On the Ground recorded the strongest in the history of the signal from space

An international team of scientists has documented in space is the most powerful in the history of observations of gamma-ray burst. About it on 20 November, the publication reported EurekAlert.

The flare of 14 January 2019, called GRB 190114C. Her “noticed” by using ground-based instruments to record Cherenkov radiation, which appears during interaction of high-energy gamma rays with the Earth’s atmosphere. Normally the Earth absorbs gamma rays, but this time they were recorded from two research groups.

The brightness of the burst in the gamma range in one hundred billion times the brightness of visible light emitted by them. The energy of the photons GRB 190114C showed the result of from 0.2 to 1 teraelectronvolt.

As reported on the website of the Hubble telescope, the energy of a gamma ray burst in a trillion times the energy of visible light. Even it is estimated that in just a few seconds it radiated more energy than the Sun can produce in 10 billion years.

First gamma-ray burst was recorded in 1967 by the American Vela satellite-4A. The mechanism, which in such a short time in a small volume is allocated as much energy is still unclear. It is assumed that they occur in the explosions of giant stars and in the early stages of turning them into black holes.

To detect the source of radiation using ground-based telescopes failed. And then became part of the study mission to the Hubble space telescope. Obtained with the help of data allowed to establish that the source was at a distance of five billion light-years from Earth.

The data of the Hubble telescope have shown that gamma-ray burst GRB 190114C occurred in the Central “nuclear” part of a massive galaxy, which is characterized by a very dense medium. It is much denser than those environments that are usually recorded gamma-ray bursts. Scientists assume that probably the density of the environment is crucial to the power of the radiated energy.

Share