1. Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611-2055, USA
2. Department of Mathematics and Physics, College of Life and Physical Sciences, Tennessee State University, Boswell Science Hall, Nashville, TN 37209, USA
3. Tennessee State University, Center of Excellence in Information Systems, Nashville, TN 37203, USA
4. Instituto de Astrofísica de Canarias, C/Vía Láctea S/N, E-38200 La Laguna, Spain
5. Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain
6. Department of Physics & Astronomy, Vanderbilt University, Nashville, TN 37235 USA
7. Astronomy Department, University of Washington, Box 951580, Seattle, WA 98195, USA
8. Steward Observatory, The University of Arizona, Tucson, AZ 85719, USA