BeppoSAX
Spacecraft
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BeppoSAX was an Italian–Dutch satellite for X-ray astronomy which played a crucial role in resolving the origin of gamma-ray bursts, the most energetic events known in the universe. Wikipedia
Launch date: April 30, 1996
Manufacturers: National Research Council and Alenia Aeronautica
HPGSPC: High Pressure Gas Scintillation Proportional Counter
MECS: Medium Energy Concentrator Spectrometer