\begin{table}%t2
\caption{\label{Tab_stepwise}Stepwise determination of the UV LF at $z \sim 6.8$.}
\par
%\centering
\small
\begin{tabular}{cc}
\hline\hline\noalign{\smallskip}
$M_{1500}$ & $\phi~(10^{-4}~{\rm Mpc^{-3}~mag^{-1}})$\\
\hline\noalign{\smallskip}
--22.0& $\rm 0.02 ^{+0.33} _{-0.02}$\\
--21.0& $\rm 0.19 ^{+0.47} _{-0.19}$\\
--20.0& $\rm 2.20 ^{+1.47} _{-1.47}$ \\[2pt]
\hline
\end{tabular}
\end{table}