12 September 2012 Narrow-angle astrometry with PRIMA
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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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Sahlmann, J. Sahlmann, D. Ségransan, D. Ségransan, A. Mérand, A. Mérand, N. Zimmerman, N. Zimmerman, R. Abuter, R. Abuter, B. Chazelas, B. Chazelas, F. Delplancke, F. Delplancke, T. Henning, T. Henning, A. Kaminski, A. Kaminski, R. Köhler, R. Köhler, R. Launhardt, R. Launhardt, M. Mohler, M. Mohler, F. Pepe, F. Pepe, D. Queloz, D. Queloz, A. Quirrenbach, A. Quirrenbach, S. Reffert, S. Reffert, C. Schmid, C. Schmid, N. Schuhler, N. Schuhler, T. Schulze-Hartung, T. Schulze-Hartung, "Narrow-angle astrometry with PRIMA", Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450S (12 September 2012); doi: 10.1117/12.926214; https://doi.org/10.1117/12.926214


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