The WMAP results on the scalar spectral index n and its running with scale, though preliminary, open a very interesting window to physics at very high energies. We address the problem of finding simple inflaton potentials, well motivated by particle physics, that can accommodate WMAP data.

Prompted by the recent report of increased Swift/BAT activity from the neutron star X-ray transient XTE J1701-462 (ATel #3028), the source was observed for ~1.4 ks with the Rossi X-ray Timing Explorer on 2010 November 13 11:16 UTC. The average count rate from the PCA was 2.0+/-0.2 cts/s/PCU, consistent with the count rate from the Galactic ridge

We present deep optical photometry from the DECam imager on the 4 m Blanco telescope of over 12 deg2 around the Carina dwarf spheroidal, with complete coverage out to 1 deg and partial coverage extending out to 2.6 deg. Using a Poisson-based matched-filter analysis to identify stars from each of the three main stellar populations, old, intermediate

IAUC 7307 available at Central Bureau for Astronomical Telegrams.

Early-type galaxies (ETGs) satisfy a now classic scaling relation Re ∝ σ1.2eI-0.8e, the Fundamental Plane (FP; Djorgovski & Davis 1987; Dressler et al. 1987), between their size, stellar velocity dispersion and mean surface brightness. A significant effort has been devoted in the past twenty years to try to understand why the coefficients of the

The main goal of the JEM-EUSO experiment is the study of Ultra High Energy Cosmic Rays (UHECR, 1019-1021 e V), but the method which will be used (detection of the secondary light emissions induced by cosmic rays in the atmosphere) allows to study other luminous phenomena. The UHECRs will be detected through the measurement of the emission in the