Net circular polarization of sunspots in high spatial resolution K. Ichimoto, S. Tsuneta, Y. Suematsu, Y. Katsukawa, T. Shimizu, B. W. Lites, M. Kubo, T. D. Tarbell, R. A. Shine, A. M. Title and S. Nagata A&A, 481 1 (2008) L9-L12 Published online: 25 January 2008 DOI: 10.1051/0004-6361:20079055