Selection of metal-poor giant stars using the sloan digital sky survey photometric system

Amina Helmi, Željko Ivezić, Francisco Prada, Laura Pentericci, Constance M. Rockosi, Donald P. Schneider, Eva K. Grebel, Daniel Harbeck, Robert H. Lupton, James E. Gunn, Gillian R. Knapp, Michael A. Strauss, Jonathan Brinkmann