The Breakthrough Listen Search for Intelligent Life: 1.1-1.9 GHz observations of 692 Nearby Stars

Abstract

We report on a search for engineered signals from a sample of 692 nearby stars using the Robert C. Byrd Green Bank Telescope, undertaken as part of the $BreakthroughListenInitiative$ search for extraterrestrial intelligence. Observations were made over 1.1$-$1.9 GHz (L band), with three sets of five-minute observations of the 692 primary targets, interspersed with five-minute observations of secondary targets. By comparing the "ON" and "OFF" observations we are able to identify terrestrial interference and place limits on the presence of engineered signals from putative extraterrestrial civilizations inhabiting the environs of the target stars. During the analysis, eleven events passed our thresholding algorithm, but a detailed analysis of their properties indicates they are consistent with known examples of anthropogenic radio frequency interference. We conclude that, at the time of our observations, none of the observed systems host high-duty-cycle radio transmitters emitting between 1.1 and 1.9 GHz with an Equivalent Isotropic Radiated Power of $\sim 10^{13}$ W, which is readily achievable by our own civilization. Our results suggest that fewer than $\sim$ 0.1$\%$ of the stellar systems within 50 pc possess the type of transmitters searched in this survey.

ApJ. 13 pages, 7 figures, 4 tables. This version has a typo correction to Eq. (4)

References in corpus (16)

• LOFAR: The LOw-Frequency ARray
• Prevalence of Earth-size planets orbiting Sun-like stars
• The Occurrence Rate of Small Planets around Small Stars
• Biosignatures from Earth-Like Planets Around M Dwarfs
• Exploring Exoplanet Populations with NASA's Kepler Mission
• Feasibility Studies for the Detection of $O_2$ in an Earth-like Exoplanet
• Target Selection for SETI: 1. A Catalog of Nearby Habitable Stellar Systems
• A 1.1 to 1.9 GHz SETI Survey of the Kepler Field: I. A Search for Narrow-band Emission from Select Targets
• The Expanded Very Large Array
• Identifying Planetary Biosignature Impostors: Spectral Features of CO and O4 Resulting from Abiotic O2/O3 Production
• The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies
• Accurate Galactic 21-cm H I measurements with the NRAO Green Bank Telescope
• Scintillation-Induced Intermittency in SETI
• SETI Observations of Exoplanets with the Allen Telescope Array
• A VLA Search for Radio Signals from M31 and M33
• The Search for Extraterrestrial Intelligence in Earth's Solar Transit Zone

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