A relativistic jetted outburst from a massive black hole fed by a tidally disrupted star

We thank R. Romani, C. McKee and L. Blitz for close reads of drafts of this work and for helpful interactions. We are grateful to entire Swift team for work on their remarkable facilities that enabled discovery of this event. Swift, launched in November 2004, is a NASA mission in partnership with the Italian Space Agency and the UK Space Agency. Swift is managed by NASA Goddard. Penn State University controls science and flight operations from the Mission Operations Center in University Park, Pennsylvania. Los Alamos National Laboratory provides gamma-ray imaging analysis. JSB and his group were partially supported by grants NASA/NNX10AF93G, NASA/NNX10AI28G, and NSG/AST-100991. DG acknowledges support from the Lyman Spitzer, Jr. Fellowship awarded by the Department of Astrophysical Sciences at Princeton University. BDM is supported by NASA through Einstein Postdoctoral Fellowship grant number PF9-00065 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. SBC wishes to acknowledge generous support from Gary & Cynthia Bengier, the Richard & Rhoda Goldman fund, NASA/Swift grant NNX10AI21G, NASA Fermi grant NNX10A057G, and NSF grant AST-0908886. WHL is supported in part by CONACyT grant 83254. AJvdH was supported by NASA grant NNH07ZDA001-GLAST.