NLTE modeling of Stokes vector center-to-limb variations in the CN violet system A. I. Shapiro, D. M. Fluri, S. V. Berdyugina, M. Bianda and R. Ramelli A&A, 529 (2011) A139 Published online: 20 April 2011 DOI: 10.1051/0004-6361/200811299