\begin{table}%t1
\caption{Characteristics of the selected images from 1996 to 2001. The MDI day (first column), date
(second column), and UT time are given for the magnetograms ($t_{\rm mag}$, third column) and their
corresponding averaged intensities ($t_{\rm int}$, fourth column).} \label{table1} 
%\centerline
{\small\begin{tabular}{llll|llll} 
\hline 
\hline 
MDI day & Date & \multicolumn{1}{c}{$t_{\rm mag}$} & \multicolumn{1}{c}{$t_{\rm  int}$} & MDI
day & Date & \multicolumn{1}{c}{$t_{\rm mag}$} & \multicolumn{1}{c}{$t_{\rm  int}$} \\ 
& & (UT) & (UT) & & & (UT) & (UT)\\ 
\hline 
1237 & 22/05/96 & 00:00 & 00:32 & 2225 & 04/02/99 & 03:11 & 03:11 \\ 
1239 & 24/05/96 & 00:04*& 01:18 & 2227 & 06/02/99 & 04:47 & 04:47 \\
1249 & 03/06/96 & 12:48 & 12:44 & 2229 & 08/02/99 & 14:23 & 14:23 \\ 
1296 & 20/07/96 & 22:28*& 22:28 & 2292 & 12/04/99 & 11:12 & 10:31 \\ 
1299 & 23/07/96 & 01:40*& 01:40 & 2380 & 09/07/99 & 17:35 & 17:32 \\ 
1313 & 06/08/96 & 16:00 & 16:02 &  2413 & 11/08/99 & 09:35 & 09:35 \\ 
1389 & 21/10/96 & 19:11 & 19:12 &  2514 & 20/11/99 & 04:48 & 04:22 \\ 
1407 & 08/11/96 & 19:12 & 18:56 &  2528 & 04/12/99 & 11:11 & 11:11 \\ 
1416 & 17/11/96 & 11:15*& 11:14 & 2529 & 05/12/99 & 11:11 & 11:11 \\ 
1420 & 21/11/96 & 01:39*& 01:27  & 2530 & 06/12/99 & 09:35 & 09:35 \\ 
1502 & 11/02/97 & 06:27*& 06:26 & 2583 & 28/01/00 & 17:35 & 17:27 \\ 
1509 & 18/02/97 & 14:27*& 14:26 & 2594 & 08/02/00 & 21:32 & 21:33 \\ 
1529 & 10/03/97 & 17:36 & 17:19  & 2652 & 06/04/00 & 17:35 & 17:12 \\ 
1538 & 19/03/97 & 00:00 & 00:08 & 2684 & 08/05/00 & 20:47 & 20:47 \\ 
1572 & 22/04/97 & 11:16*& 11:16 & 2693 & 17/05/00 & 20:48 & 21:01 \\ 
1614 & 03/06/97 & 11:16*& 11:16 & 2750 & 13/07/00 & 22:24 & 22:41 \\ 
1701 & 29/08/97 & 03:15*& 03:14 & 2751 & 14/07/00 & 00:00 & 00:01 \\ 
1717 & 14/09/97 & 16:00 & 16:02 & 2804 & 05/09/00 & 19:11 & 19:11 \\ 
1754 & 21/10/97 & 06:23 & 06:20 & 2860 & 31/10/00 & 17:35 & 17:43 \\ 
1804 & 10/12/97 & 14:23 & 14:23 & 2890 & 30/11/00 & 21:47 & 21:44 \\ 
1882 & 26/02/98 & 18:37 & 18:34 & 2973 & 21/02/01 & 19:11 & 18:56 \\ 
1889 & 05/03/98 & 01:39*& 02:02 & 3036 & 25/04/01 & 19:12 & 18:44 \\ 
1944 & 29/04/98 & 12:47 & 12:47 & 3099 & 27/06/01 & 16:00 & 16:06 \\ 
1963 & 18/05/98 & 11:11 & 11:11 & 3101 & 29/06/01 & 20:56 & 20:20 \\ 
1968 & 23/05/98 & 06:23 & 06:23 & 3189 & 25/09/01 & 17:39*& 18:01 \\ 
1983 & 07/06/98 & 03:15*& 02:30 & 3231 & 06/11/01 & 17:35 & 17:35 \\ 
2000 & 24/06/98 & 11:11 & 11:11 & 3234 & 09/11/01 & 20:47 & 20:53 \\ 
2130 & 01/11/98 & 11:11 & 11:11 & 3237 & 12/11/01 & 22:26 & 22:33 \\ 
2131 & 02/11/98 & 06:23 & 06:23 & 3239 & 14/11/01 & 04:51*& 05:30 \\ 
2132 & 03/11/98 & 06:23 & 06:23 & 3252 & 27/11/01 & 20:47 & 20:47 \\ 
\hline 
\end{tabular}}\small
\par
\medskip
\hspace*{37mm}* Indicates 5-min averaged magnetograms.
\end{table}