The nature of relativistic jets produced when a star falls into a blackhole

Relativistic jets are observed in systems such as pulsars, AGNs, micro-quasars, GRBs etc. However, in spite of the work in the last more than 30 years we don't yet understand some basic properties of these jets such as whether the jet energy is primarily in the form of magnetic fields or the kinetic energy of matter. In a few cases, relativistic jets are also produced when a star is tidally disrupted by a super-massive black hole (TDE); these events turn out to be very useful for answering the basic question of jet composition. I will describe one particular tidal disruption event, and discuss the mechanism by which X-rays were produced in  this case and the composition of the relativistic jet that was inferred. Predictions for the reprocessed IR radiation by dust in the nuclear region of the TDE host galaxy, and recent observational confirmation will also be described.