Journal
ASTROPHYSICAL JOURNAL
Volume 842, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/aa7630
Keywords
astroparticle physics; gamma-ray burst: individual (GRB 160625B); gravitation
Categories
Funding
- National Basic Research Program (973 Program) of China [2014CB845800]
- National Natural Science Foundation of China [11673068, 11603076, 11103083, 11361140349]
- Youth Innovation Promotion Association [2011231, 2017366]
- Frontier Sciences [QYZDB-SSW-SYS005]
- Chinese Academy of Sciences [XDB23000000]
- Natural Science Foundation of Jiangsu Province [BK20161096]
- Guangxi Key Laboratory for Relativistic Astrophysics
- Spanish Ministry [AYA 2012-39727-C03-01, AYA2015-71718-R]
- Joint NSFC-ISF Research Program [11361140349]
- Israel Science Foundation
- NASA [NNX 13AH50G]
- United States Department of Energy [DE-SC0010120]
- Indiana University Center for Spacetime Symmetries
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Violations of Lorentz invariance can lead to an energy-dependent vacuum dispersion of light, which results in arrival-time differences of photons with different energies arising from a given transient source. In this work, direction-dependent dispersion constraints are obtained on nonbirefringent Lorentz-violating effects using the observed spectral lags of the gamma-ray burst GRB 160625B. This burst has unusually large high-energy photon statistics, so we can obtain constraints from the true spectral time lags of bunches of high-energy photons rather than from the rough time lag of a single highest-energy photon. Also, GRB 160625B is the only burst to date having a well-defined transition from positive lags to negative lags, providing a unique opportunity to distinguish Lorentz-violating effects from any source-intrinsic time lag in the emission of photons of different energy bands. Our results place comparatively robust two-sided constraints on a variety of isotropic and anisotropic coefficients for Lorentz violation, including the first bounds on Lorentz-violating effects from operators of mass dimension 10 in the photon sector.
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