Dr. Moran will undertake a survey of the optical spectra of galaxies closer than about 250 million light years, making a census of their nuclear activity, which is powered by a central black hole. He will select galaxies from both the Sloan Digital Sky Survey (SDSS), and a survey in neutral hydrogen from the Arecibo radio telescope, in the 4600 square degrees where these overlap. Where the spectra from SDSS are not of adequate quality, he will obtain his own spectra. The contribution of the galaxy's starlight will be subtracted from the spectrum, to reveal the nuclear activity powered by the black hole. Dr. Moran expects to find at least 100 nearby galaxies with an active nucleus, most of which will harbor black holes between 1,000 and 1,000,000 times as massive as our Sun. These will allow him to investigate the faint end of the relation between a galaxy's luminosity and the mass of its central black hole.