Abstract
Although primarily intended as a test and alignment instrument in order to commission the VLTI, VINCI has taken useful scientific data in its first year and a half of operation. Our results employ coherent integration of fringe visibility in which the actual amplitudes of the raw scans are combined linearly after correcting for the position of the fringe within each scan. In addition to reducing the effect of noise compared to incoherent integration, the result contains a broader range of information, including an estimate of the complex visibility spectrum. Such an estimator is thus sensitive to instrumental phase and spectral characteristics, including the variable component of dispersion introduced by the excess air paths in the delay lines. Calibration of such instrumental effects demonstrates the ability to detect source phase at a fine level as will be required for direct interferometric detection of extrasolar planets. We present diameters for five stars obtained by observing the visibility null in their correlated spectra. Using coherent integration we have also observed the peculiar correlated spectra seen in many Mira variables, possibly due to changes in the apparent diameter with wavelength. Calibration of the zero-baseline power from o Ceti is used with other interferometric observations of this star over a period of 90 days to plot diameter variations associated with its pulsation cycle.
VINCI data included herein is based on observations made with the European Southern Observatory telescopes obtained from the ESO/ST-ECF Science Archive Facility.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Coude Du Foresto, V., Perrin, G., Ruilier, C., Mennesson, B.P., Traub, W.A. and Lacasse, M.G.: 1998, FLUOR fibered instrument at the IOTA interferometer, in: Robert D. Reasenberg (ed.), Astronomical Interferometry,Proc. SPIE 3350, pp. 856–863.
Coude Du Foresto, V., Ridgway, S. and Mariotti, J.-M.: 1997, Deriving object visibilities from interferograms obtained with a fiber stellar interferometer, Astronomy and Astrophysics Supplement series 121, 379–392.
Kervella, P., Coude du Foresto, V., Glindemann, A. and Hofmann, R.: 2000, VINCI: the VLT Interferometer commissioning instrument, in: P.J. Lena and A. Quirrenbach (eds.), Interferometry in Optical Astronomy, Proc. SPIE 4006, pp. 31–42.
Meisner, J. and Le Poole, R.: 2002, Dispersion affecting the VLTI and 10 micron interferometry using MIDI, in: Interferometry for Optical Astronomy II, Proc. SPIE 4838.
Mennesson, B., Perrin, G., Chagnon, G., Foresto, V.C.d., Ridgway, S., Merand, A., Salome, P., Borde, P., Cotton, W., Morel, S., Kervella, P., Traub, W. and Lacasse, M.: 2002, Evidence for very extended gaseous layers around 0-rich Mira variables and M giants, Ai 579, 446–454.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2003 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Meisner, J.A. (2003). Scientific and Technical Results from VINCI Using Coherent Estimation of Fringe Visibility. In: Garcia, P.J.V., Glindemann, A., Henning, T., Malbet, F. (eds) The Very Large Telescope Interferometer Challenges for the Future. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0157-0_13
Download citation
DOI: https://doi.org/10.1007/978-94-017-0157-0_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-6379-3
Online ISBN: 978-94-017-0157-0
eBook Packages: Springer Book Archive