The OSO-7 Satellite
![photo of OSO-7](https://webarchive.library.unt.edu/eot2008/20090511195834im_/http://heasarc.gsfc.nasa.gov/Images/oso/oso7_small2.gif)
Mission Characteristics
Lifetime : 29
September 1971 - 9 July 1974
Energy Range :
1 keV - 10 MeV
Payload :
- 2 banks of Proportional Counters: 1 - 60 keV, FOV 1° & 3°
- Hard X-ray telescope: 7 - 550 keV, FOV 6.5°, effective area ~64 cm2
- Gamma ray Monitor: 300 keV - 10 MeV, resolution 7.8% at 662 keV
![*](https://webarchive.library.unt.edu/eot2008/20090511195834im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
- X-ray All-sky survey
- Discovery of the 9-day periodicity in Vela X-1 which led to its optical identification as a HMXRB.
- Gamma-ray observations of solar flares
![*](https://webarchive.library.unt.edu/eot2008/20090511195834im_/http://heasarc.gsfc.nasa.gov/Images/heasarc/icons/orangeball.gif)
NSSDC holds the OSO-7 data in their native format.
HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public
Last modified: Thursday, 26-Jun-2003 13:48:53 EDT