The OSO-8 Satellite


artist concept of OSO-8 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] [Software] [Gallery] [Publications]


HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public

Last modified: Thursday, 26-Jun-2003 13:48:54 EDT

The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 18 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. We thank you in advance for your valuable feedback.