\begin{table}%t4
\caption{\label{table:4}Dereddened Str\"omgren photometric data. H \& M represents Hauck \& Mermilliod (\cite{hauc98}).}
%\centering
\small
\begin{tabular}{c c c c c}
\hline\hline
\multicolumn{4}{c}{Data for HD~51106:} & \\
\hline
  &$(b-y)_0$&$m_0$&$c_0$&H$\beta$\\
 H \& M  &0.119&0.245&0.914&2.820 (estimated)\\
 Gaudi &0.108&0.242&0.922&2.839\\
\hline 
\multicolumn{4}{c}{Data for HD~50747:} & \\
\hline
  &$(b-y)_0$&$m_0$&$c_0$&H$\beta$\\
 H \& M  &0.084&0.176&1.129&2.833\\
 Gaudi &0.084&0.176&1.135&2.815\\
\hline
\end{tabular}
\end{table}