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Verification of Radiative Transfer Schemes for The The Astrophysical Journal, 897:148 (21pp), 2020 July 10 https://doi.org/10.3847/1538-4357/ab96c6 © 2020. The American Astronomical Society. All rights reserved. Verification of Radiative Transfer Schemes for the EHT Roman Gold1,2,3 , Avery E. Broderick3,4,5 , Ziri Younsi2,6 , Christian M. Fromm2, Charles F. Gammie7 , Monika Mościbrodzka8 , Hung-Yi Pu3 , Thomas Bronzwaer8 , Jordy Davelaar8 , Jason Dexter9 , David Ball10, Chi-kwan Chan10,11 , Tomohisa Kawashima12 , Yosuke Mizuno2 , Bart Ripperda13,14 , Kazunori Akiyama12,15,16,17 , Antxon Alberdi18 , Walter Alef19, Keiichi Asada20, Rebecca Azulay19,21,22 , Anne-Kathrin Baczko19 , Mislav Baloković17,23 , John Barrett16 , Dan Bintley24, Lindy Blackburn17,23 , Wilfred Boland25, Katherine L. Bouman17,23,26 , Geoffrey C. Bower27 , Michael Bremer28, Christiaan D. Brinkerink8 , Roger Brissenden17,23 , Silke Britzen19 , Dominique Broguiere28, Do-Young Byun29,30 , John E. Carlstrom31,32,33,34, Andrew Chael35,107 , Koushik Chatterjee36 , Shami Chatterjee37 , Ming-Tang Chen27, Yongjun Chen (陈永军)38,39, Ilje Cho29,30 , Pierre Christian10,23 , John E. Conway40 , James M. Cordes37 , Geoffrey B. Crew16 , Yuzhu Cui41,42 , Mariafelicia De Laurentis2,43,44 , Roger Deane45,46 , Jessica Dempsey24 , Gregory Desvignes19,47 , Sheperd S. Doeleman17,23 , Ralph?P. Eatough19 , Heino Falcke8 , Vincent L. Fish16 , Ed Fomalont15, Raquel Fraga-Encinas8 , Bill Freeman48,49, Per Friberg24, José L. Gómez18 , Peter Galison17,50,51 , Roberto García28, Olivier Gentaz28, Boris Georgiev4,5 , Ciriaco Goddi8,52, Minfeng Gu (顾敏峰)38,53 , Mark Gurwell23 , Kazuhiro Hada41,42 , Michael H. Hecht16, Ronald Hesper54 , Luis C. Ho (何子山)55,56 , Paul Ho20, Mareki Honma41,42 , Chih-Wei L. Huang20 , Lei Huang (黄磊)38,53 , David H. Hughes57, Makoto Inoue20, Sara Issaoun8 , David J. James17,23 , Buell T. Jannuzi10, Michael Janssen8 , Britton Jeter4 , Wu Jiang (江悟)38 , Alejandra Jimenez-Rosales58, Michael D. Johnson17,23 , Svetlana Jorstad59,60 , Taehyun Jung29,30 , Mansour Karami3,61 , Ramesh Karuppusamy19 , Garrett K. Keating23 , Mark Kettenis62 , Jae-Young Kim19 , Junhan Kim10,26 , Jongsoo Kim29, Motoki Kino12,63 , Jun Yi Koay20 , Patrick M. Koch20 , Shoko Koyama20 , Michael Kramer19 , Carsten Kramer28 , Thomas P. Krichbaum19 , Cheng-Yu Kuo64 , Tod R. Lauer65 , Sang-Sung Lee29 , Yan-Rong Li (李彦荣)66 , Zhiyuan Li (李志远)67,68 , Rocco Lico19 , Michael Lindqvist40, Kuo Liu19 , Elisabetta Liuzzo69 , Wen-Ping Lo20,70 , Andrei P. Lobanov19, Laurent Loinard71,72 , Colin Lonsdale16, Ru-Sen Lu (路如森)19,38,39 , Nicholas R. MacDonald19 , Sera Markoff73 , Jirong Mao (毛基荣)74,75,76 , Daniel P. Marrone10 , Alan P. Marscher59 , Iván Martí-Vidal77 , Satoki Matsushita20, Lynn D. Matthews16 , Lia Medeiros10,78 , Karl M. Menten19 , Izumi Mizuno24 , James M. Moran17,23 , Kotaro Moriyama41 , Cornelia Müller8,19 , Hiroshi Nagai79,80 , Masanori Nakamura20 , Neil M. Nagar81 , Ramesh Narayan17,23 , Gopal Narayanan82, Iniyan Natarajan46 , Roberto Neri28 , Chunchong Ni4 , Aristeidis Noutsos19 , Hiroki Okino41,83, Gisela N. Ortiz-León19 , Tomoaki Oyama41, Feryal Özel10, Daniel C. M. Palumbo17,23 , Jongho Park20 , Nimesh Patel23, Ue-Li Pen3,84,85,86 , Dominic W. Pesce17,23 , Richard Plambeck87 , Vincent Piétu28, Aleksandar PopStefanija82, Oliver Porth2,36 , Jorge A. Preciado-López3 , Dimitrios Psaltis10 , Venkatessh Ramakrishnan81 , Ramprasad Rao27 , Mark G. Rawlings24, Alexander W. Raymond17,23 , Luciano Rezzolla2,88 , Freek Roelofs8 , Alan Rogers16, Eduardo Ros19 , Mel Rose10 , Arash Roshanineshat10, Helge Rottmann19, Alan L. Roy19 , Chet Ruszczyk16 , Kazi L. J. Rygl69 , Salvador Sánchez89, David Sánchez-Arguelles57,90 , Mahito Sasada41,91 , Tuomas Savolainen19,92,93 , Karl-Friedrich Schuster28, F. Peter Schloerb82, Lijing Shao19,56 , Zhiqiang Shen (沈志强)38,39 , Des Small62 , Bong Won Sohn29,30,94 , Jason SooHoo16 , Paul Tiede3,4 , Fumie Tazaki41 , Remo P. J. Tilanus8,52,95 , Michael Titus16 , Kenji Toma96,97 , Pablo Torne19,89 , Tyler Trent10, Thalia Traianou19 , Sascha Trippe98 , Shuichiro Tsuda99, Huib Jan van Langevelde62,100 , Ilse van Bemmel62 , Daniel R. van Rossum8 , Jan Wagner19, John Wardle101 , Norbert Wex19, Jonathan Weintroub17,23 , Robert Wharton19 , Maciek Wielgus17,23 , George N. Wong102,103 , Qingwen Wu (吴庆文)104 , Doosoo Yoon36 , Ken Young23 , André Young8 , Feng Yuan (袁峰)38,53,105 , Ye-Fei Yuan (袁业飞)106, J. Anton Zensus19 , Guangyao Zhao29 , Shan-Shan Zhao38 , and Ziyan Zhu51 (The Event Horizon Telescope Collaboration) 1 CP3-Origins, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark; [email protected] 2 Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Straße 1, D-60438 Frankfurt am Main, Germany 3 Perimeter Institute for Theoretical Physics, 31 Caroline Street North, Waterloo, ON, N2L 2Y5, Canada 4 Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada 5 Waterloo Centre for Astrophysics, University of Waterloo, Waterloo, ON N2L 3G1, Canada 6 Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK 7 Department of Astronomy; Department of Physics; University of Illinois, Urbana, IL 61801, USA 8 Department of Astrophysics, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands 9 JILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA 10 Steward Observatory and Department of Astronomy, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA 11 Data Science Institute, University of Arizona, 1230 N. Cherry Ave., Tucson, AZ 85721, USA 12 National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 13 Center for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA 14 Department of Astrophysical Sciences, Peyton Hall, Princeton University, Princeton, NJ 08544, USA 15 National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA 16 Massachusetts Institute of Technology Haystack Observatory, 99 Millstone Road, Westford, MA 01886, USA 17 Black Hole Initiative at Harvard University, 20 Garden Street, Cambridge, MA 02138, USA 1 The Astrophysical Journal, 897:148 (21pp), 2020 July 10 Gold et al. 18 Instituto de Astrofísica de Andalucía—CSIC, Glorieta de la Astronomía s/n, E-18008 Granada, Spain 19 Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany; [email protected] 20 Institute of Astronomy and Astrophysics, Academia Sinica, 11F of Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Rd, Taipei 10617, Taiwan, R.O.C. 21 Departament d’Astronomia i Astrofísica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, Spain 22 Observatori Astronòmic, Universitat de València, C. Catedrático José Beltrán 2, E-46980 Paterna, València, Spain 23 Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA 24 East Asian Observatory, 660 N. A’ohoku Pl., Hilo, HI 96720, USA 25 Nederlandse Onderzoekschool voor Astronomie (NOVA), P.O. Box 9513, 2300 RA Leiden, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands 26 California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA 27 Institute of Astronomy and Astrophysics, Academia Sinica, 645 N. A’ohoku Place, Hilo, HI 96720, USA 28 Institut de Radioastronomie Millimétrique, 300 rue de la Piscine, F-38406 Saint Martin d’Hères, France 29 Korea Astronomy and Space Science Institute, Daedeok-daero 776, Yuseong-gu, Daejeon 34055, Republic of Korea 30 University of Science and Technology, Gajeong-ro 217, Yuseong-gu, Daejeon 34113, Republic of Korea 31 Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA 32 Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637, USA 33 Department of Physics, University of Chicago, Chicago, IL 60637, USA 34 Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA 35 Princeton Center for Theoretical Science, Jadwin Hall, Princeton University, Princeton, NJ 08544, USA 36 Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands 37 Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY 14853, USA 38 Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China 39 Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, People’s Republic of China 40 Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden 41 Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-12 Hoshigaoka, Mizusawa, Oshu, Iwate 023-0861, Japan 42 Department of Astronomical Science, The Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan 43 Dipartimento di Fisica “E. Pancini,” Universitá di Napoli “Federico II,” Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli, Italy 44 INFN Sez. di Napoli, Compl. Univ. di Monte S. Angelo, Edificio G, Via Cinthia, I-80126, Napoli, Italy 45 Department of Physics, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0083, South Africa 46 Centre for Radio Astronomy Techniques and Technologies, Department of Physics and Electronics, Rhodes University, Grahamstown 6140, South
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