Gamma-radiation with E gamma 5 MeV detected from Seyfert galaxy 3C120 and region with 1" = 190 deg and b" = 20 deg

The observation of the Galaxy anticenter region in gamma-rays with E gamma = 5 / 100 MeV was made by gamma-telescope Natalya-1 in a balloon flight. The flight was performed at the ceiling 5.1 + or - 0.1 g/sq cm, magnetic cutoff being 17 GV. The description of the instrument and the analysis of the experiment conditions are given. The tracks of electron-positron pairs generated by gamma-quanta in the convertors were detected by wire spark chambers. The recorded events were classified manually by an operator using a graphic display into three classes: pairs, single and bad events. The arrival angle of gamma-quanta and their energy for selected gamma-ray events (pairs and singles) were determined through multiple scattering of pair components in the convertors. On the basis of the data obtained the celestial maps were made in gamma-rays for E sub gamma 5 MeV and E gamma 20 MeV energy ranges

Observation of the stopping of particles with masses of 500 to 600 me /

Prepared for the National Science Foundation Russian Science Translation-Dictionary Project, Columbia University.Translated from Doklady Akademii Nauk SSSR, 92, 511-13 (1953)--title page."December 1953."Includes bibliographic references (page 4)Mode of access: Internet

Soviet-Indian research of cosmic radiation by high altitude balloons

The report presents some results on the cosmic radiation intensity research carried out with the high-altitude balloons for the period of 1977-1979. The intensity of gamma-radiation with the energy above 40 MeV was measured in two balloon flights at an altitude of 4-7 g/cm2 of residual atmosphere in the vicinity of the geomagnetic equator. A temporal analysis of the intensity to discover fluctuations with periods in the range of 4-60 min was made. Quasi-periodic fluctuations of gamma-radiation intensity with 5 min periods, amplitude ∼ 20% and duration of several hours were discovered. Possible mechanisms of such fluctuation appearance are discussed. The report gives the results of measuring downward, upward and horizontal electron fluxes in the vicinity of the equator. The obtained data and the data provided by satellites are compared. The report discusses the prospects of further joint Soviet-Indian research of cosmic gamma-radiation