The Third Small Astronomy Satellite (SAS-3)
The third US Small Astronomy Satellite (SAS-3)
was launched in May 1975, with 3 major scientific objectives: 1)
determine bright X-ray source locations to an accuracy of 15
arcseconds; 2) study selected sources over the energy range
0.1-55 keV; and 3) continuously search the sky for X-ray novae,
flares, and other transient phenomena.
It was a spinning satellite with pointing capability.
Lifetime: May 1975 - Apr 1979
Energy Range: 0.1-60 keV
There are four X-ray experiments on SAS-3 that all used proportional
counters as detectors with different collimating system.
The experiments were not co-aligned.
- Modulation collimators (2-11 keV)
- Slat and Tube collimators (1 up to 60keV)
- Low-energy detector system
0.15-1.0 keV, 2.9° FOV
Archive: Raw Data in their native format
Discovery of a dozen X-ray burst sources among which
the Rapid Burster
First discovery of X-ray from an highly magnetic WD binary
system, AM Her
- Discovery of X-ray from Algol and HZ 43.
Precise location of about 60 X-ray sources
Survey of the Soft X-ray background (0.1-0.28 kev)