Based on observations collected at the European Southern Observatory, La Silla, Chile, obtained from the ESO/ST-ECF Science Archive Facility, and on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, operated by AURA Inc. under contract to NASA.

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The size of the NICMOS field was erroneously quoted as 506 square arcsec in Paper II.

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... NDIT = 5

See the SOFI User Manual for a more detailed explanation of the instrument setups: http://www.eso.org/lasilla/Telescopes/NEWNTT/sofi

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... WEB

http://irsa.ipac.caltech.edu/applications/2MASS

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...) =0.42

This value is 0.03 mag smaller than the one adopted in Sect. 4, which was derived from the comparison of the mean locus of the (M_V,V-K) bulge CMD with that of NGC 6528. The lower value of E(B-V) =0.42 is instead required for a best fit with the adopted isochrones, and therefore for a consistent comparison with the synthetic CMD.

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