Y. Zu, C. Kochanek, S. Kozłowski, and A. Udalski. (2012)cite arxiv:1202.3783Comment: 6 pages, 6 figures, ApJ Submitted. For a brief video explaining the key result of this paper, see http://www.youtube.com/user/OSUAstronomy, or http://v.youku.com/v_show/id_XMzUzMDAwMTQ0.html in countries where YouTube is not accessible.