\begin{table}%T1
%%\centering
\par
\caption{Log of the starting ($sp$) and ending ($ep$) pointings of the two GPSs in revolutions 25 and 26.}
\label{tab:details}
\begin{tabular}{c c c c}
\hline\hline
Exposure    &  Duration      & \multicolumn{2}{c}{Pointing coordinates (J2000)}\\
number          &  ({\rm s})    &   {\rm RA}       & {\rm Dec}                   \\
\hline
00250026 ($sp$)          & 2263       & $01\rm ^h$$41\rm ^m$$00.00\rm ^s$ & $+64^\circ$$28'$$58.8''$\\
00250036 ($ep$)   & 2200       & $19\rm ^h$$45\rm ^m$$00.00\rm ^s$ & $+37^\circ$$22'$$01.2''$\\
00260002 ($sp$)   & 4088       & $20\rm ^h$$07\rm ^m$$00.00\rm ^s$ & $+36^\circ$$22'$$01.2''$\\
00260011 ($ep$)   & 3781       & $01\rm ^h$$00\rm ^m$$00.00\rm ^s$ & $+58^\circ$$34'$$01.2''$\\
\hline
\end{tabular}
\end{table}