\begin{table}%t1
\caption{MCAL GRB detection summary.}             % title of Table
\label{table:1}
\small
%\centerline
{                         % used for centering table
\begin{tabular}{l r}        
\hline\hline                 % inserts double horizontal lines
MCAL detection & Number of events \\    % table heading 
\hline                        % inserts single horizontal line
 Ground trigger$^a$ & 28 \\      
 On-board trigger$^b$ & 23 \\
 Localized by SuperAGILE  &  1 \\
 Localized by Swift       & 10 \\
 Localized by IPN$^c$        &  5 \\
\hline                                   
\end{tabular}}
\smallskip
$^a$ Scientific ratemeters only: 22nd Jun. 2007--24th Nov. 2007, 1st Jan. 2008--4th Feb. 2008.
\\
$^b$ 25th Nov. 2007--31st Dec. 2007, 5th Feb. 2008--30th Jun. 2008.
\\
$^c$ Public coordinates available in GCN.
\end{table}