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Array of Low Energy X-ray Imaging Sensors

Array of Low Energy X-ray Imaging Sensors

An artist's impression of the ALEXIS satelllite

An artist's conception of the Alexis satellite in oribt. (Credit: DOE)

Lifetime: April 1993 - April 2005

Country (primary): United States

Primary Science

The Array of Low Energy X-ray Imaging Sensors, or Alexis, satellite was a small satellite. Alexis carried an ultrasoft X-ray telescope array for astronomy studies. It also carried instrumentation to test the feasibility of quickly building low-cost sensors for arms treaty verification.

Science Highlights

  • Mapped the diffuse X-ray backgroun in three emission line bands
  • Performed a narrow-band survey of X-ray point sources

Links to more information


A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

NASA Logo, National Aeronautics and Space Administration