  Detection of 54 very high-energy (VHE) neutrinos by the IceCube Neutrino
Observatory has opened a new chapter in multi-messenger astronomy. However due
to large errors in measuring the directions of the neutrino shower-type events,
which dominate the current event list, it is difficult to identify their
astrophysical sources. We perform cross-correlation study of IceCube neutrino
events with extragalactic candidate sources using X-ray and gamma-ray selected
source catalogues such as Swift-BAT, 3LAC and TeV-Cat. We apply different cuts
on the X-ray and gamma-ray fluxes of the sources in these catalogs, and use
different source classes in order to study correlation. We use invariant
statistic and Monte Carlo simulations to evaluate statistical significance of
any correlation.
