Abstract
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 .
- Received 23 July 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.251304
©2001 American Physical Society
