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Laboratory performance evaluation of the mid-infrared camera and spectrograph MIMIZUKU for the TAO 6.5-m telescope
Author(s): Takafumi Kamizuka; Masahito S. Uchiyama; Jumpei Yamaguchi; Tomohiro Mori; Ryou Ohsawa; Yutaka Yoshida; Shigeyuki Sako; Takashi Miyata; Kentaro Asano; Mizuho Uchiyama; Itsuki Sakon; Takashi Onaka; Hirokazu Kataza; Tsutomu Aoki; Mamoru Doi; Bunyo Hatsukade; Natsuko Kato; Kotaro Kohno; Masahiro Konishi; Takeo Minezaki; Tomoki Morokuma; Kentaro Motohara; Takao Soyano; Hidenori Takahashi; Toshihiko Tanabe; Masuo Tanaka; Ken'ichi Tarusawa; Yoichi Tamura; Shintaro Koshida; Yasunori Terao; Hirofumi Ohashi; Yukihiro Kono; Kosuke Kushibiki; Yuzuru Yoshii
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Paper Abstract

The Mid-Infrared Multi-field Imager for gaZing at the UnKnown Universe (MIMIZUKU) is a mid-infrared camera and spectrograph developed as a first-generation instrument on the University of Tokyo Atacama Observatory (TAO) 6.5-m telescope. MIMIZUKU covers a wide wavelength range from 2 to 38 μm and has a unique optical device called Field Stacker which realizes accurate calibration of variable atmospheric transmittance with a few percent accuracy. By utilizing these capabilities, MIMIZUKU realizes mid-infrared long-term monitoring, which has not been challenged well. MIMIZUKU has three optical channels, called NIR, MIR-S, and MIR-L, to realize the wide wavelength coverage. The MIR-S channel, which covers 6.8–26 μm, has been completed by now. We are planning to perform engineering observations with this channel at the Subaru telescope before the completion of the TAO 6.5-m telescope. In this paper, we report the results of the laboratory tests to evaluate the optical and detector performances of the MIR-S channel. As a result, we confirmed a pixel scale of 0.12 arcsec/pix and a vignetting- free field of view of 2./0 1./8. The instrument throughputs for imaging modes are measured to be 20–30%. Those for N - and Q -band spectroscopy modes are 17 and 5%, respectively. As for the detector performance, we derived the quantum efficiency to be 40–50% in the mid-infrared wavelength region and measured the readout noise to be 3000–6000 electrons, which are larger than the spec value. It was found that this large readout noise degrades the sensitivity of MIMIZUKU by a factor of two.

Paper Details

Date Published: 6 July 2018
PDF: 10 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107022H (6 July 2018); doi: 10.1117/12.2312443
Show Author Affiliations
Takafumi Kamizuka, The Univ. of Tokyo (Japan)
Masahito S. Uchiyama, The Univ. of Tokyo (Japan)
Jumpei Yamaguchi, The Univ. of Tokyo (Japan)
Tomohiro Mori, The Univ. of Tokyo (Japan)
Ryou Ohsawa, The Univ. of Tokyo (Japan)
Yutaka Yoshida, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Takashi Miyata, The Univ. of Tokyo (Japan)
Kentaro Asano, Univ. of Denver (United States)
Mizuho Uchiyama, National Astronomical Observatory of Japan (Japan)
Itsuki Sakon, The Univ. of Tokyo (Japan)
Takashi Onaka, The Univ. of Tokyo (Japan)
Hirokazu Kataza, Institute of Space and Astronautical Science (Japan)
Japan Aerospace Exploration Agency (Japan)
Tsutomu Aoki, The Univ. of Tokyo (Japan)
Mamoru Doi, The Univ. of Tokyo (Japan)
Bunyo Hatsukade, The Univ. of Tokyo (Japan)
Natsuko Kato, The Univ. of Tokyo (Japan)
Kotaro Kohno, The Univ. of Tokyo (Japan)
Masahiro Konishi, The Univ. of Tokyo (Japan)
Takeo Minezaki, The Univ. of Tokyo (Japan)
Tomoki Morokuma, The Univ. of Tokyo (Japan)
Kentaro Motohara, The Univ. of Tokyo (Japan)
Takao Soyano, The Univ. of Tokyo (Japan)
Hidenori Takahashi, The Univ. of Tokyo (Japan)
Toshihiko Tanabe, The Univ. of Tokyo (Japan)
Masuo Tanaka, The Univ. of Tokyo (Japan)
Ken'ichi Tarusawa, The Univ. of Tokyo (Japan)
Yoichi Tamura, Nagoya Univ. (Japan)
Shintaro Koshida, National Astronomical Observatory of Japan (United States)
Yasunori Terao, The Univ. of Tokyo (Japan)
Hirofumi Ohashi, The Univ. of Tokyo (Japan)
Yukihiro Kono, The Univ. of Tokyo (Japan)
Kosuke Kushibiki, The Univ. of Tokyo (Japan)
Yuzuru Yoshii, The Univ. of Tokyo (Japan)
Steward Observatory, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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