1. LIGO Hanford Observatory, Richland, Washington 99352, USA
2. University of Oregon, Eugene, Oregon 97403, USA
3. University of Texas Rio Grande Valley, Brownsville, Texas 78520, USA
4. LIGO Livingston Observatory, Livingston, Louisiana 70754, USA
5. University of Mississippi, Oxford, Mississippi 38677, USA
6. California Institute of Technology, Pasadena, California 91125, USA
7. Louisiana State University, Baton Rouge, Louisiana 70803, USA
8. University of Trento, Trento, Italy
9. University of Florida, Gainesville, Florida 32611, USA
10. University of Pisa, Pisa, Italy
11. Kenyon College, Gambier, Ohio 43022, USA
12. Syracuse University, Syracuse, New York 13244, USA