\begin{table}%t1 
\par
\caption {\label{tab-log}\swf~ observation journal and exposures of \mrk.}
 %%\centerline

 {\small
\begin{tabular}{llllll}
\hline\hline
\noalign{\smallskip}
 ObsId      &Date     &Start UT   &\xrt~ Exp &\uvt~ Exp &\bat~ Exp\\
            &mm-dd-yy   &(s)        &(s)        &(s)     &(s)      \\ 
\hline
00206476000(*)  &04/22/06 (*) &04:21 AM  &10~329   &10~337  &15~156\\
00030352005     &04/25/06  &06:22 AM  &4885    &1214   &4927\\
00030352006     &04/26/06  &03:29 AM  &3526    &878    &3567\\
00030352007     &04/26/06  &10:48 PM  &1328    &329   &1343 \\
00030352008     &06/14/06  &12:21 AM  &3187    &788   &3318 \\
00030352009     &06/15/06  &11:42 AM  &5427    &1336  &2787 \\
00030352010     &06/16/06  &12:33 AM  &23~327    &5868   &23~693 \\
00030352011     &06/18/06  &12:52 AM  &33~288   &32~468     &33~671 \\
00030352012     &06/20/06  &11:59 PM  &15~009   &0         &15~379 \\
00030352013     &06/22/06  &01:08 AM  &20~213    &20~430     &0     \\
00030352014     &06/23/06  &09:25 AM  &7916    &0         &7221  \\
00215769000(*)  &06/23/06(*)   &03:44 PM  &1109    &1049   &5207 \\
00030352015     &06/24/06  &01:37 AM  &12~944      &0         &13~191 \\
00030352016     &06/27/06  &03:17 AM  &3046    &0         &3080 \\
00219237000(*)  &07/15/06(*)  &04:54 AM  &1916    &1915   &6224 \\
\hline
\noalign{\smallskip} 
\end{tabular}
}
\par
\smallskip
(*) Pointings triggered by the BAT instrument as GRBs.
\end{table}