Sensitive Multi-beam Targeted SETI Observations towards 33 Exoplanet Systems with FAST
Zhen-Zhao Tao, Hai-Chen Zhao, Tong-Jie Zhang, Vishal Gajjar, Yan Zhu,, You-Ling Yue, Hai-Yan Zhang, Wen-Fei Liu, Shi-Yu Li, Jian-Chen Zhang, Cong, Liu, Hong-Feng Wang, Ran Duan, Lei Qian, Cheng-Jin Jin, Di Li, Andrew, Siemion, Peng Jiang, Dan Werthime, Jeff Cobb, Eric Korpela

TL;DR
This study used FAST to conduct targeted SETI observations of 33 exoplanet systems, employing multi-beam coincidence matching to detect potential technosignatures, achieving high sensitivity and analyzing signals for extraterrestrial origin.
Contribution
It introduces a novel multi-beam coincidence matching strategy for SETI with FAST and provides the first high-sensitivity search across multiple exoplanet systems.
Findings
Detected a signal near 1140.604 MHz from Kepler-438, but likely terrestrial in origin.
Achieved unprecedented sensitivity with a minimum detectable EIRP of 1.48 x 10^9 W.
No confirmed extraterrestrial technosignatures were found.
Abstract
As a major approach to looking for life beyond the Earth, the search for extraterrestrial intelligence (SETI) is committed to detecting technosignatures such as engineered radio signals that are indicative of technologically capable life. In this paper, we report a targeted SETI campaign employing an observation strategy named multi-beam coincidence matching (MBCM) at the Five-hundred-meter Aperture Spherical radio Telescope (FAST) towards 33 known exoplanet systems, searching for ETI narrow-band drifting signals across 1.05-1.45 GHz in two orthogonal linear polarization directions separately. A signal at 1140.604 MHz detected from the observation towards Kepler-438 originally peaked our interest because its features are roughly consistent with assumed ETI technosignatures. However, evidences such as its polarization characteristics are almost able to eliminate the possibility of an…
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Taxonomy
TopicsSpace Science and Extraterrestrial Life · Radio Astronomy Observations and Technology · Planetary Science and Exploration
