tokens: We greatly appreciate the lengthy conversations with Cole Miller regarding the development of the MCMC code. We thank the referee for carefully reading the manuscript and providing many helpful comments that led to its improvement. This research was supported in part by the Howard Hughes Medical Institute through the Undergraduate Science Education Program. We also are grateful for the generous support of the Michigan Space Grant Consortium, the National Science Foundation under Grant Nos. REU: PHY/DMR-1004811 and RUI: AST-1009731, the Fermi Guest Investigator Program Cycle 3 under Grant No. NNH09ZDA001N-FERMI3, and the NASA Astrophysics Theory and Fundamental Physics Program under Grant No. NNX13AO12G.
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