The Germanium GAlactic Plane Patrol mission
作者:
Jack Tueller,
Neil Gehrels,
Marvin Leventhal,
期刊:
AIP Conference Proceedings
(AIP Available online 1991)
卷期:
Volume 265,
issue 1
页码: 390-394
ISSN:0094-243X
年代: 1991
DOI:10.1063/1.42769
出版商: AIP
数据来源: AIP
摘要:
The goal of the Germanium GAlactic Plane Patrol mission (GGAPP) is to provide a continuous monitor of the Galactic Plane (GP) for variable sources of gamma‐ray lines. Potentially interesting sources include black hole candidates, x‐ray binary systems, pulsars, gamma‐ray bursts, and solar flares. The GGAPP instrument is an array of Ge detectors cooled by a mechanical refrigerator to achieve a spectral resolution of 2 keV at 1 MeV (1/500). A bismuth germanate (BGO) shield will restrict the field‐of‐view (FOV) to within 20° of the GP and a modulation collimator system will locate strong sources to <0.3° in galactic longitude, provide a direct means of subtracting background, and mapping the diffuse emission from the GP. The spacecraft will be rotationally stabilized with the spin axis perpendicular to the GP such that the modulator scans in galactic longitude. A HEO or L1 orbit will keep GGAPP far away from the strong background produced by the Earth. GGAPP will provide a natural bridge between GRO and future missions such as INTEGRAL/NAE.
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