The eclipsing, double-lined, Of supergiant binary Cygnus OB2-B17 V. E. Stroud, J. S. Clark, I. Negueruela, P. Roche, A. J. Norton and F. Vilardell A&A, 511 (2010) A84 Published online: 16 March 2010 DOI: 10.1051/0004-6361/200912123