\begin{table}%t2
  \caption{\label{tab:receivers}Receiver characteristics.}
  %\centerline
{                   
  \begin{tabular}{ccccccc} 
    \hline\hline                 
    $\nu$ &$\Delta\nu$ &$T_{\rm sys}$ &$\Gamma$  &$\theta$  &$X$    &Pol. \\    
    (GHz) &(MHz)     &(K)              &(K/Jy)       &(\arcsec) &(\arcsec) &     \\    
    \hline                        
     4.85 &500 &27  &1.5 &146  &485   &LCP, RCP \\     
    10.45 &300 &50  &1.3 &67   &182.4 &LCP, RCP \\
    \hline                                  
  \end{tabular}}
\par
  \medskip
  Column~1, is the central frequency while Col.~2 is the
    receiver bandwidth. Column~3, gives the system temperature and
    Col.~4 the sensitivity. Column~5, shows the full width at half
    maximum and Col.~6 the angular separation between the two
    beams. Finally, in Col.~7 we give the polarization channels
    available.
\end{table}