Y. D. Park(Korea Astronomy and Space Sience Institute)
D.-Y. Lee(Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Science Research, Chungbuk National University)
Y.-J. Moon(Kyung Hee University)
K.-S. Cho(Korea Astronomy and Space Sience Institute)
Su-Chan Bong(Korea Astronomy and Space Sience Institute)
J.E- Hwangbo(Korea Astronomy and Space Sience Institute, Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Science Research, Chungbuk National University)