\begin{table}%t2
\caption{\label{tab:lines}Measured fluxes.}
%\centering
\par
\begin{tabular}{lccc}
\hline
\hline
  Line             &  mm\tablefootmark{a} &  B1\tablefootmark{b} &  
  B2\tablefootmark{c} \\
               & K \kms & K \kms & K \kms \\
\hline
 $4_{0,4}$--$3_{0,3}$  &  0.19      & 0.71         &  1.24    \\
$5_{0,5}$--$4_{0,4}$  &  0.19      & 0.84         & 1.38    \\
$6_{0,6}$--$5_{0,5}$  &  0.073      & $< 0.25$ & $< 0.20$  \\
\hline
\end{tabular}
\tablefoot{ Computed in the velocity range from:
\tablefoottext{a} 1.1 to 3.7 km~s$^{-1}$; \tablefoottext{b}  $-4.8$ to 5.0 km~s$^{-1}$; 
\tablefoottext{c}$-2.6$ to 6.1 km~s$^{-1}$.}
\end{table}