Table 4: Distances and ages for globular clusters.
Parameter NGC 6397 NGC 6752 47 Tuc
[Fe/H] $-2.03\pm 0.05$ $-1.43\pm 0.04$ $-0.66\pm 0.04$
$[\alpha$/Fe] $~0.34\pm 0.02$ $~0.29\pm 0.02$ $~0.30\pm 0.02$
[ M/H] $-1.79\pm 0.04$ $-1.22\pm 0.04$ $-0.45\pm 0.04$
(m-M)V(B-V) $12.57\pm 0.03$ $13.38\pm 0.03$ $13.47\pm 0.03$
(m-M)V(b-y) $12.62\pm 0.03$ $13.14\pm 0.03$ $13.57\pm 0.03$
<(m-M)V> $12.60\pm 0.08$ $13.26\pm 0.08$ $13.52\pm 0.08$
bin. corrected $12.58\pm 0.08$ $13.24\pm 0.08$ $13.50\pm 0.08$
V(TO) $16.56\pm 0.02$ $17.39\pm 0.03$ $17.68\pm 0.05$
V(HB) $13.11\pm 0.10$ $13.84\pm 0.10$ $14.13\pm 0.10$
MV(TO) $3.98\pm 0.08$ $4.15\pm 0.08$ $4.18\pm 0.08$
MV(HB) $0.53\pm 0.13$ $0.60\pm 0.13$ $0.63\pm 0.13$
Age (no diff.) (Gyr) $13.9\pm 1.1$ $13.8\pm 1.1$ $11.2\pm 1.1$
Age (diff.) (Gyr) $13.5\pm 1.1$ $13.4\pm 1.1$ $10.8\pm 1.1$


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