A radio technosignature search towards Proxima Centauri resulting in a signal-of-interest
arXiv:2111.08007 · doi:10.1038/s41550-021-01479-w
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.
arXiv comment14 pages, 4 figures (+3 supplementary figures). Published open-access in Nature Astronomy
References in corpus (24)
- Array Programming with NumPy
- Astropy: A Community Python Package for Astronomy
- A terrestrial planet candidate in a temperate orbit around Proxima Centauri
- A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
- The habitability of Proxima Centauri b II. Possible climates and Observability
- The habitability of Proxima Centauri b. I. Irradiation, rotation and volatile inventory from formation to the present
- An ultra-wide bandwidth (704 to 4032 MHz) receiver for the Parkes radio telescope
- The Breakthrough Listen Search for Intelligent Life: 1.1-1.9 GHz observations of 692 Nearby Stars
- The Breakthrough Starshot System Model
- Revisiting Proxima with ESPRESSO
- The Breakthrough Listen Search for Intelligent Life: Observations of 1327 Nearby Stars over 1.10-3.45 GHz
- The First Naked-Eye Superflare Detected from Proxima Centauri
- The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies
- A Flare-Type IV Burst Event from Proxima Centauri and Implications for Space Weather
- Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through FUV Observations
- The Breakthrough Listen Search For Intelligent Life Near the Galactic Center I
- The Breakthrough Listen Search for Intelligent Life: A 3.95-8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone
- Choosing a Maximum Drift Rate in a SETI Search: Astrophysical Considerations
- Analysis of the Breakthrough Listen signal of interest blc1 with a technosignature verification framework
- Probabilistic Constraints on the Mass and Composition of Proxima b
- Extending the Breakthrough Listen nearby star survey to other stellar objects in the field
- The Breakthrough Listen Search for Intelligent Life: Searching for Technosignatures in Observations of TESS Targets of Interest
- An Earth-like stellar wind environment for Proxima Centauri c
- A Search for Optical Laser Emission from Proxima Centauri
Cited by in corpus (17)
- Analysis of the Breakthrough Listen signal of interest blc1 with a technosignature verification framework
- Sensitive Multi-beam Targeted SETI Observations towards 33 Exoplanet Systems with FAST
- Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST
- A Green Bank Telescope search for narrowband technosignatures between 1.1-1.9 GHz during 12 Kepler planetary transits
- The most sensitive SETI observations toward Barnard's star with FAST
- COSMIC's Large-Scale Search for Technosignatures during the VLA sky Survey: Survey Description and First Results
- Simulation of the Earth's radio leakage from mobile towers as seen from selected nearby stellar systems
- An Interferometric SETI Observation of Kepler-111 b
- Multibeam SETI Observations toward Nearby M dwarfs with FAST
- Simulating high-time resolution radio-telescope observations
- Polarization Criterion in Targeted SETI Observation
- SETI in 2021
- Dual-Backend Multibeam Position Switching Targeted SETI Observations toward Nearby Active Planet-Hosting Systems with FAST
- Narrowband Radio Technosignature Search toward 3I/ATLAS with FAST
- An Improved Machine Learning Approach for Radio Frequency Interference Mitigation in FAST-SETI Survey Archival Data
- The VLA and High-Frequency SETI: Expanding the Search for Life
- Searching for technosignatures in exoplanetary systems with current and future missions