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Since 1994, John Tomsick has been working in astrophysics, conducting observations and developing high-energy instrumentation. He received his PhD from Columbia University in 1999, was based at UC San Diego from 1999-2006, and has been conducting research at UCB/SSL since 2006. John has been leading the COSI group as Principal Investigator of the COSI SMEX mission. John is the Associate Director for Astrophysics and Exoplanets at SSL and a member of the SSL Executive Committee. John’s recent published work has included results using current high-energy satellites and the COSI-balloon instrument to observe accreting black holes, neutron stars, white dwarfs, and Galactic emission lines. Science areas include methods of determining black hole spins and white dwarf masses, uncovering populations of hard X-ray Galactic sources, and studying gamma-ray emission across the Milky Way Galaxy.
