\begin{table}%t1
\caption{Photometric observing Log.}\label{tab1}
%\centering
\par
\begin{tabular}{ll}
     \hline \hline
Year & Nights of observation \\
\hline
1993 & July 22, 24, 25, 26, 27, 28, 29, 30 \\
1994 & May 13, 14, 15, 16, 17, 20, 21 \\
1995 & April 22, 23, 24, 25, 26 \\
1996 & May 8, 11, 14, 16, 20, 21, 22, 23 \\
1997 & August 2, 4, 5, 6, 9, 11, 12, 13, 14, 16, 17 \\
1998 & May 11, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25 \\
1999 & May 14, 15, 16, 17, 20, 22, 23 \\
2000 & May 21, 22, 23, 27, 28, 29, 30, 31, June 1 \\
2001 & May 17, 18, 21, 22, 23, 24, 25, 26 \\
2002 & June 9, 10, 11, 12, 13, 14, 15, 16, 17 \\
2003 & April 9, 20, 24, 25, 26, 28\\
 \hline
\end{tabular}
\end{table}