Narrow-angle astrometry with PRIMA
Abstract
The Extrasolar Planet Search with PRIMA project (ESPRI) aims at characterising and detecting extrasolar planets by measuring the host star's reflex motion using the narrow-angle astrometry capability of the PRIMA facility at the Very Large Telescope Interferometer. A first functional demonstration of the astrometric mode was achieved in early 2011. This marked the start of the astrometric commissioning phase with the purpose of characterising the instrument's performance, which ultimately has to be sufficient for exoplanet detection. We show results obtained from the observation of bright visual binary stars, which serve as test objects to determine the instrument's astrometric precision, its accuracy, and the plate scale. Finally, we report on the current status of the ESPRI project, in view of starting its scientific programme.
Keywords
Cite
@article{arxiv.1207.5510,
title = {Narrow-angle astrometry with PRIMA},
author = {J. Sahlmann and D. Ségransan and A. Mérand and N. Zimmerman and R. Abuter and B. Chazelas and F. Delplancke and T. Henning and A. Kaminski and R. Köhler and R. Launhardt and M. Mohler and F. Pepe and D. Queloz and A. Quirrenbach and S. Reffert and C. Schmid and N. Schuhler and T. Schulze-Hartung},
journal= {arXiv preprint arXiv:1207.5510},
year = {2015}
}
Comments
11 pages, 6 figures. To appear in the proceedings of the 2012 SPIE Conference "Astronomical Telescopes and Instrumentation"