1. Department of Physics; Astronomy and Materials Science; Missouri State University; Springfield; MO; 65897; USA
2. Sydney Institute for Astronomy; School of Physics; University of Sydney; NSW 2006; Australia
3. Instituut voor Sterrenkunde; K.U. Leuven, Celestijnenlaan 200D; 3001; Leuven; Belgium
4. Nordic Optical Telescope; Apartado 474; 38700 Santa Cruz de La Palma; Spain
5. Institute of Theoretical Physics and Astronomy; Vilnius University; Gostauto 12; Vilnius; LT-01108; Lithuania
6. Australian Astronomical Observatory; PO Box 296; Epping; NSW 1710; Australia
7. INAF-Osservatorio Astronomico di Torino; Strada dell'Osservatorio 20; 10025; Pino Torinese; Italy
8. SETI Institute/NASA Ames Research Center; Moffett Field; CA; 94035; USA