I review progress made in understanding the nature of the broad-line region (BLR) of active
galactic nuclei (AGNs) and the role BLRs play in the AGN phenomenon. The high equivalent …

We present a sample of 151 dwarf galaxies (10 8.5≲ M⋆≲ 10 9.5 M☉) that exhibit optical
spectroscopic signatures of accreting massive black holes (BHs), increasing the number of …

Abstract The AGN Black Hole Mass Database is a compilation of all published spectroscopic
reverberation-mapping studies of active galaxies. We have created a public Web interface …

The radius–luminosity () relationship of active galactic nuclei (AGNs) established by the
reverberation mapping (RM) observations has been widely used as a single-epoch black …

As one paper in a series reporting on a large reverberation mapping campaign of super-
Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs), we …

Motivated by recent progress in the statistical modeling of quasar variability, we develop a
new approach to measuring emission-line reverberation lags to estimate the size of broad …

I review the current status of quasar black hole (BH) mass estimations. Spectroscopic
methods have been developed to estimate BH mass in broad line quasars to an accuracy …

We present an updated and improved M bh–σ diagram containing 64 galaxies for which M
bh measurements (not just upper limits) are available. Because of new and increased black …

We present the final results from a high sampling rate, multi-month, spectrophotometric
reverberation mapping campaign undertaken to obtain either new or improved Hβ …

In the Spring of 2011 we carried out a 2.5 month reverberation mapping campaign using the
3 m Shane telescope at Lick Observatory, monitoring 15 low-redshift Seyfert 1 galaxies. This …