\begin{table}%t2
%\centering
\par
\caption{The standard HESS analysis results for GRS~1915+105.}
\label{grsresults}
\begin{tabular}{c c c c c c c c c c c c}
\hline\hline\\[-3.2mm]
Set    & $T_{\rm live}$ & $S$         & $N_{\rm ON}$ & $N_{\rm OFF}$ & $\alpha$ & $Z_{\rm mean}$ & $\psi_{\rm mean}$ & $E_{\rm th}$ & $I_{99.9\%}({>} E_{\rm th})$ & Crab & $P(\chi^2)$\\[0.3mm]
       & [h]            & [$\sigma$]  &              &               &          &[$^{\circ}$]    & [$^{\circ}$]      & [GeV]        & [$10^{-12}$~ph~cm$^{-2}$~s$^{-1}$] & \% &\\
\hline
All       & 24.07 & --0.3 & 1052 & 15790  & 0.067 & 38 & 1.22 & 410 & $<$0.61   & $<$0.7   & 0.53\\
I          & 8.56  & --0.8 & 508  & 6484   & 0.081 & 36 & 0.65 & 410 & $<$0.84   & $<$1.0   & 0.47\\
II         & 2.86  & 0 & 96   & 2751   & 0.035 & 43 & 1.83 & 500 & $<$2.22   & $<$3.4   & 0.37\\
III        & 3.52  & 0.3  & 102  & 1926   & 0.051 & 44 & 1.11 & 540 & $<$1.90   & $<$3.3   & 0.13\\
IV       & 8.68  & 0.5  & 337  & 4204   & 0.078 & 36 & 0.70 & 400 & $<$1.58   & $<$1.8   & 0.62\\
Plateau  & 15.54 & 0  & 746 & 9771 & 0.076 & 36 & 0.70 & 410 & $<$0.98   & $<$1.1   & 0.67\\
Post-flare & 1.70 & --0.9   & 99  & 917  & 0.118 & 35 & 0.50 & 400 & $<$1.34   & $<$1.5   & --\\
\hline
\end{tabular}
\end{table}