Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai, People’s Republic of China
Ru-Sen Lu, Feng Yuan, Wu Jiang, Zhi-Qiang Shen & Hai Yang
Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing, People’s Republic of China
Ru-Sen Lu & Zhi-Qiang Shen
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Ru-Sen Lu, Thomas P. Krichbaum, Andrei Lobanov, Jae-Young Kim, Eduardo Ros, Walter Alef, Silke Britzen, Jun Liu, Helge Rottmann, Tuomas Savolainen, J. Anton Zensus, Uwe Bach, Sven Dornbusch, Alex Kraus, Nicholas MacDonald, Yurii Pidopryhora, Efthalia Traianou & Jan Wagner
Institute of Astronomy and Astrophysics, Academia Sinica, Taipei, Taiwan, ROC
Keiichi Asada, Jongho Park, Hung-Yi Pu, Masanori Nakamura, Paul T. P. Ho, Makoto Inoue, Shoko Koyama, Satoki Matsushita, Shu-Hao Chang, Chung-Chen Chen, Chih-Chiang Han, Yau-De Huang, Chih-Wei L. Huang, Homin Jiang, Jun Yi Koay, Patrick M. Koch, Chao-Te Li, Ching-Tang Liu, Kuan-Yu Liu, Wen-Ping Lo, Pierre Martin-Cocher, Zheng Meyer-Zhao, Hiroaki Nishioka, Ue-Li Pen, Nicolas Pradel, Paul Shaw, Ranjani Srinivasan, Ta-Shun Wei & Chen-Yu Yu
Korea Astronomy and Space Science Institute, Daejeon, Republic of Korea
Jongho Park, Jae-Young Kim, Do-Young Byun & Taehyun Jung
Simulation Technology Development Department, Tokyo Electron Technology Solutions, Oshu, Japan
Fumie Tazaki
Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, Oshu, Japan
Fumie Tazaki, Kazuhiro Hada & Mareki Honma
Department of Physics, National Taiwan Normal University, Taipei, Taiwan, ROC
Hung-Yi Pu
Center of Astronomy and Gravitation, National Taiwan Normal University, Taipei, Taiwan, ROC
Hung-Yi Pu
Department of General Science and Education, National Institute of Technology, Hachinohe College, Hachinohe City, Japan
Masanori Nakamura
Department of Astronomical Science, The Graduate University for Advanced Studies, SOKENDAI, Mitaka, Japan
Kazuhiro Hada, Mareki Honma & Hiroshi Nagai
Black Hole Initiative, Harvard University, Cambridge, MA, USA
Kazunori Akiyama
Massachusetts Institute of Technology Haystack Observatory, Westford, MA, USA
Kazunori Akiyama & Geoffrey B. Crew
National Astronomical Observatory of Japan, Mitaka, Japan
Kazunori Akiyama, Motoki Kino & Hiroshi Nagai
Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu, Republic of Korea
Jae-Young Kim
Departament d’Astronomia i Astrofísica, Universitat de València, Valencia, Spain
Ivan Marti-Vidal
Observatori Astronòmic, Universitat de València, Valencia, Spain
Ivan Marti-Vidal
Instituto de Astrofísica de Andalucía–CSIC, Granada, Spain
José L. Gómez & Efthalia Traianou
Institute for Cosmic Ray Research, The University of Tokyo, Chiba, Japan
Tomohisa Kawashima
Key Laboratory for Research in Galaxies and Cosmology, Chinese Academy of Sciences, Shanghai, People’s Republic of China
Feng Yuan
School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing, People’s Republic of China
Feng Yuan & Hai Yang
Institut de Radioastronomie Millimétrique, Saint Martin d’Hères, France
Michael Bremer, Karl-Friedrich Schuster & Carsten Kramer
Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada
Avery E. Broderick
Waterloo Centre for Astrophysics, University of Waterloo, Waterloo, Ontario, Canada
Avery E. Broderick
Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada
Avery E. Broderick
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
Akihiro Doi
Department of Space and Astronautical Science, The Graduate University for Advanced Studies, SOKENDAI, Sagamihara, Japan
Akihiro Doi
Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
Gabriele Giovannini
Istituto di Radio Astronomia, INAF, Bologna, Italy
Gabriele Giovannini & Marcello Giroletti
Department of Astronomy, Graduate School of Science, The University of Tokyo, Tokyo, Japan
Mareki Honma
Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico
David H. Hughes
Academic Support Center, Kogakuin University of Technology and Engineering, Hachioji, Japan
Motoki Kino
Graduate School of Science and Technology, Niigata University, Niigata, Japan
