\begin{table}%t1
%\centering
\par
\caption{Analysed LDAFs -- data from \textit{GOES}/SEM database.}\label{t1}
%\centering
\par
\begin{tabular}{c c c c}
\hline\hline
Date & Beginning & Duration  & X-ray \\
     & [UT]     & [h]   & class \\ \hline
7 May 1993 & 20:20 & 7 & M1.6 \\
14 May 1993 & 21:54 & 10 & M4.5 \\
27 Apr. 1998 & 08:55 & 19 & X1.0 \\
\hline
\end{tabular}
\end{table}