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.

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The Hakucho [CORSA-B] Satellite

image of Hakucho Corsa-B was the first X-ray astronomy Japanese satellite. Launched on 21 February 1979, it was renamed Hakucho (Japanese for swan) symbolizing one of the most interesting X-ray objects, Cyg X-1. As many other X-ray satellite launched in that period, Hakucho was designed to study and monitor transient phenomena with particular emphasis on X-ray bursts. It was still operating when the second X-ray Japanese satellite Tenma launched in 1983.

Mission Characteristics

* Lifetime : 21 February 1979 - 16 Aprile 1985
* Energy Range : 0.1 - 100 keV
* Payload :
  • Very Soft X-ray (VSX) experiment 0.1-0.2 keV
    Four units of proportional counters
    each with eff area ~ 78 cm2
    Two parallel to the spin axis FOV = 6.3° X 2.9° FWHM
    two offset FOV = 24.9° X 2.9° FWHM
  • Soft X-ray (SFX) 1.5-30 keV Six units of proportinal counters
    Parallel to the spin axis :
    • Two FOV 17.6 deg FWHM; eff area=69 cm2 each
    • Two FOV 5.8 deg FWHM; eff area=40&83 cm2
    Two offset FOV = 50.3° X 1.7° FWHM eff area =32 cm2 each
  • Hard X-ray (HDX) 10-100 keV scintillator
    FOV 4.4° X 10.0° FWHM eff area =45 cm2
* Science Highlights:
  • Discovery of soft X-ray transient Cen X-4 and Apl X-1
  • Discovery of many burst sources
  • Long-term monitoring of X-ray pulsar (e.g. Vela X-1)
  • Discovery of 2 Hz variability in the Rapid Burster later named Quasi Period Oscillation.
* Archive : No data available at HEASARC
[About Hakucho] [Gallery] [Publications]

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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.