| Affiliation: |
| AA(Thüringer Landessternwarte, D-07778 Tautenburg, Germany ), AB(McDonald Observatory and Astronomy Department, University of Texas at Austin, Austin, TX 78712 ), AC(McDonald Observatory and Astronomy Department, University of Texas at Austin, Austin, TX 78712 ), AD(McDonald Observatory and Astronomy Department, University of Texas at Austin, Austin, TX 78712 ), AE(McDonald Observatory and Astronomy Department, University of Texas at Austin, Austin, TX 78712 ), AF(Physics and Astronomy Department, University of British Columbia, Vancouver, BC V6T 1Z4, Canada ), AG(BTEC Enterprises Limited), AH(Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 3P6, Canada ) |