title: Limits on Lorentz violation from synchrotron and inverse Compton sources.
abstract: We derive new bounds on Lorentz violations in the electron sector from existing data on high-energy astrophysical sources. Synchrotron and inverse Compton data give precisely complementary constraints. The best bound on a specific combination of electron Lorentz-violating coefficients is at the 6 x 10(-20) level, and independent bounds are available for all the Lorentz-violating c coefficients at the 2 x 10(-14)level or better. This represents an improvement in some bounds by 14 orders of magnitude.
authors.affiliation: Department of Physics, Indiana University, Bloomington, Indiana 47405 USA. baltschu@indiana.edu
authors.forename: B
authors.initials: B
authors.lastname: Altschul