•What are
 they?
 –Observational
 Properties
 –Standard
 Model (accreting supermassive black hole)
 •How are
 they found?
 –A variety
 of survey types for a “zoo” of AGNs
 –Unified
 Models: orientation, luminosity, radio properties
 •AGN
 Physics
 –Accretion
 Disks and SEDs
 –Emission
 Lines and Photoionization
 –Reverberation
 and Black Hole Mass
 •Relationship
 with their host galaxies
 –Host
 galaxies
 –Mutual
 Evolution?
 
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