Guest Observer Facilities & Science Centers Select One AGILE ASCA BeppoSAX COBE CGRO Chandra EUVE Fermi (formerly GLAST) GALEX HETE-2 INTEGRAL ROSAT RXTE Suzaku Swift WMAP XMM-Newton NASA Archives Select One ADS AstroGravS EOSDIS HORIZONS IRSA LAMBDA MAST Michelson NED NSSDC NStED PDS SDAC SPDF Spitzer Science Center HEASARC Tip: View all tips Compton Gamma-Ray Observatory (CGRO) The Compton Gamman-Ray Observatory was launched on April 5, 1991. The second of NASA's great observatories, CGRO has four instruments that cover an unprecedented six orders of magnitude in energy, from 30 keV to 30 GeV. This range improves the sensitivity of previous missions by a full order of magnitude. The Laboratory has three areas of involvement with the CGRO: the EGRET team manages the monitoring and processing of data for the EGRET instrument; responsibility for spectroscopy analysis software for the BATSE instrument; and management of the GRO Science Support Center to support the guest investigator program.