Multibeam Blind Search of Targeted SETI Observations toward 33 Exoplanet Systems with FAST

Abstract

The search for extraterrestrial intelligence (SETI) is to search for technosignatures associated with extraterrestrial life, such as engineered radio signals. In this paper, we apply the multibeam coincidence matching (MBCM) strategy, and propose a new search mode based on the MBCM which we call MBCM blind search mode. In our recent targeted SETI research, 33 exoplanet systems are observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). With this blind search mode, we search for narrowband drifting signals across $1.05-1.45$ GHz in two orthogonal linear polarization directions separately. There are two special signals, one of which can only be detected by the blind search mode while the other can be found by both blind and targeted search modes. This result reveals huge advantages of the new blind search mode. However, we eliminate the possibility of the special signals being ETI signals based on much evidence, such as the polarization, drift, frequency and beam coverage characteristics. Our observations achieve an unprecedented sensitivity and our work provides a deeper understanding to the polarization analysis of extraterrestrial signals.

15 pages, 1 table, 7 figures. Matches AJ published version. Based on MBCM strategy by Zhen-Zhao Tao et al (2022 AJ 164 160), we propose a new search mode: MBCM blind search mode for FAST SETI observations

References in corpus (14)

• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• Exploring Exoplanet Populations with NASA's Kepler Mission
• The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) Project
• The SUrvey for Pulsars and Extragalactic Radio Bursts I: Survey Description and Overview
• The Breakthrough Listen Search For Intelligent Life Near the Galactic Center I
• A Fast Radio Burst discovered in FAST drift scan survey
• A Search for Technosignatures Around 31 Sun-like Stars with the Green Bank Telescope at 1.15-1.73 GHz
• A radio technosignature search towards Proxima Centauri resulting in a signal-of-interest
• An Opportunistic Search for ExtraTerrestrial Intelligence (SETI) with the Murchison Widefield Array
• 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
• Drift Rates of Narrowband Signals in Long-term SETI Observations for Exoplanets
• Sensitive Multi-beam Targeted SETI Observations towards 33 Exoplanet Systems with FAST
• Past, Present and Future Stars that can see Earth as a Transiting Exoplanet
• A SETI Survey of the Vela Region using the Murchison Widefield Array: Orders of Magnitude Expansion in Search Space

Cited by in corpus (12)

• The most sensitive SETI observations toward Barnard's star with FAST
• A solution to continuous RFI in narrowband radio SETI with FAST: The MultiBeam Point-source Scanning strategy
• Multibeam SETI Observations toward Nearby M dwarfs with FAST
• Polarization Criterion in Targeted SETI Observation
• SETI@home: Data Analysis and Findings
• The FAST-SETI Milky Way Globular Cluster Survey I: A Pilot Multibeam On-the-Fly Search of Five Globular Clusters at L-Band
• Theoretical Radio Signals from Radio-Band Gravitational Waves Converted from the Neutron Star Magnetic Field
• Estimating Cosmological Parameters and Reconstructing Hubble Constant with Artificial Neural Networks: A Test with covariance matrix and mock H(z)
• Dual-Backend Multibeam Position Switching Targeted SETI Observations toward Nearby Active Planet-Hosting Systems with FAST
• SETI@home: Data Acquisition and Front-End Processing
• Undetected past contacts with technological species: implications for technosignature science
• An Improved Machine Learning Approach for Radio Frequency Interference Mitigation in FAST-SETI Survey Archival Data