The University of Tokyo Atacama Observatory 6.5m Telescope: overview and construction status

Yuzuru Yoshii; Mamoru Doi; Takashi Miyata; Kotaro Kohno; Masuo Tanaka; Takeo Minezaki; Shigeyuki Sako; Tomoki Morokuma; Toshihiko Tanabe; Bunyo Hatsukade; Masahiro Konishi; Takafumi Kamizuka; Kentaro Asano; Hiroaki Sameshima; Natsuko Kato; Mizuki Numata; Hidenori Takahashi; Tsutomu Aoki; Takao Soyano; Ken'ichi Tarusawa; Kenji Yoshikawa; Kentaro Motohara; Yoichi Tamura; Shintaro Koshida; Toshihiro Handa; Leonardo Bronfman; Maria Ruiz; Mario Hamuy; Rene Mendez; Andres Escala

doi:10.1117/12.2560238

13 December 2020 The University of Tokyo Atacama Observatory 6.5m Telescope: overview and construction status

Yuzuru Yoshii, Mamoru Doi, Takashi Miyata, Kotaro Kohno, Masuo Tanaka, Takeo Minezaki, Shigeyuki Sako, Tomoki Morokuma, Toshihiko Tanabe, Bunyo Hatsukade, Masahiro Konishi, Takafumi Kamizuka, Kentaro Asano, Hiroaki Sameshima, Natsuko Kato, Mizuki Numata, Hidenori Takahashi, Tsutomu Aoki, Takao Soyano, Ken'ichi Tarusawa, Kenji Yoshikawa, Kentaro Motohara, Yoichi Tamura, Shintaro Koshida, Toshihiro Handa, Leonardo Bronfman, Maria Ruiz, Mario Hamuy, Rene Mendez, Andres Escala

Author Affiliations +

Proceedings Volume 11445, Ground-based and Airborne Telescopes VIII; 1144514 (2020) https://doi.org/10.1117/12.2560238
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Institute of Astronomy, Graduate School of Science, the University of Tokyo is promoting the University of Tokyo Atacama Observatory Project, which is to construct an infrared-optimized 6.5m telescope at the summit of Co. Chajnantor (5640m altitude) in northern Chile. The high altitude and dry climate (PWV-0.5mm) realize transparent atmosphere in the infrared wavelength. The project is now approaching the final phase of the construction. Production of major components are almost completed: Production and preassembly test of a telescope mount and dome enclosure have been completed in Japan, and they are being transported to Chile. Three mirrors, the 6.5m primary, 0.9m secondary, and 1.1m-0.75m tertiary mirrors and their support systems have been all completed and tested in the USA. An aluminizing chamber have been fabricated in China, and its tests have been carried out in Japan. Development of two facility instruments, SWIMS and MIMIZUKU, are also completed. They were transported to the Subaru telescope, successfully saw the first light in 2018, and are confirmed to have the performance as designed. On-site construction work at the summit is now underway. Expansion of a summit access road from the ALMA concession was completed in 2019. Installation of foundation will follow, and then erection of the dome enclosure and a control building. The construction works are delayed by COVID-19, and we expect to complete the dome enclosure by Q3 of 2021. The telescope will be installed inside the dome and see the engineering first light by early 2022.

Conference Presentation

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Yuzuru Yoshii, Mamoru Doi, Takashi Miyata, Kotaro Kohno, Masuo Tanaka, Takeo Minezaki, Shigeyuki Sako, Tomoki Morokuma, Toshihiko Tanabe, Bunyo Hatsukade, Masahiro Konishi, Takafumi Kamizuka, Kentaro Asano, Hiroaki Sameshima, Natsuko Kato, Mizuki Numata, Hidenori Takahashi, Tsutomu Aoki, Takao Soyano, Ken'ichi Tarusawa, Kenji Yoshikawa, Kentaro Motohara, Yoichi Tamura, Shintaro Koshida, Toshihiro Handa, Leonardo Bronfman, Maria Ruiz, Mario Hamuy, Rene Mendez, and Andres Escala "The University of Tokyo Atacama Observatory 6.5m Telescope: overview and construction status", Proc. SPIE 11445, Ground-based and Airborne Telescopes VIII, 1144514 (13 December 2020); https://doi.org/10.1117/12.2560238

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