\begin{table}%t3
\par
 \caption {\label{tab:g2}Values of $\langle g^{(2)}(d) \rangle$ obtained from one
hour observation of the bright star $\zeta$~Ori, for each pair $a,b$
of sub-apertures, assuming a time coincidence window $\Delta t = 244.1$~ps.}
  %\centering
\par
 \begin{tabular}{c c c c c c}
\hline\hline
Channel pair & Effective distance & Resolving angle & $\langle g^{(2)}(d) \rangle$ & Standard \\
(channel numbers) & $d$ (m) & $\theta$ (arcsec) & & deviation \\
\hline
A-B & 1.7 & 0.052 & 0.886 & 0.002 \\
A-C & 2.4 & 0.037 & 0.912 & 0.003 \\
A-D & 1.7 & 0.052 & 0.931 & 0.001 \\
B-C & 1.7 & 0.052 & 0.909 & 0.002 \\
B-D & 2.4 & 0.037 & 0.909 & 0.004 \\
C-D & 1.7 & 0.052 & 0.932 & 0.004 \\
\hline
\end{tabular}
\end{table}