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Proceedings Paper

Supplementary information on the near-infrared spectroscopic data of the infrared camera (IRC) onboard AKARI
Author(s): Itsuki Sakon; Takashi Onaka; Takafumi Ootsubo; Hideo Matsuhara; Jennifer Noble
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Paper Abstract

We have investigated the on-orbit properties of the spectroscopic data taken with NIR channel of the Infrared Camera (IRC) onboard AKARI during the phases 1, 2 and 3. We have determined the boundary shape of the aperture mask of NIR channel by using the spectroscopic data of uniform zodiacal background emission. The information on the aperture mask shape is indispensable in modeling and subtracting the spectroscopic background patterns made by the diffuse background emission such as zodiacal emission and the Galactic cirrus emission. We also have examined the wavelength dependency on the profile of the point spread function and its effect on the spectroscopic data. The obtained information is useful, for example, in reducing the spectroscopic data of a point source badly affected by bad pixels and in decomposing the overlapping spectra of sources that are aligned in the dispersion direction with a small offset the cross dispersion direction. In this paper, we summarize the supplementary knowledge that will be useful for the advanced data reduction procedures of NIR spectroscopic datasets.

Paper Details

Date Published: 21 September 2012
PDF: 9 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 844244 (21 September 2012); doi: 10.1117/12.926967
Show Author Affiliations
Itsuki Sakon, The Univ. of Tokyo (Japan)
Takashi Onaka, The Univ. of Tokyo (Japan)
Takafumi Ootsubo, Tohoku Univ. (Japan)
Hideo Matsuhara, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Jennifer Noble, Lab. PIIM, CNRS, Aix-Marseille Univ. (France)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann, Editor(s)

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