Radio Imaging of the Very-High-Energy $γ$-Ray Emission Region in the Central Engine of a Radio Galaxy
V.~A. Acciari,
E. Aliu,
T. Arlen,
M. Bautista,
M. Beilicke,
W. Benbow,
S.~M. Bradbury,
J.~H. Buckley,
V. Bugaev,
Y. Butt,
et al.
July 2009