Toward complex visibilities using optical interferometry: multiwavelength phase referencing

Thomas A. Pauls; Henrique R. Schmitt; Christopher Tycner; J. Thomas Armstrong; James A. Benson; James H. Clark; G. Charmaine Gilbreath; Robert B. Hindsley; Donald J. Hutter; Anders M. Jorgensen

doi:10.1117/12.671881

27 June 2006 Toward complex visibilities using optical interferometry: multiwavelength phase referencing

Thomas A. Pauls, Henrique R. Schmitt, Christopher Tycner, J. Thomas Armstrong, James A. Benson, James H. Clark, G. Charmaine Gilbreath, Robert B. Hindsley, Donald J. Hutter, Anders M. Jorgensen

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 62680W (2006) https://doi.org/10.1117/12.671881
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We report on experiments in multi-wavelength phase referencing using the Navy Prototype Optical Interferometer (NPOI). In these experiments we use the unique capability of the NPOI to simultaneously observe 16 spectral channels covering 512-850 nm on multiple baselines simultaneously. We present observations of the well-known Be star ζ Tauri using custom filters which allow us to isolate the Hα line in a single spectral channel while the other channels observe the stellar continuum. Since the central star is unresolved, we can use the data in the continuum channels to calibrate the spectral line data. Using the phase information recovered in this way, it is possible for the first time to use standard techniques to construct simple images of the line-emitting region around the star.

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Thomas A. Pauls, Henrique R. Schmitt, Christopher Tycner, J. Thomas Armstrong, James A. Benson, James H. Clark, G. Charmaine Gilbreath, Robert B. Hindsley, Donald J. Hutter, and Anders M. Jorgensen "Toward complex visibilities using optical interferometry: multiwavelength phase referencing", Proc. SPIE 6268, Advances in Stellar Interferometry, 62680W (27 June 2006); https://doi.org/10.1117/12.671881

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