\begin{table}%t1
%\centering
\par
\caption{Observational log.}             % title of Table
\label{table:1}      % is used to refer this table in the text
%\centering
                          % used for centering table
\begin{tabular}{c c c c c}        % centered columns (4 columns)
\hline\hline                 % inserts double horizontal lines
RA (J2000) & Dec (J2000) & Filter & Exp. time (s) & {\it FWHM} $('')$ \\    % table heading
\hline                        % inserts single horizontal line
   $00^{\rm h} 38^{\rm m} 52^{\rm s}$ & $48\degr 20\arcmin 18\arcsec$ & $J$     & $8\times30$ & 0.65 \\      % inserting body of the table
            &          & $H$     & $8\times30$ & 0.64 \\
            &          & $K'$ & $8\times30$ & 0.64 \\
\hline                                   %inserts single line
\end{tabular}
\end{table}