Phase resolved X-ray spectroscopy of HDE 288766: Probing the wind of an extreme Of+/WNLha star G. Rauw, L. Mahy, Y. Nazé, P. Eenens, J. Manfroid and C. A. Flores A&A, 566 (2014) A107 Published online: 20 June 2014 DOI: 10.1051/0004-6361/201423885