Breakthrough Listen Observations of 3I/ATLAS with the Green Bank Telescope at 1-12 GHz
Ben Jacobson-Bell, Steve Croft, Ellie White, Andrew P. V. Siemion, Matthew Lebofsky, David H. E. MacMahon
TL;DR
This study reports a comprehensive search for technosignatures from interstellar object 3I/ATLAS using the Green Bank Telescope across 1-12 GHz, finding no candidate signals at the sensitivity level of 100 mW.
Contribution
It presents the first targeted technosignature search of 3I/ATLAS during its close approach, utilizing the Green Bank Telescope at multiple frequencies.
Findings
No candidate signals detected at 100 mW sensitivity.
First dedicated technosignature search for 3I/ATLAS.
Provides constraints on potential extraterrestrial signals.
Abstract
3I/ATLAS, an interstellar object, made its closest approach to Earth on 2025 December 19. On 2025 December 18, the Breakthrough Listen program conducted a technosignature search toward 3I/ATLAS using the 100 m Robert C. Byrd Green Bank Telescope at 1-12 GHz. We report a nondetection of candidate signals down to the 100 mW level.
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Taxonomy
TopicsRadio Astronomy Observations and Technology · Astrophysics and Cosmic Phenomena · Superconducting and THz Device Technology