This paper by one of the team members has more detail about the process used to narrow down the search field to a list of galaxies and identify possible locatio

This paper by one of the team members has more detail about the process used to narrow down the search field to a list of galaxies and identify possible locations of the event: [edit]: link to the exact paragraph that discusses the method http://science.sciencemag.org/content/early/2017/10/13/science.aap9811.full#p-9 http://science.sciencemag.org/content/early/2017/10/13/scien...