L. Chen (1), Y.Q. Lou (2), M. Wu (3), J.L. Qu (3), S.M. Jia (1), X.J. Yang (1) ((1)Department of Astronomy, Beijing Normal University, (2) (a) Physics Department and the Tsinghua Center for Astrophysics (THCA), Tsinghua University; (b) Department of Astronomy and Astrophysics, The University of Chicago; (c) National Astronomical Observatories, Chinese Academy of Sciences, (3) Particle Astrophysics Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences)
