We report a spatial uctuation 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 μm. As a follow up study of our previous work on the Monitor eld of AKARI, we used NEP deep survey data, which covered a circular area of about 0.4 square degrees, in order to extend uctuation 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 2α 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.

ABSTRACT
1. INTRODUCTION
2. OBSERVATION AND DATA REDUCTION
    2.1. Observation
    2.2. Pre-processing
    2.3. Additional Correction Procedures
    2.4. Source Subtraction
3. POWER SPECTRUM
4. SUMMARY
REFERENCES

• H. J. Seo(Department of Physics and Astronomy, Seoul National University)
• H. M. Lee(Department of Physics and Astronomy, Seoul National University)
• T. Matsumoto(Institute of Astronomy and Astrophysics, Academia Sinica/Department of Infrared Astrophysics, Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA)/Korea Astronomy and Space Science Institute (KASI))
• W. -S. Jeong(Korea Astronomy and Space Science Institute (KASI)/Korea University of Science and Technology)
• M. G. Lee(Department of Physics and Astronomy, Seoul National University)
• J. Pyo(Korea Astronomy and Space Science Institute (KASI))