21 October 1996 Flight performance of the Far-Infrared Line Mapper (FILM)
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Abstract
The far-infrared line mapper (FILM) is a far-infrared spectrometer and in one of four focal plane instruments of the infrared telescope in space (IRTS), FILM was designed for wide area intensity mapping of far-infrared emission from interstellar gas and dust in the galaxy. The targets are the [CII] 158 micrometer line of the ionized carbon, the [OI] 63 micrometer line of the oxygen atom, and the continuum emission at 155 and 160 micrometer from the interstellar dust grain. A cylindrically concave varied line-space grating and a linear array of stressed Ge:Ga were successfully developed and allowed us to make a compact spectrometer compatible to severe limitations of the small cryogenic telescope. The IRTS, onboard the space flyer unit (SFU), was launched by a HII rocket on March 18, 1995 and was recovered by a STS on January 13, 1996. The FILM worked very well during four weeks allocated for the IRTS observation and produced a lot of valuable data. The sensitivity and the spatial resolution for the [CII] line are an order of magnitude better than the previous work.
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Hiroshi Shibai, Takao Nakagawa, Shin'ichiro Makiuti, Hideo Matsuhara, Norihisa Hiromoto, Kenichi Okumura, Yasuo Doi, Takanao Toya, Haruyuki Okuda, "Flight performance of the Far-Infrared Line Mapper (FILM)", Proc. SPIE 2817, Infrared Spaceborne Remote Sensing IV, (21 October 1996); doi: 10.1117/12.255188; https://doi.org/10.1117/12.255188
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