GBT25B-302

A search for technosignatures around sun-like stars

Abstract

We request ten (10) hours of GBT time spread over five consecutive semesters (2025B-2027B) to conduct an L-band search for technosignatures around 80 G-type stars and over 100,000 additional stars that are also likely to host planetary systems. We will search for narrowband (<10 Hz) signals from extraterrestrial emitters in previously unexplored slices of the SETI search volume, and we will preserve the raw voltage data in order to enable additional search strategies in the future. This GBT search is a high-risk, high-reward investigation that offers the prospect of an unambiguous detection of another form of life in the universe, without the natural confounders that complicate biosignature searches. We request the GBT to enable sensitivity to transmitters with an Arecibo-class EIRP (2.2e13 W)) located within 415 ly of Earth and to transmitters with 4130 times Arecibo's EIRP located at the galactic center. These observations also enable a citizen science collaboration with over 30,000 volunteers so far and an annual SETI course that has been taught to 165 UCLA undergraduate and graduate students so far.

Investigators

Name	Institution
Megan Li	California at Los Angeles, University of
Jean-Luc Margot *	California at Los Angeles, University of
Ryan Lynch	Green Bank Observatory

* indicates the PI