The Small Astronomy Satellite 2 (SAS-2)
The second NASA Small Astronomy Satellite (SAS-2)
was dedicated to gamma-ray astronomy in the energy range above 35 MeV. SAS-2
was launched on 1972 November 15 and began operations on 1972 November 19.
On 1973 June 8, a failure of the low-voltage power supply ended the collection
November 1972 - 8 June 1973
20 MeV - 1 GeV
- 32-level wire spark-chamber aligned with satellite spin axis (20 MeV-1
GeV), eff. area 540 cm2
Archive: Raw data, image and exposure maps
- The first detailed look at the gamma-ray sky.
- Established the high energy component of diffuse celestial
- Correlated the gamma-ray background with galactic structural
[About SAS-2] (http://heasarc.gsfc.nasa.gov/docs/sas2/sas2_about.html)