KH15D: Detection of Significant Structure in the Circum-stellar Disk of a Pre-Main Sequence Star Hamilton, C. ; Herbst, W. ; Bailer-Jones, C. ; Mundt, R. ; Lamm, M. ; Vrba, F. ; Ibraghimov, M. ; Mazeh, T. ; Webster, Z. T. ; Haisch, K. ; Williams, W. ; Rhodes, A. ; Balonek, T. ; Scholz, A. ; Riffeser, A. Abstract Publication: Astronomische Nachrichten Supplement Pub Date: July 2003 Bibcode: 2003ANS...324Q...9H