CLÉS is an evolution code recently developed to produce stellar models meeting the specific requirements of studies in asteroseismology. It offers the users a lot of choices in the input physics they want in their models and its versatility allows them to tailor the code to their needs and implement easily new features. We describe the features

As part of our ongoing Chandra/HST M31 transient program we report on Chandra ACIS observations of M31 containing the new transient sources reported by Pietsch et al. (2008, ATel #1647). Two 5ks observations were performed on 2008-05-31.47 UT (Obs. 1) and 2008-07-15.70 UT (Obs. 2), both prior to the observation of Pietsch et al. (2008, Obs. 3)

Aims: We describe the discovery of an extremely wide pair of low-mass stars with a common large proper motion and discuss their possible membership in a Galactic halo stream crossing the Solar neighbourhood. Methods: In a high proper motion survey of the southern sky we used multi-epoch positions and photometry from the SuperCOSMOS Sky Surveys. New

In this contribution an Atmospheric Dispersion Corrector (ADC) developed for the FastCam project is presented. FastCam is a system based on 'lucky imaging' techniques for high spatial resolution, developed at the Instituto de Astrofisica de Canarias (IAC). The use of a system to correct the atmosphere's effects is necessary to obtain a good optics

A big challenge in solar and stellar physics in the coming years will be to decipher the magnetism of the solar outer atmosphere (chromosphere and corona) along with its dynamic coupling with the magnetic fields of the underlying photosphere. To this end, it is important to develop rigorous diagnostic tools for the physical interpretation of

The purpose of the Active Phasing Experiment, designed under the lead of ESO, is to study new phasing technologies and to validate wavefront control concepts for Extremely Large Telescopes. The Active Phasing Experiment is currently tested in the laboratory at the ESO headquarters and will be tested on sky at a Nasmyth focus of a VLT unit telescope