Publications of The Korean Astronomical Society (천문학논총)

The Korean Astronomical Society (한국천문학회)
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AN EXTENSION OF A RELIABLE WAVELENGTH COVERAGE OF THE AKARI NG GRISM MODE

  • Baba, Shunsuke (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Nakagawa, Takao (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Isobe, Naoki (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Shirahata, Mai (National Astronomical Observatory of Japan) ;
  • Ohyama, Youichi (Institute of Astronomy and Astrophysics) ;
  • Yano, Kenichi (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency) ;
  • Kochi, Chihiro (Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)
  • Received : 2015.02.19
  • Accepted : 2016.10.17
  • Published : 2017.03.31
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Abstract

The Infrared Camera onboard the AKARI satellite carried out spectroscopic observations with a grism mode named NG, whose wavelength coverage was $2.5-5.0{\mu}m$. We reinvestigate the current flux calibration for the NG grism mode, with which calculated flux density implausibly decreases at $4.9{\mu}m$ especially for red objects due to the second-order light contamination. We perform a new spectral response calibration using blue and red standard objects simultaneously. New response curves which contain both the first-and second-order light are able to separate each contribution consistently and useful for studies of red objects such as CO ro-vibrational absorption in active galactic nuclei.

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References

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