Shi Dai^17,15, Yi Feng¹⁸, Boris Goncharov^4,5, George Hobbs¹⁵, Eric Howard^15,19, Richard N. Manchester¹⁵, Aditya Parthasarathy^16,20, Daniel J. Reardon^5,16, Christopher J. Russell²¹, Ryan M. Shannon^5,16, Renée Spiewak^16,22, Nithyanandan Thyagarajan²³, Jingbo Wang²⁴, Lei Zhang²⁵, and Songbo Zhang²⁶ (PPTA Collaboration)

• ¹II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
• ²Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
• ³Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai 519087, China
• ⁴School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
• ⁵OzGrav: The ARC Centre of Excellence for Gravitational Wave Discovery, Hawthorn, Victoria 3122, Australia
• ⁶Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
• ⁷CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
• ⁸School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
• ⁹CAS Center for Excellence in Particle Physics, Beijing 100049, China
• ¹⁰Center for High Energy Physics, Peking University, Beijing 100871, China
• ¹¹School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
• ¹²International Centre for Theoretical Physics Asia-Pacific, Beijing/Hangzhou, China
• ¹³School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, China
• ¹⁴International Centre for Radio Astronomy Research, Curtin University, Bentley, Western Australia 6102, Australia
• ¹⁵Australia Telescope National Facility, CSIRO Astronomy and Space Science, Epping, New South Wales 1710, Australia
• ¹⁶Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
• ¹⁷School of Science, Western Sydney University, Locked Bag 1797, Penrith South DC, NSW 2751, Australia
• ¹⁸Research Institute of Artificial Intelligence, Zhejiang Lab, Hangzhou, Zhejiang 311121, China
• ¹⁹Macquarie University, Department of Physics and Astronomy, Sydney, New South Wales 2109, Australia
• ²⁰Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
• ²¹CSIRO Scientific Computing, Australian Technology Park, Alexandria, New South Wales 1435, Australia
• ²²Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, United Kingdom
• ²³National Radio Astronomy Observatory, Socorro, New Mexico 87801, USA
• ²⁴Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
• ²⁵School of Physics and Technology, Wuhan University, Wuhan 430072, China
• ²⁶Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China

• ^*Corresponding author: jshu@itp.ac.cn
• ^†Corresponding author: yuanq@pmo.ac.cn