Project Sentinel: Ultra-Narrowband SETI at Harvard/Smithsonian

  • Paul Horowitz
  • John Forster
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 112)


We have been searching the northern sky for ultra-narrowband carriers of intelligent extraterrestrial origin at 21cm wavelength. The dual-polarization 65,536-channel receiver has a resolution bandwidth of 0.03Hz, matched to the Drake-Helou spreading of the interstellar medium. This maximizes signal/noise ratio, and simultaneously rejects carriers of terrestrial origin. The results of 15 months of observation are summarized.


False Alarm Doppler Shift Interstellar Medium Galactic Center Resolution Bandwidth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© International Astronomical Union 1985

Authors and Affiliations

  • Paul Horowitz
    • 1
  • John Forster
    • 2
  1. 1.Department of PhysicsHarvard UniversityCambridgeUSA
  2. 2.MIT Branch Post OfficeCambridgeUSA

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