\begin{table}%t3
\caption{Summary of power-law fit parameters ($k_1=\alpha_\phi \phi^{-\beta_\phi}$, $k_1=\alpha_R
R^{-\beta_R}$) for $\Delta \phi=20^{\circ}$-bin sampling.}\label{t3}
%\centering
\par
\begin{tabular}{lccc}
     \hline
     \hline
   &   n4v3   & n4v5  & n4vm \\
     \hline
 $\alpha_\phi$    &  $0.22\pm 0.03$  & $0.09\pm 0.03$  &  $0.17\pm 0.03$   \\
 $\beta_\phi$     &  $0.50\pm 0.04$  & $0.36\pm 0.07$  &  $0.69\pm 0.09$   \\
 $\alpha_R$    &  $2.61\pm 2.55$  &  $0.52\pm 0.57$ &  $8.4\pm 2.76$   \\
 $\beta_R$     &  $2.08\pm 0.45$  &  $1.49\pm 0.49$ &  $3.1\pm 0.33$   \\
     \hline
\end{tabular}
\end{table}