BASIS - Burst Arc Second Imaging and Spectroscopy. Selected concept study for gamma-ray bursts. MIDEX/SMEX class.

BATSE - Burst and Transient Source Experiment on CGRO. Gamma-ray burst instrument and all-sky monitor. Energy range is 0.02-1 MeV.

BeppoSAX - launched in April 1996 and named in honor of Giuseppe Occhiallini, Satellite per Astronomia X, is a broad-band, X-ray mission featuring 4 instruments covering the energy range from 0.1-200 keV.

BLAST - Burst Locations with an Arc Second Telescope. MIDEX proposal.

CANGAROO - Collaboration between Australia and Nippon for a Gamma-Ray Observatory in the Outback. Features a pair of currently operating southern hemisphere air Cherenkov detectors.

CATSAT - Cooperative Astrophysics and Technology SATellite. A gamma-ray burst experiment utilizing several instruments and intended to measure among other things, the soft x-ray spectrum in order to address the GRB burst distance scale. A project of the Student Explorer Demonstration Initiative program.

CELESTE - CErenkov Low Energy Sampling & Timing Experiment. A proposed air Cherenkov instrument which would operate in the 20-300 GeV range.

COMPTEL - Imaging Compton Telescope on CGRO. Wide-field (~1 sr) imaging instrument. Energy range: 1 - 30 MeV.

CGRO - Compton Gamma Ray Observatory. NASA Great Observatory for 15 keV to 30 GeV astronomy. Four instruments onboard are BATSE, OSSE, COMPTEL, and EGRET. Launched in 1991.

EGRET - Energetic Gamma Ray Experiment Telescope on CGRO. Wide-field (~0.6 sr) imaging instrument. Energy range: 0.02 - 30 GeV.

ESA - European Space Agency. An organization of 14 member states which promotes space research and technology.

ETA - Energetic Transient Array. Selected concept study for gamma-ray bursts. MIDEX/SMEX class.

EXIST - Energetic X-ray Imaging Survey Telescope. Selected concept study for a Midex class hard X-ray all-sky survey.

GLAST - Gamma-ray Large Area Space Telescope. Selected concept study for high-energy gamma-ray astronomy from 10 MeV - 100 GeV. Intermediate class.

GRANAT - Russian mission with French gamma-ray instrument (SIGMA). SIGMA images with ~10 arcmin resolution in 0.04-1.3 MeV range.