1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA.
2. University of Florida, Gainesville, FL 32611, USA.
3. Fermilab Center for Particle Astrophysics, Batavia, IL 60510, USA.
4. San Diego State University, San Diego, CA 92182, USA.
5. NASA Ames Research Center, Moffett Field, CA 94035, USA.
6. Stanford University, Stanford, CA 94305, USA.
7. University of California, Berkeley, CA 94720, USA.
8. San Jose State University, San Jose, CA 95192, USA.
9. SETI Institute, Mountain View, CA 94043, USA.
10. University of Texas, Austin, TX 78712, USA.
11. Niels Bohr Institute, Copenhagen University, DK-2100 Copenhagen, Denmark.
12. Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA.
13. University of California, Santa Barbara, CA 93106, USA.
14. Lowell Observatory, Flagstaff, AZ 86001, USA.
15. Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA 91109, USA.
16. Space Telescope Science Institute, Baltimore, MD 21218, USA.
17. National Optical Astronomy Observatory, Tucson, AZ 85719, USA.
18. NASA Exoplanet Science Institute/California Institute of Technology, Pasadena, CA 91125, USA.
19. Yale University, New Haven, CT 06510, USA.
20. California Institute of Technology, Pasadena, CA 91125, USA.