DGT (Directional Gamma-Ray Telescope)

A first-generation (balloon-borne) coded-aperture imaging telescope covering the energy range 160 keV - 10 MeV using an array of BGO scintillators as a detection plane.

It was capable of imaging photons in the 160 keV to 10 MeV energy range.

This was the second flight and due to the balloon fail, only limited background scientific data was obtained.

Balloon launched on: 9/23/1983 at 23:43 utc
Launch site: Columbia Scientific Balloon Facility, Palestine, Texas, US  
Balloon launched by: National Scientific Balloon Facility (NSBF)
Balloon manufacturer/size/composition: Zero Pressure Balloon N34-5/7/6T-17.15
Balloon serial number: R17.15-2-101
Flight identification number: 1340P
End of flight (L for landing time, W for last contact, otherwise termination time): 9/24/1983 at 2:35 utc
Balloon flight duration (F: time at float only, otherwise total flight time in d:days / h:hours or m:minutes - ): ~3 h
Landing site: 4 miles NE of Crocket, Texas, US
Overall weight: 1600 kgs

The telescope was succesfull launched on September 23, 1983 but little after reach float altitude, the balloon failed.

• A Balloon-Borne Coded Aperture Telescope for Low-Energy Gamma- Ray Astronomy Nuclear Instruments and Methods in Physics Research A274 (1989) 362
• Gamma-ray imaging observations of the Crab and Cygnus regions Ph.D Thesis by Mark Lewis McConnell, University of New Hampshire, 1987
• Observations of cosmic gamma ray sources and their contribution to the diffuse gamma ray background Ph.D Thesis by Debadarshi Bhattacharya, University of New Hampshire, 1990
• The Directional Gamma-Ray Telescope (DGT) Alan Owens website (now available via Archive.Org)