REVERBERATION MAPPING OF THE SEYFERT 1 GALAXY NGC7469

A large reverberation-mapping study of the Seyfert 1 galaxy NGC 7469 has yielded emission-line lags for H beta [lambda]4861 and He II [lambda]4686 and a central black hole mass measurement M sub(BH) approximately 1 x 10 super(7) M sub([middot in circle]), consistent with previous measurements. A very low level of variability during the monitoring campaign precluded meeting our original goal of recovering velocity-delay maps from the data, but with the new H beta measurement, NGC7469 is no longer an outlier in the relationship between the size of the H beta -emitting broad-line region and the luminosity of the active galactic nucleus. It was necessary to detrend the continuum and H beta and He II [lambda]4686 line light curves and those from archival UV data for different time-series analysis methods to yield consistent results.