  Deep submillimeter (submm) continuum imaging observations of the starburst
galaxy M82 are presented at 350, 450, 750 and 850 micron wavelengths, that were
undertaken with the Submillimetre Common-User Bolometer Array (SCUBA) on the
James Clerk Maxwell Telescope in Hawaii. The presented maps include a
co-addition of submm data mined from the SCUBA Data Archive. The co-added data
produce the deepest submm continuum maps yet of M82, in which low-level 850
micron continuum has been detected out to 1.5kpc, at least 10% farther in
radius than any previously published submm detections of this galaxy. The
overall submm morphology and spatial spectral energy distribution of M82 have a
general north-south asymmetry consistent with H-alpha and X-ray winds,
supporting the association of the extended continuum with outflows of dust
grains from the disk into the halo. The new data raise interesting points about
the origin and structure of the submm emission in the inner disk of M82. In
particular, SCUBA short wavelength evidence of submm continuum peaks that are
asymmetrically distributed along the galactic disk suggests the inner-disk
emission is re-radiation from dust concentrations along a bar (or perhaps a
spiral) rather than edges of a dust torus, as is commonly assumed. Higher
resolution submm interferometery data from the Smithsonian Submillimeter Array
and later Atacama Large Millimeter Array should spatially resolve and further
constrain the reported dust emission structures in M82.
