\begin{table}%t3
\caption{Radii of NGC~6397 from RDPs and 2MASS SBPs.}
\label{tab3}
%\tiny
\small%\centerline
{\begin{tabular}{cccccccc}
\hline\hline
&\multicolumn{3}{c}{RDP}&&\multicolumn{3}{c}{SBP (\jj\ band)}\\
\cline{2-4}\cline{6-8}
$\Delta_{J15}$&\rc&\rhSC&\rt&&\rc&\rhL&\rt \\
(mag)&(\arcmin)&(\arcmin)&(\arcmin)&&(\arcmin)&(\arcmin)&(\arcmin)\\
(1)&(2)&(3)&(4)&&(5)&(6)&(7)\\
\hline
$-2.0$&$1.3\pm0.1$&$3.8\pm0.1$&$33\pm5$&&$1.2\pm0.3$&$3.4\pm0.1$&$28\pm5$ \\
$-1.5$&$1.3\pm0.1$&$4.0\pm0.2$&$39\pm8$&&$1.2\pm0.3$&$3.4\pm0.1$&$30\pm5$ \\
$-1.0$&$1.3\pm0.1$&$4.0\pm0.2$&$42\pm8$&&$1.2\pm0.3$&$3.4\pm0.1$&$26\pm5$ \\
$-0.5$&$1.4\pm0.1$&$3.9\pm0.2$&$44\pm7$&&$1.2\pm0.3$&$3.4\pm0.1$&$27\pm8$ \\
$~0.0$&$1.7\pm0.1$&$4.0\pm0.1$&$41\pm4$&&$1.2\pm0.3$&$3.4\pm0.1$&$27\pm6$ \\
$+0.5$&$2.3\pm0.1$&$4.4\pm0.1$&$40\pm4$&&$1.4\pm0.4$&$3.4\pm0.1$&$28\pm8$ \\
$+1.0$&$2.9\pm0.1$&$4.9\pm0.1$&$48\pm3$&&$1.4\pm0.3$&$3.5\pm0.1$&$32\pm2$ \\
\hline
\end{tabular}}\medskip
{Notes.}
  Core and tidal radii were derived from fits of \citet{King62} functions (Sect.~\ref{Struc})
to the respective profiles. The half-star counts and half-light radii were measured
directly on the profiles.
\end{table}