1. TAPIR , Mailcode 350-17, California Institute of Technology, Pasadena, CA 91125 , USA
2. Department of Physics & Astronomy and CIERA , Northwestern University, 1800 Sherman Ave, Evanston, IL 60201 , USA
3. Department of Physics and Astronomy, University of California Irvine , Irvine, CA 92697 , USA
4. Carnegie Observatories , 813 Santa Barbara St, Pasadena, CA 91101 , USA
5. Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., New York, NY 10010 USA
6. Department of Physics and Astronomy, Rutgers University , 136 Frelinghuysen Road, Piscataway, NJ 08854 , USA
7. Department of Physics & Astronomy, University of California , Davis, CA 95616 , USA
8. Department of Physics, Center for Astrophysics and Space Sciences,University of California San Diego , 9500 Gilman Drive, La Jolla, CA 92093 , USA
9. School of Physics & Astronomy, Tel Aviv University , Tel Aviv 69978 , Israel
10. Department of Physics and Astronomy, California State Polytechnic University , Pomona, Pomona, CA 91768 , USA
11. Center for Astrophysics, Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USA
12. Department of Physics, University of California , Merced, 5200 N. Lake Road, Merced, CA 95343 , USA
13. Department of Physics and Astronomy, Pomona College , Claremont, CA 91711 , USA
14. Department of Astronomy, The University of Texas at Austin , 2515 Speedway, Stop C1400, Austin, Texas 78712-1205 , USA
15. Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544 , USA