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We present the first results from a high sampling rate, multi-monthreverberation mapping campaign undertaken primarily at MDM Observatory withsupporting observations from telescopes around the world. The primary goal ofthis campaign was to obtain either new or improved Hbeta reverberation lagmeasurements for several relatively low luminosity AGNs. We feature results forNGC 4051 here because, until now, this object has been a significant outlierfrom AGN scaling relationships, e.g., it was previously a ~2-3sigma outlier onthe relationship between the broad-line region (BLR) radius and the opticalcontinuum luminosity - the R_BLR-L relationship. Our new measurements of thelag time between variations in the continuum and Hbeta emission line made fromspectroscopic monitoring of NGC 4051 lead to a measured BLR radius of R_BLR =1.87 (+0.54 -0.50) light days and black hole mass of M_BH = 1.73 (+0.55 -0.52)x 10^6 M_sun. This radius is consistent with that expected from the R_BLR-Lrelationship, based on the present luminosity of NGC 4051 and the most currentcalibration of the relation by Bentz et al. (2009a). We also present apreliminary look at velocity-resolved Hbeta light curves and time delaymeasurements, although we are unable to reconstruct an unambiguousvelocity-resolved reverberation signal.

A Revised Broad-Line Region Radius and Black Hole Mass for the Narrow-Line Seyfert 1 NGC 4051