Components of the Diffuse Ultraviolet Radiation at High Latitudes
  We have used data from the Galaxy Evolution Explorer to study the different
components of the diffuse ultraviolet background in the region between the
Galactic latitudes 70-80 degree. We find an offset at zero dust column density
(E(B - V) = 0) of $240 \pm 18$ photon units in the FUV (1539A) and $394 \pm 37$
photon units in the NUV (2316A). This is approximately half of the total
observed radiation with the remainder divided between an extragalactic
component of $114 \pm 18$ photon units in the FUV and $194 \pm 37$ photon units
in the NUV and starlight scattered by Galactic dust at high latitudes. The
optical constants of the dust grains were found to be a=0.4$\pm$0.1 and
g=0.8$\pm$0.1 (FUV) and a=0.4$\pm$0.1 and g=0.5$\pm$0.1 (NUV). We cannot
differentiate between a Galactic or extragalactic origin for the zero-offset
but can affirm that it is not from any known source.
