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

J. Woillez, P. Wizinowich, R. Akeson, M. Colavita, Joshua A 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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 languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8445
DOIs
StatePublished - 2012
EventOptical and Infrared Interferometry III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Other

OtherOptical and Infrared Interferometry III
CountryNetherlands
CityAmsterdam
Period7/1/127/6/12

Fingerprint

Phase Field
Interferometer
Interferometers
interferometers
Stars
Turbulence
turbulence
Laser Guide Star
laser guide stars
Target
Atmospheric turbulence
Atmospheric Turbulence
atmospheric turbulence
Time Integration
Atmosphere
sky
Baseline
Star
Time Scales
Demonstrations

Keywords

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

ASJC Scopus subject areas

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

Cite this

Woillez, J., Wizinowich, P., Akeson, R., Colavita, M., Eisner, J. A., Millan-Gabet, R., ... Wetherell, E. (2012). First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8445). [84450E] 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, Joshua A; 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.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8445 2012. 84450E.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Woillez, J, Wizinowich, P, Akeson, R, Colavita, M, Eisner, JA, 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 Proceedings of SPIE - The International Society for Optical Engineering. vol. 8445, 84450E, 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 JA, Millan-Gabet R et al. First faint Dual-Field Phase-Referenced observations on the Keck Interferometer. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8445. 2012. 84450E https://doi.org/10.1117/12.926404
Woillez, J. ; Wizinowich, P. ; Akeson, R. ; Colavita, M. ; Eisner, Joshua A ; 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. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8445 2012.
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