Magnetic activity of F stars observed by Kepler S. Mathur, R. A. García, J. Ballot, T. Ceillier, D. Salabert, T. S. Metcalfe, C. Régulo, A. Jiménez and S. Bloemen A&A, 562 (2014) A124 Published online: 19 February 2014 DOI: 10.1051/0004-6361/201322707