  HESS J0632+057 is the only gamma-ray binary known so far whose position in
the sky allows observations with ground-based observatories both in the
northern and southern hemispheres. Here we report on long-term observations of
HESS J0632+057 conducted with the VERITAS and H.E.S.S. Cherenkov Telescopes and
the X-ray Satellite Swift, spanning a time range from 2004 to 2012 and covering
most of the system's orbit. The VHE emission is found to be variable, and is
correlated with that at X-ray energies. An orbital period of $315 ^{+6}_{-4}$
days is derived from the X-ray data set, which is compatible with previous
results, $P = (321 \pm 5$) days. The VHE light curve shows a distinct maximum
at orbital phases close to 0.3, or about 100 days after periastron passage,
which coincides with the periodic enhancement of the X-ray emission.
Furthermore, the analysis of the TeV data shows for the first time a
statistically significant ($> 6.5 \sigma$) detection at orbital phases
0.6--0.9. The obtained gamma-ray and X-ray light curves and the correlation of
the source emission at these two energy bands are discussed in the context of
the recent ephemeris obtained for the system. Our results are compared to those
reported for other gamma-ray binaries.

High Energy Astrophysical Phenomena