\begin{table}
\renewcommand{\thetable}{\arabic{table}b}
%\centering
\par
\caption{MSX data.}\label{t3b}
\begin{tabular}{c|cccc} \hline\hline
     & \multicolumn{4}{c}{MSX fluxes (Jansky)}\\ \cline{2-5}
IRAS & Band A & Band C & Band D & Band E \\ 
     & 8.28~$\mu$ & 12.13~$\mu$ & 14.65~$\mu$ & 21.34~$\mu$ \\  \hline
17460--3114 & 4.0095 & 5.2726 & 6.9896 & 20.730 \\
\hline
\end{tabular}
\end{table}