Shoko Koyama
Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, Onsala, Sweden
Michael Lindqvist, John Conway & Jun Yang
Institute for Astrophysical Research, Boston University, Boston, MA, USA
Alan P. Marscher
Department of Electronics and Nanoengineering, Aalto University, Aalto, Finland
Tuomas Savolainen
Metsähovi Radio Observatory, Aalto University, Kylmälä, Finland
Tuomas Savolainen, Juha Kallunki & Petri Kirves
Observatorio de Yebes, IGN, Yebes, Spain
Pablo de Vicente, Javier González García, Miguel Gómez Garrido & Belén Tercero
National Radio Astronomy Observatory, Socorro, NM, USA
R. Craig Walker
Department of Physics, Faculty of Science, Universiti Malaya, Kuala Lumpur, Malaysia
Juan Carlos Algaba
University of Vermont, Burlington, VT, USA
Alexander Allardi
East Asian Observatory, Hilo, HI, USA
Ryan Berthold, Dan Bintley, Tim C. Chuter, Jessica T. Dempsey, Per Friberg & Craig Walther
University of Science and Technology, Daejeon, Republic of Korea
Do-Young Byun
Institute of Astrophysics, Foundation for Research and Technology, Heraklion, Greece
Carolina Casadio
Department of Physics, University of Crete, Heraklion, Greece
Carolina Casadio
System Development Center, National Chung-Shan Institute of Science and Technology, Taoyuan, Taiwan, ROC
Chih-Cheng Chang, Song-Chu Chang, Kuo-Chang Han & Li-Ming Lu
Institute of Astronomy and Astrophysics, Academia Sinica, Hilo, HI, USA
Ming-Tang Chen, Ryan Chilson, Derek Kubo, George Nystrom, Peter Oshiro, Philippe A. Raffin & William Snow
ASTRON, Dwingeloo, The Netherlands
Jessica T. Dempsey & Zheng Meyer-Zhao
Western University, London, Ontario, Canada
Aaron Faber
Graduate School of Science, Osaka Metropolitan University, Osaka, Japan
Yutaka Hasegawa & Hideo Ogawa
European Southern Observatory, Santiago, Chile
Ruben Herrero-Illana & Hugo Messias
Leiden Observatory, University of Leiden, Leiden, The Netherlands
Violette Impellizzeri
National Radio Astronomy Observatory, Charlottesville, VA, USA
Violette Impellizzeri & T. K. Sridharan
Electronic Systems Research Division, National Chung-Shan Institute of Science and Technology, Taoyuan, Taiwan, ROC
Hao Jinchi
Japan Aerospace Exploration Agency, Tsukuba, Japan
Kimihiro Kimura
Department of Physics, National Sun Yat-Sen University, Kaohsiung City, Taiwan, ROC
Cheng-Yu Kuo
Department of Physics, National Cheng Kung University, Tainan, Taiwan, ROC
Lupin Chun-Che Lin
Department of Physics, National Taiwan University, Taipei, Taiwan, ROC
Wen-Ping Lo
Joint ALMA Observatory, Santiago, Chile
Hugo Messias
Green Bank Observatory, Green Bank, WV, USA
Anthony Minter
Astronomy Department, Universidad de Concepción, Concepción, Chile
Dhanya G. Nair
Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA, USA
Timothy J. Norton, Nimesh A. Patel, Ramprasad Rao, T. K. Sridharan & Ranjani Srinivasan
Argelander-Institut für Astronomie, Universität Bonn, Bonn, Germany
Yurii Pidopryhora
Institut de Radioastronomie Millimétrique, Granada, Spain
Ignacio Ruiz, Salvador Sanchez & Pablo Torne
R.-S.L., K. Asada, T.P.K. and K.H. initiated the project and coordinated the research. P.H., M.I., M.-T.C., S.M., K. Asada, P.M.K., Y.-D.H., C.-C.H., D.K., P.A.R., T.J.N., N.A.P. and other engineers and technicians in East Asia made the GLT available for our observations. K. Asada, T.P.K., R.-S.L., I.M.-V., J.P. and E.R. worked on the VLBI scheduling and coordination of the observations, analysis and calibration of the data. K. Akiyama, K. Asada, K.H., J.-Y. Kim, T.P.K., R.-S.L., J.P., F.T. and A.L. worked on image reconstruction and model fitting. K. Asada, J.L.G., K.H., J.-Y. Kim, T.P.K., T.K., A.L., R.-S.L., M.N., J.P., H.-Y.P. and F.Y. worked on the scientific interpretation of the results. All authors approved the paper and contributed to writing the observing proposal, carried out the observations, produced and/or applied software tools for analysis and interpretation, and contributed to the general interpretation of the data.
