The Breakthrough Listen Search for Intelligent Life: A 3.95–8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone

@article{Sheikh2020TheBL,
  title={The Breakthrough Listen Search for Intelligent Life: A 3.95–8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone},
  author={Sofia Z. Sheikh and Andrew P. V. Siemion and J. Emilio Enriquez and Danny C. Price and Howard T. Isaacson and Matt Lebofsky and Vishal Gajjar and Paul Kalas},
  journal={The Astronomical Journal},
  year={2020},
  volume={160}
}
We report on a search for artificial narrowband signals of 20 stars within the restricted Earth Transit Zone (rETZ) as a part of the ten-year Breakthrough Listen (BL) search for extraterrestrial intelligence (ETI). The rETZ is the region of the sky from which an observer would see Earth transit the Sun with an impact parameter of less than 0.5. This region of the sky is geometrically unique, providing a potential way for an ETI to discover the solar system. The targets were nearby (7–143 pc… 

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