... 32

Based on observations collected at ESO telescopes under programs 072.D-0550 and 074.D-0571.

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...

Tables 7, 9-11 are only available in electronic form at http://www.aanda.org

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... IRAF

IRAF is distributed by the National Optical Astronomical Observatories, which are operated by the Association of Universities for Research in Astronomy, under contract with the National Science Foundation.

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... (2MASS

The Two Micron All Sky Survey is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the national Aeronautics and Space Administration and the National Science Foundation.

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...1973)

http://verdi.as.utexas.edu/

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... transitions

MOOG was recently updated in order to give the possibility of using the Barklem coefficients.

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...$\log n(\rm {Fe})$

$\log n(\rm {Fe})=12+\log (N(\rm {Fe})/N(\rm {H}))$, absolute number density abundance.

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... literature

Part of these data are collected in Table 7 of Friel et al. (2003, see also references therein); others are from Carretta et al. (2004, 2005), Carraro et al. (2004), Villanova et al. (2005), Yong et al. (2005), Randich et al. (2006), Gratton et al. (2006); note that the quoted investigations are all based on giant stars with the exception of Randich et al. (2006) in which dwarfs and slightly evolved stars of M 67 were considered.

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... database

http://www.univie.ac.at/webda/

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