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      A radio technosignature search towards Proxima Centauri resulting in a signal-of-interest

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          Abstract

          The detection of life beyond Earth is an ongoing scientific endeavour, with profound implications. One approach, known as the search for extraterrestrial intelligence (SETI), seeks to find engineered signals (`technosignatures') that indicate the existence technologically-capable life beyond Earth. Here, we report on the detection of a narrowband signal-of-interest at ~982 MHz, recorded during observations toward Proxima Centauri with the Parkes Murriyang radio telescope. This signal, `BLC1', has characteristics broadly consistent with hypothesized technosignatures and is one of the most compelling candidates to date. Analysis of BLC1 -- which we ultimately attribute to being an unusual but locally-generated form of interference -- is provided in a companion paper (Sheikh et al., 2021). Nevertheless, our observations of Proxima Centauri are the most sensitive search for radio technosignatures ever undertaken on a star target.

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          Author and article information

          Journal
          15 November 2021
          Article
          10.1038/s41550-021-01479-w
          2111.08007
          ca6110ea-aa6f-4224-a371-9883d920ab8c

          http://creativecommons.org/licenses/by/4.0/

          History
          Custom metadata
          Nature Astronomy, vol 5, pgs 1148-1152 (2021)
          14 pages, 4 figures (+3 supplementary figures). Published open-access in Nature Astronomy
          astro-ph.IM astro-ph.EP physics.pop-ph

          Planetary astrophysics,General physics,Instrumentation & Methods for astrophysics

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