CHARA array adaptive optics: Complex operational software and performance

Narsireddy Anugu; Theo Ten Brummelaar; Nils H. Turner; Matthew D. Anderson; Jean Baptiste Le Bouquin; Judit Sturmann; Laszlo Sturmann; Chris Farrington; Norm Vargas; Olli Majoinen; Michael J. Ireland; John D. Monnier; Denis Mourard; Gail Schaefer; Douglas R. Gies; Stephen T. Ridgway; Stefan Kraus; Cyril Petit; Michel Tallon; Caroline B. Lim; Philippe Berio

doi:10.1117/12.2561560

CHARA array adaptive optics: Complex operational software and performance

Narsireddy Anugu, Theo Ten Brummelaar, Nils H. Turner, Matthew D. Anderson, Jean Baptiste Le Bouquin, Judit Sturmann, Laszlo Sturmann, Chris Farrington, Norm Vargas, Olli Majoinen, Michael J. Ireland, John D. Monnier, Denis Mourard, Gail Schaefer, Douglas R. Gies, Stephen T. Ridgway, Stefan Kraus, Cyril Petit, Michel Tallon, Caroline B. LimPhilippe Berio

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

8 Scopus citations

Abstract

The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stellar imaging, binaries, and stellar diameters. However, to achieve ambitious observations of faint targets such as young stellar objects and active galactic nuclei, higher sensitivity is required. For that purpose, adaptive optics are developed to correct atmospheric turbulence and non-common path aberrations between each telescope and the beam combiner lab. This paper describes the AO software and its integration into the CHARA system. We also report initial on-sky tests that demonstrate an increase of scientific throughput by sensitivity gain and by extending useful observing time in worse seeing conditions. Our 6 telescopes and 12 AO systems with tens of critical alignments and control loops pose challenges in operation. We describe our methods enabling a single scientist to operate the entire system.

Original language	English (US)
Title of host publication	Optical and Infrared Interferometry and Imaging VII
Editors	Peter G. Tuthill, Antoine Merand, Stephanie Sallum
Publisher	SPIE
ISBN (Electronic)	9781510636798
DOIs	https://doi.org/10.1117/12.2561560
State	Published - 2020
Externally published	Yes
Event	Optical and Infrared Interferometry and Imaging VII 2020 - Virtual, Online, United States Duration: Dec 14 2020 → Dec 22 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11446
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Optical and Infrared Interferometry and Imaging VII 2020
Country/Territory	United States
City	Virtual, Online
Period	12/14/20 → 12/22/20

Bibliographical note

Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Keywords

Adaptive optics
CHARA
EMCCD
Long baseline interferometry
Shack-Hartmann
Wavefront sensor

Publisher link

10.1117/12.2561560

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Anugu, N., Ten Brummelaar, T., Turner, N. H., Anderson, M. D., Le Bouquin, J. B., Sturmann, J., Sturmann, L., Farrington, C., Vargas, N., Majoinen, O., Ireland, M. J., Monnier, J. D., Mourard, D., Schaefer, G., Gies, D. R., Ridgway, S. T., Kraus, S., Petit, C., Tallon, M., ... Berio, P. (2020). CHARA array adaptive optics: Complex operational software and performance. In P. G. Tuthill, A. Merand, & S. Sallum (Eds.), Optical and Infrared Interferometry and Imaging VII Article 1144622 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11446). SPIE. https://doi.org/10.1117/12.2561560

CHARA array adaptive optics: Complex operational software and performance. / Anugu, Narsireddy; Ten Brummelaar, Theo; Turner, Nils H. et al.
Optical and Infrared Interferometry and Imaging VII. ed. / Peter G. Tuthill; Antoine Merand; Stephanie Sallum. SPIE, 2020. 1144622 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11446).

