  Black holes at the centre of quiescent galaxies can be switched on when they
accrete gas that is gained from stellar tidal disruptions. A star approaching a
black hole on a low angular momentum orbit may be ripped apart by tidal forces,
which triggers raining down of a fraction of stellar debris onto the compact
object through an accretion disc and powers a bright flare. In this paper we
discuss XMMSL1J063045.9-603110 as a candidate object for a tidal disruption
event. The source has recently been detected to be bright in the soft X-rays
during an XMM-Newton slew and later showed an X-ray flux decay by a factor of
about 10 in twenty days. We analyse XMM-Newton and Swift data.
XMMSL1J063045.9-603110 shows several features typical of tidal disruption
events: the X-ray spectrum shows the characteristics of a spectrum arising from
a thermal accretion disc, the flux decay follows a t^-5/3 law, and the flux
variation is > 350. Optical observations testify that XMMSL1J063045.9-603110 is
probably associated with an extremely small galaxy or even a globular cluster,
which suggests that intermediate-mass black holes are located in the cores of
(at least) some of them.
