Seth Stein, Edward Brooks, Bruce Spencer, Kris Vanneste, Thierry Camelbeeck and Bart Vleminckx

Stein and Brooks are at the Department of Earth and Planetary Sciences and the Institute for Policy Research at Northwestern University. Spencer is at the Department of Statistics and the Institute for Policy Research at Northwestern University. Vanneste, Camelbeeck and Vleminckx are at the Royal Observatory of Belgium.