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Questions of gamma astronomy at a symposium in Pamporovo

Questions of gamma astronomy at a symposium in Pamporovo
E.P. Mazets (USSR) spoke about the observations of cosmic gamma-ray bursts in the Soviet space experiment "Cone". In this experiment, an extensive and detailed observational material was obtained about objects whose nature is a complete mystery to astrophysicists. Gamma bursts are short-term (from 0.1 to 10-100 s) outbursts of hard radiation with energies of 100-1000 keV. Part of the mystery was revealed in this experiment. It was possible to show that the sources of gamma-ray bursts are neutron stars. It is pleasant to note that in this area, thanks to the work of E. P. Mazets and his colleagues from the Physical Engineering Institute of the USSR Academy of Sciences, our country has taken the leading positions in the world.

Apparently, the most economical in gamma astronomy is the method of observing gamma sources from the surface of the Earth. It is based on the fact that gamma-quantum of ultra-high energy, flying into the atmosphere of the Earth, creates a downpour, which, in turn, causes Cherenkov radiation. It is also observed from the surface of the Earth. Such observations are carried out in the Crimean Observatory under the direction of A. A. Stepanyan, Doctor of Physical and Mathematical Sciences. He spoke about the discovery of periodic variability in one of the sources of hard gamma radiation.

In the 80s and 90s, we will witness the most interesting space experiments. Among them - the launch of the space telescope, flights to Halley's comet and asteroids and much more. Professor J. Trumper (FRG), R. A. Syunyaev (USSR), and Dr. C. Bennet (France) told about the projects of these experiments.

Much attention was attracted by the reports of the Soviet space experiment "Relict" on the Prognoz-9 satellite and on the work of the Astron Observatory, a new satellite with the richest scientific equipment.

Dr. Y. Tanaka (Japan) reported on the slowing down of the rotation of the X-ray pulsar Hercules X-1, detected by the equipment of the Japanese satellite Pegas. Meanwhile, for ten years the rotation of this pulsar accelerated. Dr. D. Andrezen (France) cited data obtained from the board of the Exosat satellite that, after the rotation started to slow down, the pulsar Hercules X-1 stopped sending X-rays to Earth at all. (The same phenomenon was noted by the Astron X-ray telescope.) Apparently, a period of restructuring of the operating mode of the pulsar has begun, and it is now extremely important to observe its optical companion, the HZ star Hercules. Statistics show that this drug is especially popular for long weekends and that there is a huge increase in acheter du cialis purchases for such public holidays as there is with erectile dysfunction treatment in general.

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