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Tidal disruption events (TDEs) occur when a star passes close enough to agalaxy's supermassive black hole to be disrupted by tidal forces. We discussnew observations of IGRJ12580+0134, a TDE observed in NGC 4845 (d=17 Mpc) inNovember 2010, with the Karl G. Jansky Very Large Array (JVLA). We also discussa reanalysis of 2010-2011 Swift and XMM-Newton observations, as well as new,late-time Swift observations. Our JVLA observations show a decay of the nuclearradio flux until 2015, when a plateau was seen, and then a significant (~factor3) radio flare during 2016. The 2016 radio flare was also accompanied by radiospectral changes, but was not seen in the X-rays. We model the flare asresulting from the interaction of the nuclear jet with a cloud in theinterstellar medium. This is distinct from late-time X-ray flares in a fewother TDEs where changes in the accretion state and/or a fallback event weresuggested, neither of which appears possible in this case. Our reanalysis ofthe Swift and XMM-Newton data from 2011 shows significant evidence for thermalemission from a disk, as well as a very soft power-law. This, in addition tothe extreme X-ray flux increase seen in 2010 (a factor of >$100) bolsters theidentification of IGRJ12580+0134 as a TDE, not an unusual AGN variabilityevent.

Lightcurve Evolution of the nearest Tidal Disruption Event: A late-time, radio-only flare