A Type Ia Supernova at Redshift 1.55 in Hubble Space Telescope Infrared Observations from CANDELS
A unified constraint on the Lorentz invariance violation from both short and long GRBs
A unified model of the magnetar and radio pulsar bursting phenomenology
A Uniform Correlation between Synchrotron Luminosity and Doppler Factor in Gamma-ray Bursts and Blazars: hint of similar intrinsic luminosities?
A Unique Method to Determine SNe Initial Explosion Energy
A unique X-ray unabsorbed Seyfert 2 galaxy IRAS F01475-0740
A United Model for the cosmic ray energy spectra and anisotropy in the energy range 100 - 100 000 GeV
A universal scaling for short and long gamma-ray bursts: E_{X,iso}-E_{gamma,iso}-E_{pk}
A universal, post Big-Bang Nucleo-synthesis, pre-Galactic, origin of the Lithium (Spite) Plateau
A UV flux drop preceding the X-ray hard-to-soft state transition during the 2010 outburst of GX 339-4
A variability study of the AGILE first catalog of γ-ray sources on 2.3 years of AGILE pointed observations
A Variable Black Hole X-Ray Source in a NGC 1399 Globular Cluster
A variable mid-infrared synchrotron break associated with the compact jet in GX 339-4
A Variable Partial Covering Model for the Seyfert 1 Galaxy MCG-6-30-15
A very large glitch in PSR B2334+61
A very rare triple-peaked type-I X-ray burst in the low-mass X-ray binary 4U 1636-53
A VLA search for 5 GHz radio transients and variables at low Galactic latitudes
A weak compact jet in a soft state of Cygnus X-1
A year-long AGILE observation of Cygnus X-1 in hard spectral state
A ~4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304?