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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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From LCDM models of structure formation, massive black hole mergers must be extremely common in the history of the universe. Many should be merging in the local (z~0) universe. I discuss several methods of searching for massive black hole mergers at a range of separations in galactic nuclei and their prospects for success with near-future space telescopes. I discuss the possibility of intermediate mass black hole formation in accretion disks around supermassive black holes and I outline the prospects for a search for radial velocity shifts in the broad FeKa line as a means of searching for relatively wide massive black hole binaries.