Scientists Record GRB 221009A, the Brightest Gamma-Ray Burst in Cosmic History
A team of scientists from 17 countries, including physicists from HSE University, analysed early photometric and spectroscopic data of GRB 221009A, the brightest gamma-ray burst ever recorded. The data was obtained at the Sayan Observatory one hour and 15 minutes after the emission was registered. The researchers detected photons with an energy of 18 teraelectronvolts (TeV). Theoretically, such high-energy particles should not reach Earth, but data analysis has confirmed that they can. The results challenge the theory of gamma radiation absorption and may point to unknown physical processes. The study has been published in Astronomy & Astrophysics.
Astrophysicists Look into a Powerful Gamma-ray Burst
An international team of scientists including a HSE researcher have detected a rare optical emission from one of the most powerful gamma-ray bursts in the history of observation. The team measured the parameters of the environment, from which the emission originated, and proceeded to construct a model that simulates the behaviour of gamma-ray bursts. This contributes to our understanding of why such bursts are accompanied by electromagnetic radiation in the visible range. The findings have been published in Nature Astronomy.