Koss Michael J, Blecha Laura, Bernhard Phillip, Hung Chao-Ling, Lu Jessica R, Trakhtenbrot Benny, Treister Ezequiel, Weigel Anna, Sartori Lia F, Mushotzky Richard, Schawinski Kevin, Ricci Claudio, Veilleux Sylvain, Sanders David B
Eureka Scientific Inc, Oakland, CA, USA.
Institute for Particle Physics and Astrophysics, ETH Zürich, Zürich, Switzerland.
Nature. 2019 Apr;568(7750):E1. doi: 10.1038/s41586-018-0827-2.
In this Letter, the spelling of author Benny Trakhtenbrot was corrected; the affiliation for author Sylvain Veilleux was amended; and a new ref. 9 was added to the Abstract with subsequent references renumbered; these errors have been corrected online.