Russian Cone recorded gamma-ray bursts in space



MOSCOW, September 27 — RIA Novosti. The brightest gamma-ray bursts, the duration of which was a few tens of seconds, was registered on September 18 by several spacecraft, including the Russian instrument "cone" on board an American satellite "Wind," the statement on the website of Roscosmos.

Gamma-ray bursts — one of the most extraordinary and enigmatic astrophysical phenomena. They are a short-term sporadic cosmic gamma rays coming in all directions from the depths of space.

"The US-Russian space experiment performed detailed studies of a unique gamma-ray burst GRB 110918A. The brightest flash hard electromagnetic radiation, the duration of which was a few tens of seconds, was recorded September 18, 2011, "- said in a statement.

Outbreak, including the Russian fixed detector "Cone", set in the American spacecraft "Wind" (Wind) as part of the Russian-American experiment "Konus-Wind" by observations of gamma-ray bursts, and interplanetary probes "Messenger" and "Mars Odyssey", situated at a great distance from Earth.

"Cosmic gamma-ray bursts, as a source of extremely high fluxes of hard electromagnetic radiation are among the most important objectives of extra-atmospheric astrophysical research. According to common belief, the long gamma-ray bursts, which include the September 18, result from the collapse of supermassive stars at cosmological distances of billions of light-years "- the report says.

According to data obtained, "cone", source of the outbreak is at a distance of 7.5 billion light-years (though the age of the universe is currently estimated at about 13.7 billion years), and its energy is ten times higher than the energy of a typical gamma-ray bursts and was 1.9 * 10 ^ 35 terajoules.

Data processing "Cone-Wind" by event GRB 110918A continues on its results prepared publications in leading scientific journals. Gamma-ray burst was not available for the two main orbital gamma-ray telescopes "Swift" and "farm" because of the radiation shielding and interference from the Earth's radiation belts, the report says.

In the experiment, "Cone-Wind" which continue for almost 17 years, implemented a different strategy of observation, two highly sensitive detector constantly inspect the entire sky in interplanetary space with no shadowing and interference from the Earth's radiation belts. The equipment detects the brightness curves of bursts with detail to a thousandth of a second, and the measurements of the energy spectra are adapted to the current intensity.

Scientific equipment "Cone-Wind" is designed and manufactured in the Physical-Technical Institute (PTI) of. AF Joffe, under the scientific supervision of Corresponding Member of RAS Eugene Mazets. The head of the U.S. side is Dr. Thomas Kline of NASA Goddard Space Flight Center. Joint experiment carried out in the framework of cooperation between Roskosmosos and NASA.

Case history

Gamma-ray bursts were discovered in the years 1969-73 in the U.S. satellite observations "Vela", controlling international treaty banning nuclear tests in three environments.

A breakthrough in the study of cosmic gamma-ray bursts has been carried out in the observations with equipment "cone" on the domestic space vehicles "Venus 11-14" in the years 1979-83. Success was defined creating a highly sensitive detector system, which allowed to identify the main characteristics of gamma-ray bursts.

The result of the experiment "Cone" vehicles "Venus" was the opening of a new, very rare class of sources repeating, over the spectrum of soft flares, received the name of soft gamma repeaters. They belong to our galaxy, and, according to current views, are slowly rotating neutron stars with enormous magnetic field with magnetic induction 1014-1015 Gauss.

One such source is the nearest satellite of our galaxy — the Large Magellanic Cloud. Fifth March 1979 there was registered a powerful short initial pulse and the subsequent pulse "tail" with a period of eight seconds. Over the following months there were 16 recurrent bursts.

The next giant outburst was registered only 27 August 1998 equipment "Cone-Wind."

Source: RIA Novosti

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