\begin{table}%t1
\caption{\label{obs}Journal of observations (ESO program ID 77.B-0039(A)).}            
%\centerline
{\small                         
\begin{tabular}{c c c c c c c}       
\hline\hline                
Observation        &    Frame &Exp. time (s) & Seeing\tablefootmark{a}    & Airmass$^{a}$  & Date              & UT$^{a}$  \\ 
\hline                     
LTT4816 Ph.St.  &           1       &35                      & 0.91$''$      &     1.484            & 2006 May 2 & 23:06\\
NGC4388 Inner &            1       &600                      & 0.9$''$      &     1.688            & 2006 May 2 & 23:45\\
NGC4388 Inner &            2       &600                      & 1.11$''$    &     1.616            & 2006 May 2 & 23:56\\
NGC4388 Inner &            3       &600                      & 1.10$''$    &     1.554            & 2006 May 3 & 00:07\\
NGC4388 Outer&            1       &1350                    &  0.89$''$   &     1.330            & 2006 May 3 & 01:11\\
NGC4388 Outer&            2       &1350                    &  0.83$''$   &     1.289            & 2006 May 3 & 01:34\\
NGC4388 Outer&            3       &1350                    &  0.96$''$   &     1.264            & 2006 May 3 & 01:58\\
NGC4388 Outer&            4       &1350                    &  0.67$''$   &     1.256            & 2006 May 3 & 02:21\\
NGC4388 Outer&            5       &1350                    &  0.61$''$   &     1.423            & 2006 May 3 & 04:10\\
NGC4388 Outer&            6       &1350                    &  0.55$''$   &     1.519            & 2006 May 3 & 04:33\\
NGC4388 Outer&            7       &1350                    &  0.55$''$   &     1.651            & 2006 May 3 & 04:57\\
LTT7987 Ph.St.  &           1       &40                          & 1.34$''$   &     1.010            & 2006 May 3 & 10:35\\
\hline                                   %inserts single line
\end{tabular}}
\tablefoot{\tablefoottext{a}{Seeing, airmass, and UT (Universal Time) refer to the beginning of each acquisition.}}
\end{table}