Cosmological constraints on Lorentz violation in electrodynamics.
Infrared, optical, and ultraviolet spectropolarimetry of cosmological sources is used to constrain the pure electromagnetic sector of a general Lorentz-violating standard-model extension. The coefficients for Lorentz violation are bounded to less than 3 x 10(-32).
Kostelecký
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Physics Department, Indiana University, Bloomington, Indiana 47405, USA.
Mewes
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