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The Korean Astronomical Society (한국천문학회)
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AKARI OBSERVATIONS OF THE FLUCTUATIONS OF THE NEAR-INFRARED BACKGROUND II

  • Seo, H.J. (Department of Physics and Astronomy, Seoul National University) ;
  • Lee, H.M. (Department of Physics and Astronomy, Seoul National University) ;
  • Matsumoto, T. (Institute of Astronomy and Astrophysics, Academia Sinica) ;
  • Jeong, W.S. (Korea Astronomy and Space Science Institute (KASI)) ;
  • Lee, M.G. (Department of Physics and Astronomy, Seoul National University) ;
  • Pyo, J. (Korea Astronomy and Space Science Institute (KASI))
  • Received : 2015.07.16
  • Accepted : 2016.10.25
  • Published : 2017.03.31
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Abstract

We report a spatial fluctuation analysis of the sky brightness in the near-infrared from observations towards the north ecliptic pole (NEP) by AKARI at 2.4 and $3.2{\mu}m$. As a follow up study of our previous work on the Monitor field of AKARI, we used NEP deep survey data, which covered a circular area of about 0.4 square degrees, in order to extend fluctuation analysis at angular scales up to 1000". After pre-processing, additional correction procedures were done to correct time varying components and instrumental effects such as MUXbleed. To remove resolved objects, we applied $2{\sigma}$ clipping and point spread function (PSF) subtraction. We finally obtained mosaicked images which can be used for the study of various diffuse emissions in the near-infrared sky and found that there are spatial structures in the mosaicked images using a power spectrum analysis.

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References

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