Table 3: Adopted atmospheric parameters and derived Iron abundances for observed stars in NGC 2506, NGC 6134, and IC 4651; n indicated the number of lines retained in the analysis. In the last column we give for comparison the value of gravity derived from photometric information.
Star $T_{\rm eff}$ $\log$ g [A/H] vt n [Fe/H]I rms n [Fe/H]II rms $\log ~g$
  (K) (dex) (dex) (km s-1)             (phot.)
NGC 2506
459 4450 1.06 -0.37 1.36 137 -0.37 0.16 10 -0.37 0.17 1.74
438 5030 2.53 -0.19 1.17 109 -0.18 0.11 13 -0.18 0.15 2.68
443 4980 2.32 -0.21 1.20 102 -0.21 0.12 13 -0.21 0.09 2.60
456 4970 2.54 -0.21 1.17 83 -0.21 0.19 10 -0.21 0.14 2.95
NGC 6134
404 4940 2.74 +0.11 1.14 128 +0.11 0.16 12 +0.11 0.12 2.60
929 4980 2.52 +0.24 1.17 117 +0.24 0.16 11 +0.24 0.19 2.67
875 5050 2.92 +0.16 1.12 126 +0.16 0.14 13 +0.16 0.15 2.73
428 5000 3.10 +0.22 1.10 82 +0.22 0.16 9 +0.23 0.14 2.76
421 4950 2.83 +0.11 1.13 81 +0.11 0.12 9 +0.11 0.13 2.68
527 5000 2.98 +0.05 1.11 83 +0.05 0.11 8 +0.05 0.12 2.71
IC 4651
27 4610 2.52 +0.10 1.17 128 +0.10 0.15 10 +0.10 0.17 2.51
76 4620 2.26 +0.11 1.21 129 +0.10 0.17 11 +0.10 0.17 2.51
72 4500 2.23 +0.13 1.21 120 +0.13 0.13 9 +0.13 0.21 2.25
56 3950 0.29 -0.34 1.46 89 -0.34 0.17 6 -0.35 0.15 1.23
146 4730 2.14 +0.10 1.21 125 +0.11 0.16 11 +0.11 0.16 2.59


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