Development of a new mid-infrared instrument for the TAO 6.5-m Telescope

Takashi Miyata, Shigeyuki Sako, Tomohiko Nakamura, Kentaro Asano, Mizuho Uchiyama, Takashi Onaka, Itsuki Sakon, Hirokazu Kataza, Yoshifusa Ita, Tsutomu Aoki, Mamoru Doi, Toshihiro Handa, Daisuke Kato, Kimiaki Kawara, Kotaro Kohno, Masahiro Konishi, Shintaro Koshida, Takeo Minezaki, Natsuko Mitani, Kentaro MotoharaTakao Soyano, Toshihiko Tanabe, Masuo Tanaka, Ken'ichi Tarusawa, Yuzuru Yoshii

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

Ground-based mid-infrared observations have two distinct advantages over space observations despite relatively lower sensitivity. One is the high spatial resolution and the other is the monitoring capability. These advantages can be emphasized particularly for the next coming ground-based infrared project University of Tokyo Atacama Observatory (TAO). Thanks to the low water vapor of the TAO site (5,640m) and the large aperture of the telescope (6.5meter), we can observe at 30 micron with a spatial resolution of 1 arcsec. It is about ten times higher than that of current space telescopes. The TAO is also useful for monitoring observations because of the ample observing time. To take these advantages we are now developing a new mid-infrared infrared instrument for the TAO 6.5-meter telescope. This covers a wide wavelength range from 2 to 38 micron with three detectors (Si:As, Si:Sb, and InSb). Diffraction limited spatial resolution can be achieved at wavelengths longer than 7 micron. Low-resolution spectroscopy can also be carried out with grisms. This instrument equips a newly invented "field stacker" for monitoring observations. It is an optical system that consists of two movable pick-up mirrors and a triangle shaped mirror, and combine two discrete fields of the telescope into camera's field of view. It will enable us to apply a differential photometry method and dramatically improve the accuracy and increase the feasibility of the monitoring observations at the mid-infrared wavelengths.

Original languageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy III
EditionPART 1
DOIs
Publication statusPublished - 2010 Nov 12
Externally publishedYes
EventGround-Based and Airborne Instrumentation for Astronomy III - San Diego, CA, United States
Duration: 2010 Jun 272010 Jul 2

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
NumberPART 1
Volume7735
ISSN (Print)0277-786X

Other

OtherGround-Based and Airborne Instrumentation for Astronomy III
CountryUnited States
CitySan Diego, CA
Period10/6/2710/7/2

Keywords

  • Atacama
  • imager
  • mid-infrared
  • monitoring observations
  • spectrograph

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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