The Far-Infrared Surveyor (FIS) for AKARI

Mitsunobu Kawada, Hajime Baba, Peter D. Barthel, David Clements, Martin Cohen, Yasuo Doi, Elysandra Figueredo, Mikio Fujiwara, Tomotsugu Goto, Sunao Hasegawa, Yasunori Hibi, Takanori Hirao, Norihisa Hiromoto, Woong Seob Jeong, Hidehiro Kaneda, Toshihide Kawai, Akiko Kawamura, Do Kester, Tsuneo Kii, Hisato KobayashiSuk Minn Kwon, Hyung Mok Lee, Sin'itirou Makiuti, Hiroshi Matsuo, Shuji Matsuura, Thomas G. Müller, Noriko Murakami, Hirohisa Nagata, Takao Nakagawa, Masanao Narita, Manabu Noda, Sang Hoon Oh, Yoko Okada, Haruyuki Okuda, Sebastian Oliver, Takafumi Ootsubo, Soojong Pak, Yong Sun Park, Chris P. Pearson, Michael Rowan-Robinson, Toshinobu Saito, Alberto Salama, Shinji Sato, Richard S. Savage, Stephen Serjeant, Hiroshi Shibai, Mai Shirahata, Jungjoo Sohn, Toyoaki Suzuki, Toshinobu Takagi, Hidenori Takahashi, Matthew Thomson, Fumihiko Usui, Eva Verdugo, Toyoki Watabe, Glenn J. White, Lingyu Wang, Issei Yamamura, Chisato Yamauchi, Akiko Yasuda

Research output: Contribution to journalReview articlepeer-review

244 Citations (Scopus)


The Far-Infrared Surveyor (FIS) is one of two focal-plane instruments on the AKARI satellite. FIS has four photometric bands at 65, 90, 140, and 160 μm, and uses two kinds of array detectors. The FTS arrays and optics are designed to sweep the sky with high spatial resolution and redundancy. The actual scan width is more than eight arcminutes, and the pixel pitch matches the diffraction limit of the telescope. Derived point-spread functions (PSFs) from observations of asteroids are similar to those given by the optical model. Significant excesses, however, are clearly seen around tails of the PSFs, whose contributions are about 30% of the total power. All FIS functions are operating well in orbit, and the performance meets the laboratory characterizations, except for the two longer wavelength bands, which are not performing as well as characterized. Furthermore, the FIS has a spectroscopic capability using a Fourier transform spectrometer (FTS). Because the FTS takes advantage of the optics and detectors of the photometer, it can simultaneously make a spectral map. This paper summarizes the in-flight technical and operational performance of the FIS.

Original languageEnglish
Pages (from-to)S389-S400
JournalPublications of the Astronomical Society of Japan
Issue numberSPEC. ISS. 2
Publication statusPublished - 2007
Externally publishedYes


  • Infrared: general
  • Instrumentation: detectors
  • Vehicles: instruments

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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