Photometric reverberation mapping of 3C 120 F. Pozo Nuñez, M. Ramolla, C. Westhues, C. Bruckmann, M. Haas, R. Chini, K. Steenbrugge and M. Murphy A&A, 545 (2012) A84 Published online: 11 September 2012 DOI: 10.1051/0004-6361/201219107