TY - JOUR AU - Barrio Uña, Juan Abel AU - Bonnefoy, Simon AU - Contreras González, José Luis AU - Domínguez Díaz, Alberto AU - Fonseca González, María Victoria AU - Fidalgo, David Friedrich Carreto AU - López Moya, Marcos AU - Nievas Rosillo, Mireia AU - Ahnen, L.M. AU - Ansoldi, S. PY - 2017 DO - 10.1093/mnras/stx1405 SN - 0035-8711 UR - https://hdl.handle.net/20.500.14352/18349 T2 - Monthly Notices of the Royal Astronomical Society AB - Spontaneous breaking of Lorentz symmetry at energies on the order of the Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relations for the photon in vacuum. Consequently, gamma-rays of different... LA - eng M2 - 4608 PB - Oxford University Press. KW - High-energy emission KW - Gamma-ray emission KW - Crab pulsar KW - Eclipsing binary KW - Major upgrade KW - Psr 1957+20 KW - Nebula KW - Acceleration KW - Wind KW - Discovery KW - Radiation mechanisms: Non-thermal KW - Binaries:close KW - Pulsars: general KW - Pulsars: individual: B1957+20 KW - Gamma-rays: general TI - Observation of the black widow B1957+20 millisecond pulsar binary system with the MAGIC telescopes TY - journal article VL - 470 ER -