Table 3: Radii of NGC 6397 from RDPs and 2MASS SBPs.
  RDP   SBP (J band)
$\Delta _{J15}$ $R_{\rm c}$ $R_{\rm hSC}$ $R_{\rm t}$   $R_{\rm c}$ $R_{\rm hL}$ $R_{\rm t}$
(mag) ($^\prime$) ($^\prime$) ($^\prime$)   ($^\prime$) ($^\prime$) ($^\prime$)
(1) (2) (3) (4)   (5) (6) (7)
-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 $2.9\pm0.1$ $4.9\pm0.1$ $48\pm3$   $1.4\pm0.3$ $3.5\pm0.1$ $32\pm2$
Notes. Core and tidal radii were derived from fits of King (1962) functions (Sect. 3) to the respective profiles. The half-star counts and half-light radii were measured directly on the profiles.

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