\begin{table}%tT.2
%\centering
\par
\caption{Magnitude zero points employed in computing the
  equivalent magnitude corresponding to a number of photons per square meter
  and per second equal to~$N_{\rm ph}$.\label{tab:zeropoint}}
\begin{tabular}{ccc}
\hline\hline
Band & $\lambda_0~\rm (\mu m)$ & $Z_{\rm BAND}$  \\\hline
$R $& 0.64 & 7.6408\\
$K$ & 2.20 & 9.4367\\\hline
\end{tabular}
\end{table}