Depending on assumptions, the black hole responsible for this tidal disruption flare is estimated to have between ~10 thousand to ~100 thousand times the mass of the Sun. Optical observations suggest that the black hole associated with XMMSL1J063045.9-603110 likely resides within either a very faint dwarf galaxy or a very bright globular cluster. If the black hole resides within a globular cluster, then XMMSL1J063045.9-603110 could be the first tidal disruption flare observed in a globular cluster.
Mainetti et al. (2016), "XMMSL1J063045.9-603110: a tidal disruption event fallen into the back burner", arXiv:1605.06133 [astro-ph.HE]