GRB 190114C


GRB 190114C was a notable gamma ray burst explosion from a galaxy 4.5 billion light years away
near the Fornax constellation, that was initially detected in January 2019. The afterglow light emitted soon after the burst was found to be tera-electron volt radiation from inverse Compton emission, identified for the first time. According to the astronomers, "We observed a huge range of frequencies in the electromagnetic radiation afterglow of GRB 190114C. It is the most extensive to date for a gamma-ray burst." Also, according to other astronomers, "light detected from the object had the highest energy ever observed: 1 Tera electron volt -- about one trillion times as much energy per photon as visible light"; another source stated, "the brightest light ever seen from Earth ... biggest explosion in the Universe since the Big Bang".

Significance

Recent publications following the event indicate that inverse Compton scattering is the mechanism responsible for producing TeV photons. X-ray photons are scattered off of the GRB's polar jets of electrons, which move at 0.9999c. In a scattering event, much of the energy of a relativistic electron is transferred to a photon. Researchers "have been trying to observe such very high energy emission from GRB's for a long time, so this detection is considered a milestone in high-energy astrophysics"..
The most recent studies propose, in summary, a model of binary system of hypernova with two neutron stars, where one of them collapses in a black hole, surrounded by an accretion disk and from whose poles the GRB is launched.