Astronomische Nederlandse Satelliet (ANS)

Astronomische Nederlandse Satelliet (ANS) was launched by a American Scout rocket from the Western Test Range, California, on August 30 1974 into a polar orbit. It was a collaborative effort between the Netherlands (NIVR) and USA (NASA). The University of Groningen and Utrecht (Netherlands) provided the Ultraviolet and the Soft X-ray experiments, while the American Science and Engineering company provided the hard X-ray experiment.
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Mission Characteristics

Lifetime: 30 August 1974 - 14 June 1977
Energy Range: 0.1 - 30 keV (X-ray) 1500-3300 (UV)
  • Ultraviolet experiment (1500-3300Å)
  • Soft X-ray experiment (SXX)
    • Parabolic mirror (eff area=144 cm2) with a small area proportional counter on the focal plane
      0.16-0.28 keV 34´ FOV
    • Proportional counter 1-7 keV eff area=45 cm2 38´ X 75´ FOV
  • Hard X-ray experiment (HXX)
    • LAD 10´ x 3° FOV 1-30 keV eff area=40cm2
    • Bragg Crystal Assembly (BCA) to search for Si lines

  • [About ANS] [Gallery] [Publications]

    Science Highlights

  • Discovery of the X-ray bursts
  • Detection of X-ray from Stellar Coronae (Capella)
  • First detection of X-ray flares from UV Ceti and YZ CMi
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    No data available at HEASARC

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