\begin{table}%t1
\caption {\label{tab:ulJulyAugust}Derived upper limits on flux for the July and the August 2007
data. }
%\centerline
 {\begin{tabular}{cccccc}
\hline\hline
$\langle E\rangle$ & \multicolumn{5}{c}{\textbf{U.L. July 17-20 2007}}\\
\textbf{[GeV]} & $N_{\rm ON}$ &$N_{\rm OFF}$& Sign. ($\sigma$) & C.U.  & [erg cm$^{-2}$ s $^{-1}$]\\
\hline
 83 & 54~188 & 54~705 & --1.56 &0.04 & $0.78\times 10^{-11}$\\
 186 & 976 & 965 & 0.25 & 0.05 & $0.62\times 10^{-11}$\\
 476 & 62 & 52.3 & 0.91 & 0.03 & $0.169\times 10^{-11}$\\
\hline
$\langle E\rangle$ & \multicolumn{5}{c}{\textbf{U.L. August 9--22 2007}}\\
\textbf{[GeV]} & $N_{\rm ON}$ &$N_{\rm OFF}$& Sign. ($\sigma$) & C.U.  & [erg~cm$^{-2}$ s $^{-1}$]\\
\hline
128 & 5453 & 5539.7 & --0.82 & 0.14 & $2.0\times 10^{-11}$\\
186 & 3892 & 3885.1 & 0.078 & 0.03 & $0.3\times 10^{-11}$\\
476 & 202 & 220.8 & --0.91 & 0.01 & $0.09\times 10^{-11}$ \\
\hline
\end{tabular}}
\par
\smallskip
The columns represent respectively: the average true energy, the
number of ON source events, number of background (OFF) events, the
significance, the flux upper limit in Crab Units (C.U.) and in
absolute flux units of [erg~cm$^{-2}$~s$^{-1}$].
\par
\end{table}