  The observational evidence for central black holes in globular clusters has
been argued extensively, and their existence has important consequences for
both the formation and evolution of the cluster. Most of the evidence comes
from dynamical arguments, but the interpretation is difficult, given the short
relaxation times and old ages of the clusters. One of the most robust
signatures for the existence of a black hole is radio and/or X-ray emission. We
observed three globular clusters, NGC6093 (M80), NGC6266 (M62), and NGC7078
(M15), with the VLA in the A and C configuration with a 3-sigma noise of 36, 36
and 25 microJy, respectively. We find no statistically-significant evidence for
radio emission from the central region for any of the three clusters. NGC6266
shows a 2-sigma detection. It is difficult to infer a mass from these upper
limits due to uncertainty about the central gas density, accretion rate, and
accretion model.
