The CCD meridian circle of San Fernando (CMASF) is installed in the Carlos U. Cesco observatory in San Juan (Argentina) at 69° W, 31° S and 2300 m of altitude. It is operated jointly by the Real Instituto y Observatorio de la Armada (ROA) and the Observatorio Astronómico Félix Aguilar (OAFA). In December 1999, a CCD camera was installed in the

We explore the use of integral field spectroscopy (IFS) for observing extrasolar planet transits. Although this technique should find its full potential in space-based observations (e.g., James Webb Space Telescope, Terrestrial Planet Finder), we have tested its basics with ground-based time-series observations of HD 209458b obtained with the

Evolution of stellar bars in disk galaxies is accompanied by dynamical instabilities and secular changes. Following the vertical buckling instability, the bars are known to weaken dramatically and develop a pronounced boxy/peanut shape when observed edge-on. Using high-resolution N-body simulations of stellar disks embedded in live axisymmetric

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Un tránsito de una exoplaneta ocurre cuando este se interpone entre el observador y la estrella en torno a la cual órbita. La disminución en el flujo de la estrella que provoca nos permite conocer ciertos parámetros orbitales y algunas características físicas del planeta que son inaccesibles mediante otras técnicas. LA diversidad de estudios

We have developed a new technique to decouple the spectra of the host and the nucleus of type I AGNs using integral field spectroscopy data. The technique is a simple extension of methods widely tested in 2D imaging. We present here the results from applying the technique to data taken with INTEGRAL at the 4.2 m William Herschel Telescope on the