\begin{table}%t1
%\centering
\par
 \caption{\label{photo}Journal of photometric observations in the field of NGC~6863.} 
  \begin{tabular}{cccc} 
   \hline \hline \noalign{\smallskip}
    \multicolumn{1}{c}{Field}    & 
    \multicolumn{1}{c}{Filter}    & 
    \multicolumn{1}{c}{Time integration}& 
    \multicolumn{1}{c}{Seeing}         \\ 
               &     &  (s)        & ($^{\prime\prime}$)\\ 
    \hline 
     NGC~6863  
               & $U$ &  15, 300      &  1.8 \\ 
               & $B$ &  2, 5, 90     &  1.9 \\ 
               & $V$ &  1, 3, 30, 30 &  1.7 \\ 
               & $I$ &  1, 5, 30     &  1.6 \\ 
    \hline 
  \end{tabular} 
  \end{table}