We have constructed a wide-field photometric survey system called as the Korea Microlensing Telescope Network (KMTNet) in 2015. It consists of three 1.6 m optical telescopes equipped with mosaic CCD cameras. Four 9k CCDs were installed on the focal plane of each telescope. In this paper, we present the crosstalk analysis of the KMTNet mosaic CCD images. The crosstalk victims caused by bright sources were visible at eight sub-images obtained through different readout ports of each CCD. The crosstalk coefficients were estimated to be several tens of 10-4 in maximum, differing from sub-image to sub-image, and the non-linearity effect certainly appeared at the victims made from saturated sources. We developed software functions to correct the crosstalk effect of the KMTNet CCD images. The software functions showed satisfying results to remove clearly most of the crosstalk victims and have been implemented in the KMTNet image processing pipeline since 2015 September.

ABSTRACT
1. 서론
2. KMTNet CCD 영상의 크로스톡 현상
3. KMTNet CCD 영상의 크로스톡 보정 프로그램 개발
4. 요약 및 결론
REFERENCES

• 김승리(한국천문연구원/과학기술연합대학원대학교) | SEUNG-LEE KIM (Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• 차상목(한국천문연구원/경희대학교 우주탐사학과) | SANG-MOK CHA (Korea Astronomy and Space Science Institute/School of Space Research, Kyung Hee University)
• 이충욱(한국천문연구원/과학기술연합대학원대학교) | CHUNG-UK LEE (Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• 김동진(한국천문연구원) | DONG-JIN KIM (Korea Astronomy and Space Science Institute)
• 박병곤(한국천문연구원/과학기술연합대학원대학교) | BYEONG-GON PARK (Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• 이용석(한국천문연구원/경희대학교 우주탐사학과) | YONGSEOK LEE (Korea Astronomy and Space Science Institute/School of Space Research, Kyung Hee University)
• 박홍수(한국천문연구원/과학기술연합대학원대학교) | HONG SOO PARK (Korea Astronomy and Space Science Institute/Korea University of Science and Technology)
• 경재만(한국천문연구원) | JAEMANN KYEONG (Korea Astronomy and Space Science Institute)
• 천무영(한국천문연구원) | MOO-YOUNG CHUN (Korea Astronomy and Space Science Institute)