\begin{table}%t2
      \caption{\label{t2}Associated metric type~II bursts. $t_{\rm b}$ is the starting time of the type~II burst, $f_{\rm b}$ the 
starting frequency (in~MHz), $r_{\rm b}$ the inferred starting height above the solar 
surface (in Mm), $v_{\rm b}$ and $\bar v$ the initial and the average speed, respectively (in km~s$^{-1}$), $\bar a$ the average 
deceleration (in m~s$^{-2}$), and {\it BDW}$_0$ and $\overline{\it BDW}$ are the initial and the average bandsplit, respectively. Values in brackets are ambiguous, and a blank space indicates that the parameter could not be measured at all.}
         %\centering
\par
\begin{tabular}{lcccccccc}
	\hline
	\hline
            \noalign{\smallskip}
{Event} & {$t_{\rm b}$} & {$f_{\rm b}$} & {$r_{\rm b}$} & {$v_{\rm b}$} & {$\bar v$} & {$\bar a$} & {${\it BDW}_0$} & {$\overline{BDW}$}\\
	\noalign{\smallskip}
            \hline
            \noalign{\smallskip}
E1 &	02:47:50	& (73)&(369)	&(1200)& &	&(0.3) 	&
\\	
E2 & 04:38:06		&85&	323	&	1009	& 769 &	$-$2634	&	
0.53 & 0.49	\\	
E3 & 09:08:50		&143&	179	&	1535	& 1038 &	$-$1113	&	
0.51 & 0.46	\\	
E4 &06:01:12		&105&	252	&	1686	& 1208 &	$-$3015	&	
0.60 & 0.40	\\	
E5 &13:40:50		&(166)&	(143)	&	(530)	& (277) &	($-$812)	&	
&	\\	
E6 &	03:17:00	&192&	114	&	2629	& 1127 &	$-$3593	& &	
\\	
E7 &	22:16:00	&244&77	& & &	&0.43	&
\\
E8 &	21:45:00	&100&258	&530	& &	& &
\\
E9 &	22:03:00	&(75)&(397)	& &	&	&(0.33) &	
\\	
E10 &13:41:00	&(29)&	(793)	&	(1655)	& (1637) &	($-$6216)	&	(0.30)	& (0.31)
\\	
E11 &	02:13:06	&259      &	66	&	1649	& 1366 &	$-$2592	& 
&	\\	
E12 &	(18:39:00)	& &	&	& & &	&\\
	\noalign{\smallskip}
            \hline
            \noalign{\smallskip}
Mean: &  &161&181 & 1506 & 1101 & $-$2589& 0.52 & 0.45\\
$\sigma$: & & 71 & 100 & 709& 222 & 918 &0.07 & 0.04\\
 \hline
\end{tabular}
\end{table}