\begin{table}%t4
\par
\caption{Summary of REM observations.}%\centering
\small
\label{tab1}
\begin{tabular}{lcrr}
\hline\hline
 Date     & Start UT & Filter  & magnitude  \\
\par
\hline
11 May   & 21:41 & $R$  & 12.73 (0.04)  \\
11 May   & 21:45 & $I$  & 12.04 (0.07)  \\
11 May   & 21:50 & $V$  & 13.28 (0.08)  \\
17 May   & 21:43 & $H$  & 9.74 (0.04)  \\
18 May   & 09:41 & $R$  & 12.56 (0.05)  \\
18 May   & 09:46 & $I$  & 11.84 (0.05)  \\
18 May   & 09:51 & $V$  & 13.08 (0.07)  \\
19 May   & 09:12 & $R$  & 12.22 (0.07)  \\
19 May   & 09:17 & $I$  & 11.58 (0.07)   \\
19 May   & 09:22 & $V$  & 12.72 (0.07)  \\
19 May   & 21:12 & $H$  & 9.94 (0.03)  \\
\hline 
\end{tabular} 
\label{tab.REM}
\end{table}