Black hole masses and eddington ratios at 0.3 < z < 4

Juna A. Kollmeier, Christopher A. Unken, Christopher S. Kochanek, Andrew Gould, David H. Weinberg, Matthias Dietrich, Richard Cool, D. E.Y. Arjun, Daniel J. Eisenstein, Buell T. Jannuzi, Emeric L.E. Floc'H, Daniel Stern