:17 & 20-Jul.-2005~16:07 & 86.2 & $118.7\pm11.4$ & 218.2 & $74.8\pm13.3$ & $-0.51\pm0.15$ \\
\hline                  
\end{tabular}
\end{table}