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Proceedings Paper

Liquid-helium-cooled Fabry-Perot spectrometer and the frequency switching method for far-infrared spectroscopic observations
Author(s): Takao Nakagawa; Haruyuki Okuda; Hiroshi Shibai; Hideo Matsuhara; Yukiyasu Kobayashi; Norihisa Hiromoto
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Paper Abstract

The Fabry-Perot spectrometer designed for NIR spectroscopic observations on the Balloon-borne Infrared Telescope (BIRT) is described in detail. Particular attention is given to the newly developed frequency switching method used in the BIRT, which is especially suitable for observations of spatially extended emission because the frequency switching mode does not require spacial chopping. Observations are described from two successful experiments conducted in 1988 using the Fabry-Perot spectrometer on the BIRT, in both the spatial chopping mode and the frequency switching mode.

Paper Details

Date Published: 1 July 1990
PDF: 11 pages
Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); doi: 10.1117/12.19079
Show Author Affiliations
Takao Nakagawa, Institute of Space and Astronautical Science (Japan)
Haruyuki Okuda, Institute of Space and Astronautical Science (Japan)
Hiroshi Shibai, Institute of Space and Astronautical Science (Japan)
Hideo Matsuhara, Nagoya Univ. (Japan)
Yukiyasu Kobayashi, Univ. of Tokyo (Japan)
Norihisa Hiromoto, Communications Research Lab. (Japan)


Published in SPIE Proceedings Vol. 1235:
Instrumentation in Astronomy VII
David L. Crawford, Editor(s)

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