Zhang'
- Dan Werthimer
- 'Tong-Jie Zhang'
- Jeff Cobb
- Eric Korpela
- David Anderson
- Vishal Gajjar
- Ryan Lee
- 'Shi-Yu Li'
- Xin Pei
- 'Xin-Xin Zhang'
- 'Shi-Jie Huang'
- Pei Wang
- Yan Zhu
- Ran Duan
- 'Hai-Yan Zhang'
- 'Cheng-jin Jin'
- 'Li-Chun Zhu'
- Di Li
bibliography:
- 'references.bib'
title: 'First SETI Observations with China’s Five-hundred-meter Aperture Spherical radio Telescope (FAST)'
---

Introduction {#sec:intro}
============

The search for extraterrestrial intelligence (SETI), also known as the search for technosignatures [@tarter_2006; @2018arXiv180906857W], is a growing field in astronomy. This is partially due to the super-computer and big data revolution, machine learning technology, the privately-financed Breakthrough Listen Initiative, the thousands of recently discovered exoplanets, as well as the construction of new facilities, including FAST [@8331324].

“The probability of success is difficult to estimate, but if we never search the chance of success is zero” [@1959Natur.184..844C]. [@GrimaldiE9755] calculate the number of electromagnetic signals reaching Earth based on parameters from the Drake Equation. [@2016JCAP...08..040L] calculate the relative formation probability per unit time of habitable Earth-like planets within a fixed comoving volume of the Universe. They found that life in the Universe is most likely to exist 