The Compton Gamma Ray Observatory (CGRO) was a spacecraft
observing Gamma Rays. It was launched in 1991 and
functioned until 2000.
- BATSE - Burst and Transient Source Experiment
- OSSE - Oriented Scintillation Spectrometer Experiment
- COMPTEL - Imaging Compton Telescope
- EGRET - Energetic Gamma Ray Experiment Telescope
CGRO finished some Surveys and caught Gamma-Ray Bursts
including a strong burst in 1999.
Goddard Space Flight Center (GSFC)