\begin{table}%t1
\par
\caption{High spatial resolution observations of the nulear emission of NGC~1068 from radio to infrared frequencies.\label{tab1}}
%\centerline
 {\begin{tabular}{c c c l}
\hline\hline
Frequency & 		Flux & 				spatial scale &			Reference \\
 & [Jy] & [mas] & \\ \hline
$2.3\times10^{14}$ &	0.0084 & 			78 &					this work \\
$1.8\times10^{14}$ &	0.022 &				130 &					this work \\
$1.4\times10^{14}$ &	0.098 &				78 &					this work \\
$1.2\times10^{14}$ & $0.32\pm0.03$&		78 &					this work \\
$7.9\times10^{13}$ & 1.5 & 				700 &					[1] \\
$6.7\times10^{13}$ & 2.5 &					162 &					this work \\
$3.8\times10^{13}$ & 4.23 &				200 &					[2] \\
$3.0\times10^{13}$ & 	3.33 &				200 &					[2] \\
$2.5\times10^{13}$ & 	7.1 &				200 &					[2] \\
$1.6\times10^{13}$ & 	9.6 &				$290\times180$ &			[3] \\
$1.2\times10^{13}$ & 	9.4 &				200 &					[2] \\
$2.3\times10^{11}$ & 	$0.022\pm0.008$ &		$1000\times600$ &			[4] \\
$1.15\times10^{11}$ &	$0.023\pm 0.05$ &		1400 &					[4] \\
$4.3\times10^{10}$ &	$0.019 \pm 0.003$ &	75 &					[5] \\
$2.25\times10^{10}$ & $0.016 \pm 0.006$ &	75 &					[5] \\
$8.4\times10^{9}$ &	$0.0054 \pm 0.0005$ &	$11.0\times3.7$ &			[6] \\
$5.0\times10^{9}$ &	$0.0091 \pm 0.0008$ &	$16.6\times11.2$ &			[6] \\
$5.0\times10^{9}$ &	0.0051 &			$14\times3$ &				[7] \\
$1.7\times10^{9}$ &	$<$$0.0026$ &			$14\times12$ &			[7] \\
$1.4\times10^{9}$ &	$<$$6\times10^{-5}$ &	$16.0\times7.6$ &			[6] \\ \hline
\end{tabular}}
\par
\smallskip
 [1] \citet{Mar03}; [2] \citet{Boc00}; 
 [3] \citet{Tom01}; [4] \citet{Kri06};
 [5] \citet{Mux96}; [6] \citet{Gal04};
 [7] \citet{Roy98}. 
\end{table}