ESPRI data-reduction strategy and error budget for PRIMA

Tubbs, R. ; Elias, N. M. ; Launhardt, R. ; Reffert, S. ; Delplancke, F. ; Quirrenbach, A. ; Henning, T. ; Queloz, D.

In: Proceedings of the International Astronomical Union, 2007, vol. 3, no. S248, p. 132-133

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    The Exoplanet Search with PRIma (ESPRI) will use the PRIMA dual-feed astrometric capability on the Very Large Telescope Interferometer (VLTI) to perform astrometric detections of extra-solar planets. We present an overview of our data-reduction strategy for achieving 10-μarcsecond accuracy narrow-angle astrometry using the PRIMA instrument. We discuss the error budget for astrometric measurements, and those aspects of our strategy which are designed to minimise the astrometric measurement errors