\begin{table}%t1
%\centering
\par
\caption{\label{gcde} {Overview of the Galactic Centre Deep Exposure (GCDE) observations, giving the date, revolution numbers, time in {\it INTEGRAL} Julian Date and on source effective exposure, $t_{\rm eff}$.  IGR~J17285--2922 was detected in revolutions 118--121 in Group~C only.  {\it INTEGRAL} Julian Date (IJD) = MJD~--~51~544.}}
\begin{tabular}{l l l l l}
\hline 
\hline GCDE & Obs. date & Rev. & IJD & $t_{\rm eff}$ (ks)\\
\hline
A & 27/02/03--04/05/03 & 46--67   & 1153.9--1219.6 & 471\\
B & 08/08/03--20/08/03 & 100--1,103  & 1315.4--1327.3 & 96\\
C & 25/09/03--19/10/03 & 116--123  & 1363.3--1387.1 & 191\\
D & 12/02/04--24/04/04 & 163--186  & 1503.9--1575.6 & 550\\
\hline
\end{tabular}
\end{table}