Aims: The very high energy (VHE ≳100 GeV) γ-ray MAGIC observations of the blazar S4 0954+65, were triggered by an exceptionally high flux state of emission in the optical. This blazar has a disputed redshift of z = 0.368 or z ≥ 0.45 and an uncertain classification among blazar subclasses. The exceptional source state described here makes for an

We present near-infrared colour-magnitude diagrams and star counts for a number of regions along the Galactic plane. It is shown that along the l=27°, b=0° line of sight there is a feature at 5.7+/-0.7kpc with a density of stars at least a factor of 2 and probably more than a factor of 5 times that of the disc at the same position. This feature

The goal of this paper is to present the Transmission Matrix of the SPI Mask STM/QM Model. The experimental set-up used to determine INTEGRAL Spectrometer (SPI) Mask Transmission Matrix is hereafter described: collimation system, radioactive sources, energy ranges covered and pitch angles covering the expected SPI Field of View. The QM results

We present the study of the metallicity dependence of the Fourier amplitude ratios R21 and R31 for the light curves of short-period Galactic classical Cepheids in B, V, RC and IC bands. Based on the available photometric and spectroscopic data, we determined the relations between the atmospheric iron abundance, [Fe/H], and the Fourier parameters

Close binaries, and in particular cataclysmic variables (CVs), play a vital role in the dynamical evolution of globular clusters. It is, therefore, important to understand the formation of these systems in the core of a cluster. Here we propose to test the dynamical formation scenarios of CVs by observing NGC 2808 in the X-rays with Chandra. In

Ingenio/SEOSAT is the flagship mission for the Spanish Space Plan 2007-2011, as is currently under development by a Spanish industrial consortium in the framework of an ESA contract. Ingenio/SEOSAT is a multi-spectral high-resolution optical satellite for Earth Remote Sensing, designed to provide imagery to different Spanish civil, institutional