[Fe/H] derived from the light curves of RR Lyrae stars in the Galactic halo C. Wu, Y. L. Qiu, J. S. Deng, J. Y. Hu and Y. H. Zhao A&A, 453 3 (2006) 895-902 Published online: 28 June 2006 DOI: 10.1051/0004-6361:20054343