\begin{table}%T1
%\centering
\par
\caption{Basic characteristics of the studied events and of their
slowly drifting structures (DS) in the 0.4$-$2.0~GHz frequency range
and hard X-ray source motions.} \label{t1}
\begin{tabular}{cccc}
 \hline\hline
 Event & Apr. 4, 2002 & May~17, 2002 & Aug. 30, 2002  \\
 \hline
 GOES start (UT) & 15:24 & 7:27 & 12:47 \\
 GOES maximum (UT) & 15:32 & 7:54 & 13:29 \\
 GOES end (UT) & 15:38 & 8:40 & 13:35 \\
 GOES class & M 6.1 & M 1.5 & X 1.5 \\
 H$\alpha$ start (UT) & -- & -- & 12:26 \\
 H$\alpha$ maximum (UT) & -- & -- & 13:28 \\
 H$\alpha$ end   (UT) & -- & -- & 13:49 \\
 H$\alpha$ class & -- & -- & SN \\
 NOAA active region & -- & -- & 0095 \\
 Location & source above limb & source above limb & N15 E74 \\
 \hline
 Drifting structure &   & &  \\
 \hline
 Start (UT) & 15:28:48 & 7:37 & 13:27:38 \\
            &          & 7:32 (start of 3~GHz burst)     &          \\
 End (UT)& 15:29:20 & 7:57 & 13:27:50   \\
 Frequency range (GHz) & 0.45$-$1.4 & 0.8$-$1.8 & 0.8$-$2.0 \\
 Global Freq. drift & $-32$ & $-0.4$ & $-25$ \\
 (MHz s$^{-1}$)& & &   \\
 Drift of individual pulses & infinite & 240$-$360 & infinite \\
 (MHz s$^{-1}$)& & &   \\
 Instantaneous & 200 & 800 & 800   \\
 bandwidth (MHz) &  &  &    \\
 \hline
 X-ray source motion & & & \\
 \hline
Start (UT) & 15:28 & 7:32 & 13:28 \\
End (UT)   & $>$15:38 & 7:36  & $>$13:33 \\
Velocity direction & east  & source splitting & north-east \\
(km~s$^{-1}$) & 12 & up to 100 (during the splitting) & 10 \\
 \hline
\end{tabular}
\end{table}