1. TAPIR, Mailcode 350-17, California Institute of Technology, Pasadena, CA 91125, USA
2. Carnegie Observatories, Pasadena, CA 91101, USA
3. Department of Physics, University of California, Davis, CA 95616, USA
4. Department of Physics, Center for Astrophysics and Space Science, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
5. Department of Physics and Astronomy and CIERA, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
6. Department of Astronomy and Theoretical Astrophysics Center, University of California Berkeley, Berkeley, CA 94720, USA
7. Department of Astronomy, The University of Texas at Austin, 2515 Speedway, Stop C1400, Austin, TX 78712, USA
8. Canadian Institute for Theoretical Astrophysics, 60 St. George Street, University of Toronto, ON M5S 3H8, Canada
9. Center for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USA
10. Institute for Computational Science, University of Zurich, Zurich CH-8057, Switzerland
11. Department of Physics, MIT, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
12. Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics, Stanford University, Stanford, CA, USA
13. Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA
14. Department of Astronomy, University of Florida, Gainesville, FL 32611, USA