The project EGRET (energetic gamma-ray experiment telescope) on NASA's Gamma-Ray Observatory GRO

Details The project EGRET (energetic gamma-ray experiment telescope) on NASA's Gamma-Ray Observatory GRO The project EGRET (energetic gamma-ray experiment telescope) on NASA's Gamma-Ray Observatory GRO

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ssrv...49...69k&link_type=abstract

Space Science Reviews, Volume 49, Issue 1-2, pp. 69-84

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gamma Ray Observatory (GRO) is currently planned for a launch from the space shuttle in 1990. After the long hiatus in high-energy gamma-ray astronomy since the end of the COS-B mission in 1982, the Soviet missions Granat and Gamma-1 and the NASA mission GRO will resume observations in the energy range from below 100 keV and extending to above 10 GeV. GRO will carry four instruments designed to cover this range of over five decades in photon energy. It is planned to perform a complete sky survey above 1 MeV in the first year of the GRO mission. Data from this survey will be used to study galactic and extragalactic sources of gamma radiation as well as the galactic and extragalactic diffuse emissions. Additionally, measurements of gamma ray bursts will be performed. The angular and spectral resolution of the GRO instruments is significantly improved with respect to previous experiments. The sensitivity for point sources will be better by an order of magnitude, and the location of strong, high energy sources will be determined to about 0.1° 0.2°. After a brief description of the complement of GRO instruments, a detailed discussion of the high-energy telescope EGRET, its design and scientific objectives, is presented in this review.

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