The gamma-ray telescope Gamma-1 |
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| Institution: | (1) Space Research Institute of the Academy of Sciences of the U.S.S.R., U.S.S.R.;(2) P.N. Lebedev Physical Institute of the Academy of Sciences of the U.S.S.R., U.S.S.R.;(3) Physical and Technical Institute of the Academy of Sciences of the U.S.S.R., U.S.S.R.;(4) Moscow Physical Engineering Institute, U.S.S.R.;(5) Centre d'Études Nucléaires, Saclay, France;(6) Centre d'Études Spatiales des Rayonnements, Toulouse, France;(7) Centre National d'Etudes Spatiales, Toulouse, France |
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| Abstract: | The telescope  Gamma-1 is designed to investigate cosmic gamma rays in the energy range from 50 MeV to 5000 MeV. The geometrical sensitive area of the telescope amounts to 1500 cm2, the angular resolution in each direction is equal to 1.2° at the energy 300 MeV and is about 20 when including a coded mask in the telescope, the energy resolution changes from 70% at 100 MeV to 35% at 550 MeV. The characteristics of the telescope and its systems have been determined by the Monte-Carlo method as well as by accelerator calibrations. Discrete sources at the intensity level of 10–7 quanta cm–2 s–1 may be recorded in a year of observations with the gamma-ray telescope Gamma-1 with a source location accuracy of  10 arc min. |
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