Lester, D. F. (Texas Univ. Austin, TX, United States)
Gaffney, N. (Texas, University; McDonald Observatory, Austin, United States)
Carr, J. S. (Texas, University; McDonald Observatory, Austin; Hawaii, University, Honolulu, United States)
Joy, M. (NASA Marshall Space Flight Center Huntsville, AL; Texas, University; McDonald Observatory, Austin, United States)