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

Anugu, N, Ten Brummelaar, T, Turner, NH, Anderson, MD, Le Bouquin, JB, Sturmann, J, Sturmann, L, Farrington, C, Vargas, N, Majoinen, O, Ireland, MJ, Monnier, JD, Mourard, D, Schaefer, G, Gies, DR, Ridgway, ST, Kraus, S, Petit, C, Tallon, M, Lim, CB & Berio, P 2020, CHARA array adaptive optics: Complex operational software and performance. in PG Tuthill, A Merand & S Sallum (eds), Optical and Infrared Interferometry and Imaging VII., 1144622, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11446, SPIE, Optical and Infrared Interferometry and Imaging VII 2020, Virtual, Online, United States, 12/14/20. https://doi.org/10.1117/12.2561560

Anugu N, Ten Brummelaar T, Turner NH, Anderson MD, Le Bouquin JB, Sturmann J et al. CHARA array adaptive optics: Complex operational software and performance. In Tuthill PG, Merand A, Sallum S, editors, Optical and Infrared Interferometry and Imaging VII. SPIE. 2020. 1144622. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2561560

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abstract = "The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stellar imaging, binaries, and stellar diameters. However, to achieve ambitious observations of faint targets such as young stellar objects and active galactic nuclei, higher sensitivity is required. For that purpose, adaptive optics are developed to correct atmospheric turbulence and non-common path aberrations between each telescope and the beam combiner lab. This paper describes the AO software and its integration into the CHARA system. We also report initial on-sky tests that demonstrate an increase of scientific throughput by sensitivity gain and by extending useful observing time in worse seeing conditions. Our 6 telescopes and 12 AO systems with tens of critical alignments and control loops pose challenges in operation. We describe our methods enabling a single scientist to operate the entire system.",

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author = "Narsireddy Anugu and {Ten Brummelaar}, Theo and Turner, {Nils H.} and Anderson, {Matthew D.} and {Le Bouquin}, {Jean Baptiste} and Judit Sturmann and Laszlo Sturmann and Chris Farrington and Norm Vargas and Olli Majoinen and Ireland, {Michael J.} and Monnier, {John D.} and Denis Mourard and Gail Schaefer and Gies, {Douglas R.} and Ridgway, {Stephen T.} and Stefan Kraus and Cyril Petit and Michel Tallon and Lim, {Caroline B.} and Philippe Berio",

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doi = "10.1117/12.2561560",

language = "English (US)",

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AU - Le Bouquin, Jean Baptiste

AU - Sturmann, Judit

AU - Sturmann, Laszlo

AU - Farrington, Chris

AU - Vargas, Norm

AU - Majoinen, Olli

AU - Ireland, Michael J.

AU - Monnier, John D.

AU - Mourard, Denis

AU - Schaefer, Gail

AU - Gies, Douglas R.

AU - Ridgway, Stephen T.

AU - Kraus, Stefan

AU - Petit, Cyril

AU - Tallon, Michel

AU - Lim, Caroline B.

AU - Berio, Philippe

PY - 2020

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N2 - The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stellar imaging, binaries, and stellar diameters. However, to achieve ambitious observations of faint targets such as young stellar objects and active galactic nuclei, higher sensitivity is required. For that purpose, adaptive optics are developed to correct atmospheric turbulence and non-common path aberrations between each telescope and the beam combiner lab. This paper describes the AO software and its integration into the CHARA system. We also report initial on-sky tests that demonstrate an increase of scientific throughput by sensitivity gain and by extending useful observing time in worse seeing conditions. Our 6 telescopes and 12 AO systems with tens of critical alignments and control loops pose challenges in operation. We describe our methods enabling a single scientist to operate the entire system.

AB - The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stellar imaging, binaries, and stellar diameters. However, to achieve ambitious observations of faint targets such as young stellar objects and active galactic nuclei, higher sensitivity is required. For that purpose, adaptive optics are developed to correct atmospheric turbulence and non-common path aberrations between each telescope and the beam combiner lab. This paper describes the AO software and its integration into the CHARA system. We also report initial on-sky tests that demonstrate an increase of scientific throughput by sensitivity gain and by extending useful observing time in worse seeing conditions. Our 6 telescopes and 12 AO systems with tens of critical alignments and control loops pose challenges in operation. We describe our methods enabling a single scientist to operate the entire system.

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KW - CHARA

KW - EMCCD

KW - Long baseline interferometry

KW - Shack-Hartmann

KW - Wavefront sensor

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BT - Optical and Infrared Interferometry and Imaging VII

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ER -

CHARA array adaptive optics: Complex operational software and performance

Abstract

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Bibliographical note

Keywords

Publisher link

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