Imagine the Universe!
Imagine Home | Satellites and Data |

The OSO-8 Satellite

artist concept of OSO-8
Credit: NASA

The 8th Orbiting Solar Observatory (OSO-8) was launched on 21 June 1975. While OSO-8's primary objective was to observe the Sun, four instruments were dedicated to observations of other celestial X-ray sources brighter than a few milliCrab. OSO-8 ceased operations on 1 October 1978.

Mission Characteristics

* Lifetime: 21 June 1975 - 1 October 1978
* Energy Range: 0.15 keV - 1 MeV
* Payload:
  • GSFC Cosmic X-Ray Spectroscopy Experiment (GCXSE)
    Detector A (2-60 keV): Eff. area = 263 cm2, FOV = 5°
    Detector B (2-20 keV): Eff. area = 37 cm2, FOV = 3°
    Detector C (2-60 keV): Eff. area = 237 cm2, FOV = 5°
  • High Energy Celestial X-ray Experiment
    0.01-1 MeV eff. area 27.5 cm2, FOV 5°
  • Soft X-ray Background Radiation Experiment
    0.15-45 keV eff. area 51.8 cm2, 43.0 cm2, 41.7 cm2, FOV 2.7° with 3° spatial resolution
  • Graphite Crystal X-ray Spectrometer
    2-8 keV, FOV 3°
* Science Highlights:
  • Iron-line detection in the X-ray spectra of a cluster of galaxies.
  • Detection of Black-Body spectrum from X-ray bursts.
  • Set upper limit on the polarization of radiation from several X-ray binaries.
* Archive: Lightcurves and Raw data from the GCXSE.

[About OSO-8] [Archive] [Gallery] [Publications]

If words seem to be missing from the articles, please read this.

Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Barbara Mattson
Curator: Meredith Gibb
Responsible NASA Official: Phil Newman
All material on this site has been created and updated between 1997-2014.
This page last updated: Thursday, 11-Oct-2007 13:43:50 EDT