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First SETI Observations with China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST)
Zhang,Zhi-Song1,2,3,4; Werthimer,Dan3,4; Zhang,Tong-Jie5; Cobb,Jeff3,4; Korpela,Eric3; Anderson,David3; Gajjar,Vishal3,4; Lee,Ryan4,6,7; Li,Shi-Yu5; Pei,Xin2,8; Zhang,Xin-Xin1; Huang,Shi-Jie1; Wang,Pei1; Zhu,Yan1; Duan,Ran1; Zhang,Hai-Yan1; Jin,Cheng-jin1; Zhu,Li-Chun1; Li,Di1,2,9
2020-03-10
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume891Issue:2
AbstractAbstract The Search for Extraterrestrial Intelligence (SETI) attempts to address the possibility of the presence of technological civilizations beyond the Earth. Benefiting from high sensitivity, large sky coverage, and an innovative feed cabin for China’s Five-hundred-meter Aperture Spherical radio Telescope (FAST), we performed SETI’s first observations with FAST’s newly commissioned 19 beam receiver; we report preliminary results in this paper. Using the data stream produced by the SERENDIP VI real-time multibeam SETI spectrometer installed at FAST, as well as its off-line data processing pipelines, we identify and remove four kinds of radio frequency interference (RFI): zone, broadband, multibeam, and drifting, utilizing the Nebula SETI software pipeline combined with machine-learning algorithms. After RFI mitigation, the Nebula pipeline identifies and ranks interesting narrowband candidate ET signals, scoring candidates by the number of times candidate signals have been seen at roughly the same sky position and same frequency, signal strength, proximity to a nearby star or object of interest, along with several other scoring criteria. We show four example candidate groups that demonstrate this RFI mitigation and candidate selection. This preliminary testing on FAST data helps to validate our SETI instrumentation techniques as well as our data processing pipeline.
KeywordAstrobiology Sky surveys Astronomical instrumentation
DOI10.3847/1538-4357/ab7376
Language英语
WOS IDIOP:0004-637X-891-2-ab7376
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/64385
Collection中国科学院国家天文台
Affiliation1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Space Sciences Laboratory, University of California Berkeley, Berkeley, CA 94720, USA
4.Department of Astronomy, University of California Berkeley, Berkeley, CA 94720, USA
5.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China
6.Department of Physics, University of California Berkeley, Berkeley, CA 94720, USA
7.Department of Computer Science, University of California Berkeley, Berkeley, CA 94720, USA
8.Xinjiang Astronomical Observatory, CAS, 150, Science 1-Street, Urumqi, Xinjiang 830011, People's Republic of China
9.CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang,Zhi-Song,Werthimer,Dan,Zhang,Tong-Jie,等. First SETI Observations with China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST)[J]. The Astrophysical Journal,2020,891(2).
APA Zhang,Zhi-Song.,Werthimer,Dan.,Zhang,Tong-Jie.,Cobb,Jeff.,Korpela,Eric.,...&Li,Di.(2020).First SETI Observations with China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST).The Astrophysical Journal,891(2).
MLA Zhang,Zhi-Song,et al."First SETI Observations with China’s Five-hundred-meter Aperture Spherical Radio Telescope (FAST)".The Astrophysical Journal 891.2(2020).
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