|Black hole just about finished munching on wayward star!|
NASA Swift satellite. NASA Goddard Space Flight Center
As Zauderer, et al., say in the abstract to their Nature paper: "We conclude that we are seeing a newly formed relativistic outflow, launched by a transient accretion onto a million-solar-mass black hole." They point out that the relativistic outflow was not predicted for these events, so I guess that it's back to the drawing board for the astronomers!
References: Burrows, D.N., and many others, Relativistic jet activity from the tidal disruption of a star by a massive black hole, Nature, 476, 421-424, 2011.
Zauderer, B.A., and many others, Birth of a relativistic outflow in the unusual gamma-ray transient Swift J164449.3+573451, Nature, 476, 425-428, 2011.