Black Hole Masses in Three Seyfert Galaxies
  We analyze published reverberation mapping data for three Seyfert galaxies (NGC 3227, NGC 3516, and NGC 4593) to refine the mass estimate for the supermassive black hole in the center of each object. Treatment of the data in a manner more consistent with other large compilations of such masses allows us to more securely compare our results to wider samples of data, e.g., in the investigation of the M_bh-sigma relationship for active and quiescent galaxies. 
C.A. Onken (1), B.M. Peterson (1), M. Dietrich (2), A. Robinson (3),   I.M. Salamanca (4) ((1) The Ohio State University, (2...