An Ultraviolet Study of Star-Forming Regions in M31
An Unbiased Method of Modeling the Local Peculiar Velocity Field with Type Ia Supernovae
An unbiased sample of bright southern Compact Steep Spectrum and Gigahertz Peaked Spectrum Sources
An unlikely radio halo in the low X-ray luminosity galaxy cluster RXC J1514.9-1523
An update on single field models of inflation in light of WMAP7
An updated analysis of two classes of f(R) theories of gravity
An updated catalog of M31 globular-like clusters: UBVRI photometry, ages, and masses
An updated Gamma Ray Bursts Hubble diagram
An updated MILES stellar library and stellar population models
An upper limit on the contribution of accreting white dwarfs to the type Ia supernova rate
An upper limit on the mass of the black hole in Ursa Minor dwarf galaxy
An Upper Limit on the Stochastic Gravitational-Wave Background of Cosmological Origin
An upper limit to the central density of dark matter haloes from consistency with the presence of massive central black holes
An upper limit to the dry merger rate at <z> ~ 0.55
An upper limit to the variation in the fundamental constants at redshift z = 5.2
An X-ray Investigation of Three Supernova Remnants in the Large Magellanic Cloud
An X-ray Selected Galaxy Cluster in the Lockman Hole at Redshift 1.753
An X-ray underluminous cluster of galaxies in the 4Ms CDFS observations
An X-ray view of 82 LINERs with Chandra and XMM-Newton data
An X-ray View of Star Formation in the Central 3 kpc of NGC 2403