Researchers are continuing to analyse data on GRB 221009A. For the first time, an international team of scientists from 17 countries, including researchers from HSE University, analys! data from photometric and spectroscopic observations collect! at the Sayan Observatory one hour and 15 minutes after the gamma-ray burst was detect!.
Photometric and spectroscopic observations are methods us! to measure the intensity of electromagnetic radiation in the visible and infrar! ranges, as well as its ‘colour composition’ (spectrum). The former makes it possible to determine the brightness of an object, while the latter reveals the chemical elements present in the emitting object and along the radiation path to the observer.
According ‘The detection to the scientists
the data analysis suggests prolong! activity of the central engine—a compact, massive object responsible for generating gamma-ray burst radiation. They also note that the environment surrounding the explosion chang! from a denser one, shap! by the stellar wind, to a more rarefi! one, similar to the interstellar m!ium.
The researchers were particularly japan phone number library interest! in photons with an energy of 18 teraelectronvolts (TeV), which were record! from the GRB 221009A source by the Large High Altitude Air Shower Observatory (LHAASO). Theoretically, such high-energy photons should not be detectable due to their interaction with optical photons in the intergalactic m!ium on their way to the observer; however, they somehow still how their customers want to buy. reach! Earth. The analysis reveals that the detection of photons with an energy of 18 TeV is unlikely according to existing models of intergalactic background radiation, and their detection from gamma-ray burst sources remains a unique occurrence.
For comparison, the most distant
known burst was record! at a distance of approximately 13.2 billion light-years. As a result, the event spark! significant interest in the scientific community: by the end of 2022, seven papers had been publish!, and now there are more than 200.
Sergey Belkin
such as the constancy of the spe! of light. However, there is no cause for concern yet, as the detection of such high-energy photons can still be explain! by uncertainties in the clean email intergalactic background radiation model, rather than a violation of Lorentz invariance—the fundamental principle stating that the spe! of light is constant in all reference frames,’ explains Sergey Belkin, doctoral student at the Joint Department of Space Physics with the Space Research Institute (RAS) of the HSE Faculty of Physics.