Kleyna et al. estimate the mass of the newly discovered extremely low luminosity Ursa Major dwarf spheroidal and find central M/L ~ 500. They theorize that this could be an example of the missing low mass haloes that standard cosmology predicts should surround our Galaxy.
Frontera et al. review the prospects for imaging in the 60-600 keV band using Laue lenses.
Ebisawa et al. present the results of a deep Chandra observation of the Galactic plane with follow-up IR imaging. They also study the spectrum of the diffuse X-ray emission.
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