![]() ![]() In response, we developed three independent pipelines for phase calibration and fringe detection, each tailored to the specific needs of the EHT. The observations present challenges for existing data processing tools, arising from the rapid atmospheric phase fluctuations, wide recording bandwidth, and highly heterogeneous array. These global very long baseline interferometric observations include for the first time the highly sensitive Atacama Large Millimeter/submillimeter Array (ALMA) reaching an angular resolution of 25 μas, with characteristic sensitivity limits of ∼1 mJy on baselines to ALMA and ∼10 mJy on other baselines. We present the calibration and reduction of Event Horizon Telescope (EHT) 1.3 mm radio wavelength observations of the supermassive black hole candidate at the center of the radio galaxy M87 and the quasar 3C 279, taken during the 2017 April 5-11 observing campaign. Primiani, Kamal Souccar, Laura Vertatschitsch, Paul Yamaguchi Show 198 others Show less Folkers, Zheng Meyer-Zhao, Daniel Michalik, Andrew Nadolski, Hiroaki Nishioka, Nicolas Pradel, Rurik A. Anton Zensus, Guangyao Zhao, Shan Shan Zhao, Ziyan Zhu, Roger Cappallo, Joseph R. Wong, Qingwen Wu, André Young, Ken Young, Ziri Younsi, Feng Yuan, Ye Fei Yuan, J. Van Rossum, Jan Wagner, John Wardle, Jonathan Weintroub, Norbert Wex, Robert Wharton, Maciek Wielgus, George N. Tilanus, Michael Titus, Kenji Toma, Pablo Torne, Tyler Trent, Sascha Trippe, Shuichiro Tsuda, Ilse Van Bemmel, Huib Jan Van Langevelde, Daniel R. Peter Schloerb, Karl Friedrich Schuster, Lijing Shao, Zhiqiang Shen, Des Small, Bong Won Sohn, Jason Soohoo, Fumie Tazaki, Paul Tiede, Remo P.J. Rygl, Salvador Sánchez, David Sánchez-Arguelles, Mahito Sasada, Tuomas Savolainen, F. Raymond, Luciano Rezzolla, Bart Ripperda, Freek Roelofs, Alan Rogers, Eduardo Ros, Mel Rose, Arash Roshanineshat, Helge Rottmann, Alan L. Preciado-López, Dimitrios Psaltis, Hung Yi Pu, Venkatessh Ramakrishnan, Ramprasad Rao, Mark G. Pesce, Vincent Piétu, Richard Plambeck, Aleksandar Popstefanija, Oliver Porth, Ben Prather, Jorge A. Palumbo, Nimesh Patel, Ue Li Pen, Dominic W. Ortiz-León, Tomoaki Oyama, Feryal Ozel, Daniel C.M. Nagar, Masanori Nakamura, Ramesh Narayan, Gopal Narayanan, Iniyan Natarajan, Roberto Neri, Chunchong Ni, Aristeidis Noutsos, Hiroki Okino, Héctor Olivares, Gisela N. Moran, Kotaro Moriyama, Monika Moscibrodzka, Cornelia Müller, Hiroshi Nagai, Neil M. Menten, Yosuke Mizuno, Izumi Mizuno, James M. Marscher, Iván Marti-Vidal, Satoki Matsushita, Lynn D. Macdonald, Jirong Mao, Sera Markoff, Daniel P. Lobanov, Laurent Loinard, Colin Lonsdale, Ru Sen Lu, Nicholas R. Lauer, Sang Sung Lee, Yan Rong Li, Zhiyuan Li, Michael Lindqvist, Kuo Liu, Elisabetta Liuzzo, Wen Ping Lo, Andrei P. Koch, Shoko Koyama, Michael Kramer, Carsten Kramer, Thomas P. Keating, Mark Kettenis, Jae Young Kim, Junhan Kim, Jongsoo Kim, Motoki Kino, Jun Yi Koay, Patrick M. Johnson, Svetlana Jorstad, Taehyun Jung, Mansour Karami, Ramesh Karuppusamy, Tomohisa Kawashima, Garrett K. Jannuzi, Michael Janssen, Britton Jeter, Wu Jiang, Michael D. Hughes, Shiro Ikeda, Makoto Inoue, Sara Issaoun, David J. Gammie, Roberto Garcia, Olivier Gentaz, Boris Georgiev, Ciriaco Goddi, Roman Gold, Minfeng Gu, Mark Gurwell, Kazuhiro Hada, Michael H. Fish, Ed Fomalont, Raquel Fraga-Encinas, Per Friberg, Christian M. Crew, Yuzhu Cui, Jordy Davelaar, Mariafelicia De Laurentis, Roger Deane, Jessica Dempsey, Gregory Desvignes, Jason Dexter, Sheperd S. Carlstrom, Andrew Chael, Chi Kwan Chan, Shami Chatterjee, Koushik Chatterjee, Ming Tang Chen, Yongjun Chen, Ilje Cho, Pierre Christian, John E. Broderick Dominique Broguiere, Thomas Bronzwaer, Do Young Byun, John E. ![]() Brinkerink, Roger Brissenden, Silke Britzen, Avery E. The Event Horizon Telescope Collaboration, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Keiichi Asada, Rebecca Azulay, Anne Kathrin Baczko, David Ball, Mislav Baloković, John Barrett, Dan Bintley, Lindy Blackburn, Wilfred Boland, Katherine L. ![]()
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