1. Department of Physics, Queensborough Community College, City University of New York, 222-05 56th Ave, Bayside, NY, 11364
2. Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA
3. Department of Physics, Hunter College, City University of New York, New York, NY 10007, USA
4. Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, Nashville, TN, 37212, USA
5. Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St, Norman, OK, 73019, USA
6. Department of Astronomy, Yale University, 52 Hillhouse Ave, New Haven, CT, 06511, USA
7. Department of Physics, Grinnell College, 1115 8th Ave, Grinnel, IA, 50112, USA
8. Department of Physics & Astronomy, Rutgers University, 136 Frelinghuysen Rd., Piscataway, NJ 08854, USA
9. Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98122, USA