Late-time observations of the relativistic tidal disruption flare candidate Swift J1112.2-8238

Understand

We present late-time follow-up of the relativistic tidal disruption flare candidate Swift J1112.2-8238.

• We confirm the previously determined redshift of $z=0.8900\pm0.0005$ based on multiple emission line detections.
• {\em HST} imaging of the host galaxy indicates a complex and distorted morphology with at least two spatially distinct components.
• These are offset in velocity space by less than 350\,km\,s$^{-1}$ in VLT/X-Shooter observations, suggesting that the host is undergoing interaction with another galaxy.