\begin{table}%t3
%\centering
\par
\caption{\label{t3}Flux densities of the radio core.}
\begin{tabular}{rcl}
\hline
\hline
\noalign{\smallskip}
Freq.  & S$_{\rm core}$ & Observing \\
  {[MHz]} & [mJy]  & date\\
\hline
 619 & 1.52 & 2008, Mar. 8 \\
1384 & 2.17 & 2002, May 31 \\
2495 & 2.50 & 1999, Mar. 7 \\
4860 & 2.53 & 2008, Jun. 5 \\
4910 & 2.57 & 2002, Jul. 30\\
\hline
\end{tabular}
\end{table}