1. TAPIR , Mailcode 350-17, California Institute of Technology, Pasadena, CA 91125, USA
2. Department of Physics and Astronomy, University of California , Davis, CA 95616, USA
3. Department of Physics and Astronomy, California State Polytechnic University , Pomona, Pomona, CA 91768, USA
4. Department of Physics and Astronomy, University of Pennsylvania , 209 South 33rd Street, Philadelphia, PA 19104, USA
5. Carnegie Observatories , 813 Santa Barbara St, Pasadena, CA 91101, USA
6. Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, TX 78712-1205, USA
7. Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., New York, NY 10010 USA
8. Department of Astronomy and Theoretical Astrophysics Center, University of California Berkeley, CA 94720, USA
9. Department of Physics and Astronomy and CIERA, Northwestern University , 2145 Sheridan Road, Evanston, IL 60208, USA
10. Department of Physics, Center for Astrophysics and Space Science, University of California at San Diego , 9500 Gilman Drive, La Jolla, CA 92093, USA
11. Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544, USA
12. Department of Physics and Astronomy, Pomona College , Claremont, CA 91711, USA
13. Institute for Computational Science, University of Zurich , Winterthurerstrasse 190, Zurich CH-8057, Switzerland
14. Department of Physics and Astronomy , 4129 Reines Hall, University of California, Irvine, CA 92697, USA
15. Department of Physics, University of California , Merced, 5200 N. Lake Road, Merced, CA 95343, USA
16. Department of Physics, University of Connecticut , 196 Auditorium Road, U-3046, Storrs, CT 06269, USA
17. School of Physics and Astronomy, Tel Aviv University , Tel Aviv 69978, Israel
18. Department of Physics & Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , Cambridge, MA 02139, USA