\begin{table}%t4
%\centering
\par
\caption{Differential number counts best-fit parameters.}
\begin{tabular}{@{}lccccc@{}}
\hline\noalign{\smallskip}
Sample & $N$                & $\gamma_1$      & $S_b$/10$^{-14}$         & $\gamma_2$ & $\chi^2$ \\
       & [deg$^{-2}$]     &                 & [erg cm$^{-2}$ s$^{-1}$] &            &           \\
\hline
Total  & 167.9 $\pm$ 15.6 & 2.64 $\pm$ 0.03 & 0.99 $\pm$ 0.15   & 1.24 $\pm$ 0.06 & 1.35 \\
AGN1   & 122.2 $\pm$ 15.0 & 2.67 $\pm$ 0.03 & 1.39 $\pm$ 0.22   & 0.97 $\pm$ 0.08 & 1.36 \\
AGN2   &  35.6 $\pm$ 3.5  & 2.62 $\pm$ 0.04 & 0.33 $\pm$ 0.06   & 0.82 $\pm$ 0.15 & 1.36 \\
\hline
\end{tabular}\label{tab:nsfit}
\end{table}