About chemical composition of the primary cosmic radiation at ultra-high energies

About the measurements of the hard X-ray background

Absolute stability of axisymmetric perturbations in strongly-magnetized collisionless axisymmetric accretion disk plasmas

Absolute timing of the Crab pulsar with the INTEGRAL/SPI telescope

Absorption features caused by oscillations of electrons on the surface of a quark star

Absorption of high-energy gamma rays in Cygnus X-3

Absorption spectroscopy of gamma-ray burst afterglows: probing the GRB line of sight

Accelerated Orbital Expansion And Secular Spin Down of the Accreting Millisecond Pulsar SAX J1808.4-3658

Accelerating Compact Object Mergers in Triple Systems with the Kozai Resonance: A Mechanism for "Prompt" Type Ia Supernovae, Gamma-Ray Bursts, and Other Exotica

Acceleration and collimation of relativistic MHD disk winds

Acceleration and Particle Field Interactions of Cosmic Rays I: Formalism

Acceleration and Particle Field Interactions of Cosmic Rays II: Calculations

Acceleration and radiation of ultra-high energy protons in galaxy clusters

Acceleration of cosmic rays at supernova remnant shocks: constraints from gamma-ray observations

Acceleration of Particles at the Termination Shock of a Relativistic Striped Wind

Acceleration of Ultra-High Energy Cosmic Rays in the Colliding Shells of Blazars and GRBs: Constraints from the Fermi Gamma ray Space Telescope

Accreting magnetars: a new type of high-mass X-ray binaries?

Accretion and ejection in Sgr A*

Accretion and jet power in active galactic nuclei

Accretion and outflow from a magnetized, neutrino cooled torus in the gamma ray burst central engine