The 27th Texas Symposium on Relativistic Astrophysics will be held in downtown Dallas December 8 – 13, 2013. It is organized by the Department of Physics at The University of Texas at Dallas (UTD) and is chaired by Wolfgang Rindler and Mustapha Ishak. The Symposium will include both invited and contributed talks and posters. This will be a special and historically meaningful Jubilee meeting, marking the 50th anniversary, almost to the day, of the very first of these Texas Symposia, held in Dallas in December 1963. We are excited to welcome hundreds of international astrophysicists back to Dallas fifty years later, both to celebrate the past 50 years of Texas Symposia and relativistic astrophysics and to kick off the next 50 years of remarkable discoveries.

The Symposium will cover the following topics:

**Cosmology**

- Cosmic acceleration/dark energy
- Cosmic microwave background
- Early universe (Inflation, Cyclic Model, CCC cosmology …)
- Galaxy formation and reionization
- Inhomogeneous cosmologies, averaging, and backreaction
- Large-scale surveys
- Quantum gravity/cosmology and string cosmology
- Weak gravitational lensing
- Experimental/observational cosmology – other topics
- Theoretical cosmology – other topics

**Compact objects and galactic/cluster scales**

- Black holes, mergers, and accretion discs
- Galaxy evolution and supermassive black holes
- Imaging black holes
- Microlensing and exoplanets
- Neutron stars, pulsars, magnetars, and white dwarfs
- Nuclear Equation of State for Compact Objects
- Singularities
- Strong gravitational lensing
- Supermassive black hole binaries
- Tidal disruption of stars by supermassive black holes
- Compact object observations – other topics
- Compact object theory – other topics

**High-energy astrophysics and astroparticle physics**

- Active galactic nuclei and jets
- Cosmological implications of the Higgs and the LHC
- Dark matter astrophysics
- Dark matter experiments and data
- Gamma-ray bursts, SNe connection, and sources
- High-energy cosmic rays (VHE, UHE, mechanisms, etc.)
- High-energy gamma-rays
- Nuclear Astrophysics
- Supernovae and their remnants
- High-energy astrophysics/astroparticle physics – other topics

**Testing general relativity and modified gravity**

- Alternative theories of gravity
- Strong-field tests of general relativity
- Testing general relativity at cosmological scales
- Testing general relativity – other topics
- Modified gravity – other topics

**Gravitational waves**

- Electromagnetic counterparts of gravitational wave sources
- Ongoing and planned gravitational wave experiments
- Gravitational wave theory and simulations
- Results and progress from gravitational wave searches
- Supernovae and Gravitational Wave Emission
- Gravitational waves – other topics

**Numerical relativity**

- Computer algebra and symbolic programming
- Locating black hole horizons
- Numerical simulations
- Relativistic magnetohydrodynamics
- Numerical relativity – other topics

**Other ongoing and future experiments and surveys**

- ACT, AMS, BOSS, CFHT, Chandra, DES, Euclid, Fermi, HETDEX, HSC, JWST,
- LHC, LSST, NuSTAR, Pan-STARRS, Planck, SDSS, SKA, SPT, WFIRST, WMAP, …
- (to be completed after abstract submissions)