First faint Dual-Field Phase-Referenced observations on the Keck Interferometer

J. Woillez; P. Wizinowich; R. Akeson; M. Colavita; J. Eisner; R. Millan-Gabet; J. Monnier; J. U. Pott; S. Ragland; E. Appleby; A. Cooper; C. Felizardo; J. Herstein; O. Martin; D. Medeiros; D. Morrison; T. Panteleeva; B. Smith; K. Summers; K. Tsubota; C. Tyau; E. Wetherell

doi:10.1117/12.926404

First faint Dual-Field Phase-Referenced observations on the Keck Interferometer

J. Woillez, P. Wizinowich, R. Akeson, M. Colavita, J. Eisner, R. Millan-Gabet, J. Monnier, J. U. Pott, S. Ragland, E. Appleby, A. Cooper, C. Felizardo, J. Herstein, O. Martin, D. Medeiros, D. Morrison, T. Panteleeva, B. Smith, K. Summers, K. TsubotaC. Tyau, E. Wetherell

Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

Ground-based long baseline interferometers have long been limited in sensitivity by the short integration periods imposed by atmospheric turbulence. The first observation fainter than this limit was performed on January 22, 2011 when the Keck Interferometer observed a K=11.5 target, about one magnitude fainter than its K=10.3 limit. This observation was made possible by the Dual Field Phase Referencing instrument of the ASTRA project: simultaneously measuring the real-time effects of the atmosphere on a nearby bright guide star, and correcting for it on the faint target, integration time longer than the turbulence time scale are made possible. As a prelude tóthis demonstration, we first present the implementation of Dual Field Phase Referencing on the interferometer. We then detail its on-sky performance focusing on the accuracy of the turbulence correction, and on the resulting fringe contrast stability. We conclude with a presentation of early results obtained with Laser Guide Star AO and the interferometer.

Original language	English (US)
Title of host publication	Optical and Infrared Interferometry III
DOIs	https://doi.org/10.1117/12.926404
State	Published - 2012
Event	Optical and Infrared Interferometry III - Amsterdam, Netherlands Duration: Jul 1 2012 → Jul 6 2012

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8445
ISSN (Print)	0277-786X

Other

Other	Optical and Infrared Interferometry III
Country	Netherlands
City	Amsterdam
Period	7/1/12 → 7/6/12

Keywords

Dual field phase referencing
Laser guide star adaptive optics
Optical long baseline interferometry

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.926404

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Woillez, J., Wizinowich, P., Akeson, R., Colavita, M., Eisner, J., Millan-Gabet, R., Monnier, J., Pott, J. U., Ragland, S., Appleby, E., Cooper, A., Felizardo, C., Herstein, J., Martin, O., Medeiros, D., Morrison, D., Panteleeva, T., Smith, B., Summers, K., ... Wetherell, E. (2012). First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. In Optical and Infrared Interferometry III [84450E] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8445). https://doi.org/10.1117/12.926404

First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. / Woillez, J.; Wizinowich, P.; Akeson, R.; Colavita, M.; Eisner, J.; Millan-Gabet, R.; Monnier, J.; Pott, J. U.; Ragland, S.; Appleby, E.; Cooper, A.; Felizardo, C.; Herstein, J.; Martin, O.; Medeiros, D.; Morrison, D.; Panteleeva, T.; Smith, B.; Summers, K.; Tsubota, K.; Tyau, C.; Wetherell, E.

Optical and Infrared Interferometry III. 2012. 84450E (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8445).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Woillez, J, Wizinowich, P, Akeson, R, Colavita, M, Eisner, J, Millan-Gabet, R, Monnier, J, Pott, JU, Ragland, S, Appleby, E, Cooper, A, Felizardo, C, Herstein, J, Martin, O, Medeiros, D, Morrison, D, Panteleeva, T, Smith, B, Summers, K, Tsubota, K, Tyau, C & Wetherell, E 2012, First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. in Optical and Infrared Interferometry III., 84450E, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8445, Optical and Infrared Interferometry III, Amsterdam, Netherlands, 7/1/12. https://doi.org/10.1117/12.926404

Woillez, J. ; Wizinowich, P. ; Akeson, R. ; Colavita, M. ; Eisner, J. ; Millan-Gabet, R. ; Monnier, J. ; Pott, J. U. ; Ragland, S. ; Appleby, E. ; Cooper, A. ; Felizardo, C. ; Herstein, J. ; Martin, O. ; Medeiros, D. ; Morrison, D. ; Panteleeva, T. ; Smith, B. ; Summers, K. ; Tsubota, K. ; Tyau, C. ; Wetherell, E. / First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. Optical and Infrared Interferometry III. 2012. (Proceedings of SPIE - The International Society for Optical Engineering).

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AU - Eisner, J.

AU - Millan-Gabet, R.

AU - Monnier, J.

AU - Pott, J. U.

AU - Ragland, S.

AU - Appleby, E.

AU - Cooper, A.

AU - Felizardo, C.

AU - Herstein, J.

AU - Martin, O.

AU - Medeiros, D.

AU - Morrison, D.

AU - Panteleeva, T.

AU - Smith, B.

AU - Summers, K.

AU - Tsubota, K.

AU - Tyau, C.

AU - Wetherell, E.

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N2 - Ground-based long baseline interferometers have long been limited in sensitivity by the short integration periods imposed by atmospheric turbulence. The first observation fainter than this limit was performed on January 22, 2011 when the Keck Interferometer observed a K=11.5 target, about one magnitude fainter than its K=10.3 limit. This observation was made possible by the Dual Field Phase Referencing instrument of the ASTRA project: simultaneously measuring the real-time effects of the atmosphere on a nearby bright guide star, and correcting for it on the faint target, integration time longer than the turbulence time scale are made possible. As a prelude tóthis demonstration, we first present the implementation of Dual Field Phase Referencing on the interferometer. We then detail its on-sky performance focusing on the accuracy of the turbulence correction, and on the resulting fringe contrast stability. We conclude with a presentation of early results obtained with Laser Guide Star AO and the interferometer.

AB - Ground-based long baseline interferometers have long been limited in sensitivity by the short integration periods imposed by atmospheric turbulence. The first observation fainter than this limit was performed on January 22, 2011 when the Keck Interferometer observed a K=11.5 target, about one magnitude fainter than its K=10.3 limit. This observation was made possible by the Dual Field Phase Referencing instrument of the ASTRA project: simultaneously measuring the real-time effects of the atmosphere on a nearby bright guide star, and correcting for it on the faint target, integration time longer than the turbulence time scale are made possible. As a prelude tóthis demonstration, we first present the implementation of Dual Field Phase Referencing on the interferometer. We then detail its on-sky performance focusing on the accuracy of the turbulence correction, and on the resulting fringe contrast stability. We conclude with a presentation of early results obtained with Laser Guide Star AO and the interferometer.

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