A Search for Technosignatures from 14 Planetary Systems in the Kepler Field with the Green Bank Telescope at 1.15–1.73 GHz

  title={A Search for Technosignatures from 14 Planetary Systems in the Kepler Field with the Green Bank Telescope at 1.15–1.73 GHz},
  author={Jean-Luc Margot and Adam H. Greenberg and Pavlo Pinchuk and Akshay Shinde and Yashaswi Alladi and Srinivas Prasad Mn and M. Oliver Bowman and C. Fisher and Szil{\'a}rd Gyalay and Willow McKibbin and B. J. Miles and Donald Nguyen and Conor Power and Namrata Ramani and Rashmi Raviprasad and J. V. Santana and Ryan S. Lynch},
  journal={The Astronomical Journal},
Analysis of Kepler mission data suggests that the Milky Way includes billions of Earth-sized planets in the habitable zone of their host stars. Current technology enables the detection of technosignatures emitted from a large fraction of the Galaxy. We describe a search for technosignatures that is sensitive to Arecibo-class transmitters located within ∼420 ly of Earth and transmitters that are 1000 times more effective than Arecibo within ∼13000 ly of Earth. Our observations focused on 14… 
A Search for Technosignatures from TRAPPIST-1, LHS 1140, and 10 Planetary Systems in the Kepler Field with the Green Bank Telescope at 1.15–1.73 GHz
As part of our ongoing search for technosignatures, we collected over three terabytes of data in 2017 May with the L-band receiver (1.15–1.73 GHz) of the 100 m diameter Green Bank Telescope. These
A Search for Technosignatures around 31 Sun-like Stars with the Green Bank Telescope at 1.15–1.73 GHz
An improved candidate signal detection procedure that relies on the topographic prominence of the signal power, which nearly doubles the signal detection count of some previously analyzed data sets is applied, as well as improvements to the data processing pipeline.
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
Choosing a Maximum Drift Rate in a SETI Search: Astrophysical Considerations
A radio transmitter that is accelerating with a non-zero radial component with respect to a receiver will produce a signal that appears to change its frequency over time. This effect, commonly
Observations within the Framework of SETI Program on RATAN-600 Telescope in 2015 and 2016
In 2015–2016 regular observations within the SETI program were carried out at the RATAN-600 radio telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. The aim of
Setigen: Simulating Radio Technosignatures for the Search for Extraterrestrial Intelligence
The goal of the search for extraterrestrial intelligence (SETI) is the detection of nonhuman technosignatures, such as technology-produced emission in radio observations. While many have speculated
The radio search for technosignatures in the decade 2020-2030
A modest budgetary increment can expand the search for life in the universe from primitive to complex life and from the solar neighborhood to the entire Galaxy.
Scientific rebuttals to ‘ancient aliens’ as popular alternatives to biblical history
Just as Christian apologists need to rebut the ‘alternative’ historical claims of The Book of Mormon, so they need to rebut claims about so-called ‘ancient aliens’. These claims offer people with a
Unbound Close Stellar Encounters in the Solar Neighborhood
  • B. Hansen
  • Physics, Geology
    The Astronomical Journal
  • 2022
We present a catalog of unbound stellar pairs, within 100 pc of the Sun, that are undergoing close, hyperbolic, encounters. The data are drawn from the GAIA EDR3 catalog, and the limiting factors are
A Machine Learning–based Direction-of-origin Filter for the Identification of Radio Frequency Interference in the Search for Technosignatures
This work designed and trained a CNN that can determine whether or not a signal detected in one scan is also present in another scan, and it is found that the CNN reduces the number of signals requiring visual inspection after the application of traditional DoO filters by a factor of 6–16 in nominal situations.


A 1.1-1.9 GHz SETI Survey of the Kepler Field. I. A Search for Narrow-band Emission from Select Targets
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
Five years of Project META - An all-sky narrow-band radio search for extraterrestrial signals
We have conducted a five-year search of the northern sky (delta between 30 and 60 deg) for narrow-band radio signals near the 1420 MHz line of neutral hydrogen, and its second harmonic, using an 8.4
Exploring exoplanet populations with NASA’s Kepler Mission
  • N. Batalha
  • Physics, Geology
    Proceedings of the National Academy of Sciences
  • 2014
The Kepler Mission has made significant progress measuring the prevalence of exoplanets orbiting within one astronomical unit of their host stars in support of the National Aeronautics and Space Administration’s long-term goal of finding habitable environments beyond the solar system.
KEPLER Mission: development and overview.
  • W. Borucki
  • Physics, Geology
    Reports on progress in physics. Physical Society
  • 2016
The Kepler Mission is a space observatory launched in 2009 by NASA to determine the frequency of Earth-size and larger planets in and near the habitable zone of Sun-like stars, the size and orbital distributions of these planets, and the types of stars they orbit.
We evaluated the planetary radar capabilities at Arecibo, the Goldstone 70 m DSS-14 and 34 m DSS-13 antennas, the 70 m DSS-43 antenna at Canberra, the Green Bank Telescope (GBT), and the Parkes Radio
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
Planetary radar astronomy
Radar is a powerful technique that has furnished otherwise unavailable information about solar system bodies for three decades. The advantages of radar in planetary astronomy result from: (1) the
Narrow polarized components in the OH 1612-MHz maser emission from supergiant OH-IR sources.
High-resolution OH 1612-MHz spectra are presented of the supergiant OH-IR sources VY CMa, VX Sgr, IRC 10420 and NML Cyg, showing the presence of magnetic fields strong enough to influence the outflow from the stars, and may help to explain some of the asymmetries which are seen in their circumstellar envelopes.
The Australia Telescope National Facility Pulsar Catalogue
A new and complete catalog of the main properties of the 1509 pulsars for which published information currently exists is compiled, which includes all spin-powered pulsars, as well as anomalous X-ray pulsars and soft gamma-ray repeaters showing coherent pulsed emission.
Digital elevation models of the Moon from Earth-based radar interferometry
The theoretical background, experimental setup, and processing techniques for a sequence of observations performed with the Goldstone Solar System Radar in 1997 are described, providing radar imagery and digital elevation models of the polar areas and other small regions at /spl sim/100 m spatial and /spl Sim/50 m height resolutions.