Imagine the Universe!
Imagine Home | Satellites and Data |

Astronomische Nederlandse Satelliet (ANS)

photo of 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, the American Science and Engineering provided the hard X-ray experiment.

Mission Characteristics

* Lifetime: 30 August 1974 - 14 June 1977
* Energy Range: 0.1 - 30 keV (X-ray) 1500-3300 (UV)
* Payload:
  • Ultraviolet experiment (1500-3300 angstrom)
  • Soft X-ray experiment (SXX) composite of two parts
    • 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) composite of two parts
    • LAD 10´ x 3° FOV 1-30 keV eff area=40cm2
    • Bragg Crystal Assembly (BCA) to search for Si lines
* 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
* Archive: No data available at HEASARC
[About ANS] ( [Gallery] ( [Publications] (

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
Acting Project Leader: Dr. Barbara Mattson
All material on this site has been created and updated between 1997-2012.

DVD Table of Contents
Educator's Index