The Breakthrough Listen Search for Intelligent Life: A 3.95–8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone

  title={The Breakthrough Listen Search for Intelligent Life: A 3.95–8.00 GHz Search for Radio Technosignatures in the Restricted Earth Transit Zone},
  author={Sofia Z. Sheikh and Andrew P. V. Siemion and J. Emilio Enriquez and Danny C. Price and Howard T. Isaacson and Matt Lebofsky and Vishal Gajjar and Paul Kalas},
  journal={The Astronomical Journal},
We report on a search for artificial narrowband signals of 20 stars within the restricted Earth Transit Zone (rETZ) as a part of the ten-year Breakthrough Listen (BL) search for extraterrestrial intelligence (ETI). The rETZ is the region of the sky from which an observer would see Earth transit the Sun with an impact parameter of less than 0.5. This region of the sky is geometrically unique, providing a potential way for an ETI to discover the solar system. The targets were nearby (7–143 pc… 

Breakthrough Listen Search for Technosignatures toward the Kepler-160 System

A search for artificial radio emission associated with the Kepler-160 system following the report of the discovery of the Earth-like planet candidate KOI-456 found no candidates were identified above an upper limit Equivalent Isotropic Radiated Power (EIRP) of $5.9 W.

A SETI survey of the Vela region using the Murchison Widefield Array: Orders of magnitude expansion in search space

Abstract Following the results of our previous low-frequency searches for extraterrestrial intelligence (SETI) using the Murchison Widefield Array (MWA), directed towards the Galactic Centre and the

Which stars can see Earth as a transiting exoplanet?

Transit observations have found the majority of exoplanets to date. Spectroscopic observations of transits and eclipses are the most commonly used tool to characterize exoplanet atmospheres and will

Strategies for the Detection of ET Probes Within Our Own Solar System.

A number of strategies to detect local ET probes are suggested, most notably sacrificing sensitivity in exchange for a widened field-of-view.

Planck frequencies as Schelling points in SETI

  • J. Wright
  • Physics
    International Journal of Astrobiology
  • 2020
A ‘Planck Frequency Comb’ is constructed by multiplying the Planck energy by integer powers of the fine structure constant in regions of the electromagnetic spectrum where laser and radio SETI typically operates, suggesting that it may be fruitful to search for signals arriving in frequency combs of arbitrary spacing.

Detecting Planet 9 via Hawking radiation

Concordant evidence points towards the existence of a ninth planet in the Solar System at more than $400\,$AU from the Sun. In particular, trans-Neptunian object orbits are perturbed by the presence

Narrow-band Signal Localization for SETI on Noisy Synthetic Spectrogram Data

This work generates two synthetic data sets resembling data collected by Breakthrough Listen using the Green Bank Telescope, and finds that a residual CNN with strided convolutions and using multiple image normalizations as input outperforms a more basic CNN with max pooling trained on inputs with only one normalization.

S1473550420000221jra 446..455

  • 2020

The Breakthrough Listen Search for Intelligent Life: Technosignature Search of Transiting TESS Targets of Interest

The Breakthrough Listen (BL) Initiative, as part of its larger mission, is performing the most thorough technosignature search of nearby stars. Additionally, BL is collaborating with scientists

Sensitive Multibeam Targeted SETI Observations toward 33 Exoplanet Systems with FAST

As a major approach to looking for life beyond the Earth, the search for extraterrestrial intelligence (SETI) is committed to searching for technosignatures such as engineered radio signals that are



The Breakthrough Listen Search for Intelligent Life: Observations of 1327 Nearby Stars Over 1.10–3.45 GHz

Breakthrough Listen (BL) is a 10 year initiative to search for signatures of technologically capable life beyond Earth via radio and optical observations of the local universe. A core part of the BL

The Breakthrough Listen Search for Intelligent Life: 1.1–1.9 GHz Observations of 692 Nearby Stars

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 Breakthrough Listen Initiative search for

The Breakthrough Listen Search for Intelligent Life: A Wideband Data Recorder System for the Robert C. Byrd Green Bank Telescope

Details of the system architecture, along with salient configuration and disk-write optimizations used to achieve high-throughput data capture on commodity compute servers and consumer-class hard disk drives are presented.

The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies

We present the target selection for the Breakthrough Listen search for extraterrestrial intelligence during the first year of observations at the Green Bank Telescope, Parkes Telescope, and Automated

The Breakthrough Listen Search for Intelligent Life: Public Data, Formats, Reduction, and Archiving

The hardware and software pipeline used for collection, reduction, archival, and public dissemination of Listen data is described, the data formats and tools are described, andBLDR 1.0 is presented, a defined set of publicly-available raw and reduced data totalling 1 PB.


We present a targeted search for narrow-band (<5 Hz) drifting sinusoidal radio emission from 86 stars in the Kepler field hosting confirmed or candidate exoplanets. Radio emission less than 5 Hz in

A VLA Search for Radio Signals from M31 and M33

Observing nearby galaxies would facilitate the search for artificial radio signals by sampling several billions of stars simultaneously, but few efforts have been made to exploit this opportunity. An

Transit Light-Curve Signatures of Artificial Objects

The forthcoming space missions, able to detect Earth-like planets by the transit method, will a fortiori also be able to detect the transits of artificial planet-sized objects. Multiple artificial

KEPLER: Search for Earth-Size Planets in the Habitable Zone

Abstract The Kepler Mission is a space-based mission whose primary goal is to determine the frequency of Earth-size and larger planets in the habitable zone of solar-like stars. The mission will