*PRL* (2018)

Submitted to *PRX* (2018)

*AJ* (2018)

*ApJL* (2018)

*PRL* (2017)

*ApJL* (2017)

*Nature* (2017)

*ApJL* (2017)

*ApJL* (2017)

*ApJL* (2017)

*ApJL* (2017)

*ApJL* (2017)

*ApJL* (2017)

*PRL* (2017)

*Nature* (2017)

Submitted to *PRD* (2017)

*ApJL* (2017)

*PRL* (2017)

*ApJ* (2017)

*PRL* (2016)

PRX (2016)

*PRL* (2016)

*PRL* (2016)

*PRL* (2016)

*ApJL* (2016)

*Phys. Rev. D* (2016)

*Phys. Rev. D* (2016)

*ApJL* (2016)

*ApJ* (2016)

*ApJ* (2016)

*ApJ* (2015)

*Phys. Rev. D* (2015)

*ApJ* (2014)

*Phys. Rev. D* (2014)

*Phys. Rev. D* (2014)

*Phys. Rev. D* (2014)

*ApJ* (2014)

*Phys. Rev. D* (2013)

*Am. J. Phys.* (2012)