Searching for intermediate-mass black holes in NGC3310
  Intermediate-mass black holes are theoretically predicted but observationally
elusive, and evidence for them is often indirect. The nearby face-on spiral
galaxy NGC3310 has hosted many supernovae in recent history, and recent Chandra
observations have shown a group of strong off-nuclear X-ray sources that are
coincident with radio emission seen in archival VLA and MERLIN observations.
Their luminosity, spectrum and off-nuclear location make these sources
excellent IMBH candidates. To investigate this possibility, we used combined
EVN/e-MERLIN observations at both 1.4 and 5 GHz to look for compact radio
emission and evidence of jet activity. We detect a compact radio source within
one arcsecond of a Chandra source with an estimated mass ${\rm M}_{\rm
BH}\sim3\times10^4 {\rm M}_{\odot}$.
