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Table 3

Parameter metallicity obtained for the clusters investigated with the cross-entropy method.

This work
Cluster [Fe/H] Literature code TEC code [Fe/H] Ref.

NGC 2477 0.07 ± 0.03 R01 SPEC –0.10 ± 0.12 152
–0.03± 0.07 R03 PHOT
–0.008 R07 PHOT
–0.13± 0.18 R08 PHOT
–0.34± 0.07 R09 PHOT
–0.05± 0.11 R10 SPEC
0.04± 0.01 R11 SPEC
0.019± 0.115 R12 SPEC
0.05 R13 PHOT
0.07± 0.03 R28 SPEC
NGC 7044 -0.16 ± 0.09 R14 SPEC 0.04 ± 0.10 62
0.0 ± 0.2 R27 PHOT
0.01 R13 PHOT
0.01± 0.10 R03 PHOT
NGC 2266 –0.26 ± 0.02 R02 PHOT –0.32 ± 0.14 41
–0.26 ± 0.2 R03 PHOT
–0.38 ± 0.06 R15 SPEC
Berkeley 32 -0.29 ± 0.04 R01 SPEC –0.38 ± 0.11 40
–0.42 ± 0.09 R03 PHOT
–0.37 ± 0.05 R16 PHOT
–0.3 ± 0.02 R17 SPEC
–0.37 ± 0.04 R18 PHOT
–0.55 R13 PHOT
NGC 2682 0.03 ± 0.02 R04 SPEC 0.0 ± 0.18 335
–0.029 R07 PHOT 0.04 ± 0.10 31
–0.04± 0.03 R03 PHOT 0.04 ± 0.10 54
–0.05 ± 0.03 R19 PHOT
–0.06 ± 0.07 R20 PHOT
–0.05 ± 0.04 R18 PHOT
–0.01 ± 0.11 R21 PHOT
0.000 ± 0.092 R12 PHOT
–0.11 R13 PHOT
–0.09 ± 0.07 R10 SPEC
–0.01 ± 0.05 R06 SPEC
NGC 2506 –0.2 ± 0.02 R05 SPEC –0.13 ± 0.16 284
–0.51 ± 0.1 R03 PHOT –0.13 ± 0.16 163
–0.19 ± 0.06 R22 SPEC
–0.24 ± 0.05 R23 SPEC
–0.44 ± 0.06 R24 SPEC
–0.58 ± 0.14 R08 PHOT
–0.52 ± 0.07 R10 SPEC
–0.57 R25 PHOT
–0.48 ± 0.08 R21 PHOT
–0.58 R13 PHOT
–0.368 ±0.108 R12 PHOT
NGC 2355 –0.08 ± 0.08 R06 SPEC –0.32 ± 0.14 217
0.02±0.2 R03 PHOT –0.23 ± 0.24 44
0.13 R26 PHOT
Melotte 105 0.0 R13 PHOT –0.05 ± 0.15 289
0.0 ± 0.1 R03 PHOT 0.00 ± 0.21 32
Trumpler 1 –0.71 R13 PHOT 0.10 ± 0.13 320
–0.71 ± 0.1 R03 PHOT 0.15 ± 0.10 86

Notes. In the first column we list the cluster identification, the second column shows the metallicities obtained from the literature for the investigated clusters, and the third column presents the literature codes. In the column TEC we give the technique of data acquisition used for [Fe/H] determination, named SPEC for spectroscopy and PHOT for photometry. The last two columns present the metallicity values obtained in this work and the reference code for the data used from the WEBDA catalog. See the text for error estimates details. The TEC codes are R01, R04, R17, R22, and R28 used the data from high-resolution spectroscopy; R03 used unweighted averaged [Fe/H] values from the literature; R05, R06, R10, R11, R12, R14, R15, R23 and R24 used the data from high-, moderate- or low-resolution spectroscopy; R07, R09, R16, R18, R19, R20, R25, R26 and R27 used values from color-magnitude isochrone fits; R02, R08 and R16 used values from Washington photometry; R13 used UV excesses techniques (δ(U − B)0.6); R12, R19 and R20 used values from DDO photometry, and R21 used recalibrated values from Piatti et al. (1995). Literature code: R01 = Sestito et al. (2006); R02 = Kaluzny & Mazur (1991b); R03 = Pöhnl & Paunzen (2010); R04 = Randich et al. (2006); R05 = Carretta et al. (2004); R06 = Jacobson et al. (2011); R07 = Cameron (1985); R08 = Geisler et al. (1992); R09 = Jeffery et al. (2011); R10 = Friel & Janes (1993); R11 = Smith & Hesser (1983); R12 = Twarog et al. (1997); R13 = Tadross (2003); R14 = Warren & Cole (2009); R15 = Carrera (2012); R16 = Kaluzny & Mazur (1991a); R17 = Carrera & Pancino (2011); R18 = Noriega-Mendoza & Ruelas-Mayorgo (1997); R19 = Janes & Smith (1984); R20 = Nissen et al. (1987); R21 = Piatti et al. (1995); R22 = Reddy et al. (2012); R23 = Mikolaitis et al. (2011); R24 = Friel et al. (2002); R25 = McClure et al. (1981); R26 = Kaluzny & Mazur (1991c); R27 = Aparicio et al. (1993); R28 = Bragaglia et al. (2008).

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