Spectroscopic and Photometric Observations of ω Centauri's Blue Horizontal Branch stars - D'Cruz, N. L.; Rood, R. T.; O'Connell, R. W.; Dickens, R. J.; Hatzidimitriou, D.; Dorman, B.; Landsman, W. B.; Whitney, J. H. (Omega Centauri, A Unique Window into Astrophysics, 2002)