Mario Gilberto Lattanzi

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The Guide Star Catalog II (GSC-II) is an all-sky database of objects derived from the un-compressed Digitized Sky Surveys that the Space Telescope Science Institute has created from the Palomar and UK Schmidt survey plates and made available to the community. Like its predecessor (GSC-I), the GSC-II was primarily created to provide guide star information(More)
A general relativistic scenario is utilized to build a non-perturbative model, in Schwarzschild metric, for the representation of observed angles among star pairs. This model is then applied to an end-to-end simulation of the GAIA satellite , a concept for global astrometry within the 2000+ scientific program of the European Space Agency. GAIA is expected(More)
We evaluate the potential of the ESA Cornerstone Mission GAIA in helping populate the database of nearby stars (d < 25 pc) for subsequent target selection for DARWIN/TPF. The GAIA high-precision astrometric measurements will make it an ideal tool for a complete screening of the expected several thousands stars within 25 pc in order to identify and(More)
A decade after the publication of the Hipparcos Catalogue, the Space Interfer-ometry Mission (SIM) will be capable of making selected high-precision astrometric measurements about three orders of magnitude more accurate than the Hipparcos survey. We present results from a detailed set of end-to-end numerical simulations of SIM narrow-angle astrometric(More)
—Gaia is an ambitious space mission of the European Space Agency which will chart a three-dimensional map the Milky Way to study the composition formation and evolution of our Galaxy. Our research team is developing the AVU-GSR verification module, aiming to obtain a reconstruction of the celestial sphere using a subset of GAIA observations. The authors(More)
Aims. Chromatic effects are usually associated with refractive optics, and reflective telescopes are assumed to be free from them. We show that all-reflective optics still bears significant levels of such perturbations, especially critical to modern micro-arcsecond astrometric experiments. Methods. We analyze the image formation and measurement process to(More)
The proposed global astrometry mission GAIA, recently recommended within the context of ESA's Horizon 2000 Plus long-term scientific program, appears capable of surveying the solar neighborhood within ∼ 200 pc for the astrometric signatures of planets around stars down to the magnitude limit of V =17 mag, which includes late M dwarfs at 100 pc. Realistic(More)
Aims. The scope of this paper is twofold. First, it describes the simulation scenarios and the results of a large-scale, double-blind test campaign carried out to estimate the potential of Gaia for detecting and measuring planetary systems. The identified capabilities are then put in context by highlighting the unique contribution that the Gaia exoplanet(More)
We examine the positions and proper motions of a sample of OB Hipparcos stars for evidence of the warp in our galaxy. This examination is carried out by a comparison of the observations with a sophisticated simulation of the galaxy discussed in Drimmel et al. (1997). The spatial distribution of these early type stars in the galaxy connrms a warped(More)
We use detailed numerical simulations and the υ Andromedae planetary system as a template to evaluate the capability of the ESA Cornerstone Mission GAIA in detecting and measuring multiple planets around solar-type stars in the neighborhood of the Solar System. For the outer two planets of the υ Andromedae system, GAIA high-precision global astrometric(More)