Reviews of topical problems

Observational gamma astronomy

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a Moscow State Engineering Physics Institute (State University), Kashirskoe shosse 31, Moscow, 115409, Russian Federation

A review is presented of the observational data on detection of cosmic $\gamma$ rays. The importance of observations in $\gamma$ astronomy in solution of a number of basic problems of cosmic-ray physics, astrophysics, and cosmology (for example, the origin and sources of cosmic rays) is emphasized. Observations of isotropic diffuse and galactic components of $\gamma$ radiation are presented and analyzed. Methods are discussed for searching for discrete sources of cosmic $\gamma$ rays, and results are presented on detection of $\gamma$-ray fluxes from the sun, the Crab nebula, pulsar NP 0532, Cyg X-3, and other discrete sources. The results of the observations definitely indicate a variability of the discrete $\gamma$-ray sources. In conclusion a short review is given of new methods of $\gamma$-astronomy observations.

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Fulltext is also available at DOI: 10.1070/PU1974v017n02ABEH004335
PACS: 98.70.Rz, 98.70.Sa, 98.80.Es, 97.60.Gb (all)
DOI: 10.1070/PU1974v017n02ABEH004335
Citation: Gal’per A M, Kirillov-Ugryumov V G, Luchkov B I "Observational gamma astronomy" Sov. Phys. Usp. 17 186–198 (1974)
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Оригинал: Гальпер А М, Кириллов-Угрюмов В Г, Лучков Б И «Наблюдательная гамма-астрономия» УФН 112 491–515 (1974); DOI: 10.3367/UFNr.0112.197403d.0491

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