\begin{table}%tA.3
%\centering
\par
\caption{Evolution during the decay phase for the 27~April 1993 flare.}\label{t4}
%\centering
\par
\begin{tabular}{c c c c}
\hline\hline\noalign{\smallskip}
Time period  [UT] & $\zeta_{\rm obs}$ & $0.5 \frac{{\rm d}\!\lg L}{{\rm d}\!\lg N}$ & $\zeta_{\rm QSS}$ \\ \hline
\multicolumn{4}{c}{kernel A} \\
09:38--09:55 & $0.17$ & $-0.17$ & $0.33$ \\
10:00--11:20 & $0.03$ & $-0.23$ & $0.27$ \\
11:30--14:42 & $0.08$ & $-0.17$ & $0.33$ \\
\hline
\multicolumn{4}{c}{kernel B} \\
09:38--09:55 & $0.15$ & $-0.15$ & $0.35$ \\
10:00--11:20 & $0.00$ & $-0.28$ & $0.22$ \\
11:30--14:42 & $0.15$ & $-0.32$ & $0.18$ \\
%\hline
%\multicolumn{4}{c}{faza4} \\
%\hline
%15:13 - 04:00 & $0.09$ & $-0.18$ & $0.32$ \\
\hline
\end{tabular}
\end{table}