\begin{table}%t1
\caption{Results of the spectral analysis on the CXB for the MOS~cameras. The normalization is expressed in photons~cm$^{-2}$~s$^{-1}$~sr$^{-1}$~keV$^{-1}$ at~3~keV (not corrected for the stray light contribution). The quoted uncertainties are purely statistical errors at the 90\% confidence 
level for a single interesting parameter.}\label{tabresults}
%%\centering
\par
\begin{tabular}{cccc} 
\hline \hline
Instrument & Photon index &   Normalization & $\chi^{2}_{\nu}$/d.o.f.  \\ 
\hline
MOS1   & 1.43 $\pm$ 0.07 & 2.62 $\pm$ 0.05 & 1.16/35  \\ \hline
MOS2      & 1.38 $\pm$ 0.07 & 2.68 $\pm$ 0.05  &  1.17/35   \\  \hline
MOS1+MOS2      & 1.41 $\pm$ 0.04 & 2.647 $\pm$ 0.038 & 1.15/72 \\ \hline 
\end{tabular}
\end{table}