The Central Black Hole and Relationships with the Host Galaxy
Bradley M. Peterson

We will review the fundamental observational properties of AGNs, with emphasis on the
evidence for supermassive black holes, and will discuss the observed characteristics of
AGN continuum and emission-line variability. We describe the theory and practice of
emission-line reverberation mapping, with emphasis on measurement of black hole mass
measurement. The relationships between black hole mass and the host-galaxy bulge velocity
dispersion and total luminosity will be investigated. We will also cover black hole mass
estimation from scaling relationships, the observational requirements to obtain
velocity-delay maps, and the nature of narrow-line Seyfert 1 galaxies.