\begin{table}%t3
\caption{\label{sed}Integrated flux densities on the observed sources.}
%\centerline
{\small
\begin{tabular}{cccc}
\hline
\hline
Source& Frequency& Flux density&Reference\\
& MHz& Jy&\\
\hline
NGC~0628& 57.5& $2\pm1$&1\\
&324.4   &  $0.49	\pm0.03$  & This work\\ 
&1400	&  $0.15	\pm0.01$ & 2\\
&1515 & $0.16 \pm 0.01$ & This work\\
&4850	&  $0.060 \pm	0.005$&3\\
\hline
NGC~3627 & 57.5&$2.3\pm 0.7$&1	\\
&160 &$1.6 \pm	0.3^a$& 4\\
&325.5 & $0.97 \pm 0.03$& This work\\
&408&$0.93 \pm	0.05$$^a$& 5\\
&611& 	     $0.87 \pm 0.1^a$& 4\\
&1370&	  $0.5  \pm   0.01$& 6\\
&1425 & $0.38  \pm   0.01$& This work\\
&2695&      $0.2  \pm      0.04$ & 4\\
&4850&	  $0.14\pm   0.02$& 7\\
%&5000&	  $0.17\pm    0.0$2&	1975AJ\\
\hline
NGC~7331 & 74&$1.12\pm  0.18$& 8	\\
& 325 &  $0.935\pm   0.004$&9 \\
& 325.9& $0.94\pm 0.02$& This work\\
%&750 &	  1&		1964AJ.....69..277H\\
&1489   &   $0.32\pm0.01$ & This work\\
&1400 & $0.33 \pm 0.01$ & 2\\
&1369 & $0.35 \pm 0.01$ & 6\\
&2380	& $  0.18\pm       0.01$&	10\\
&4850	& $ 0.096\pm       0.013$&	7\\
\hline
\end{tabular}}
\par
\medskip
$^a$ Flux density scale from \cite{wyllie69}.
\\
References and telescopes: 1.~\cite{israel90}: Clark Lake radio Telescope; 2.~\cite{NVSS}: NVSS -- NRAO VLA D array; 3.~\cite{GB6}: NRAO Green Bank Telescope; 4.~\cite{CSIRO75}: CSIRO telescope; 5.~\cite{large81}: Molonglo Radio Telescope; 6.~\cite{braun07}: Westerbork Telescope WSRT; 7.~\cite{gregory91}: NRAO Green Bank; 8.~\cite{cohen07}: NRAO VLA B array; 9.~\cite{rengelink97}: WENSS -- WSRT; 10.~\cite{dressel78}: Arecibo Telescope.
\end{table}