Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

Julian C. Christou; Maxime Boccas; Angelic Ebbers; Richard M. McDermid; Richard Oram; Chadwick Trujillo; Brian Walls

doi:10.1117/12.925507

Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

Julian C. Christou^*, Maxime Boccas, Angelic Ebbers, Richard M. McDermid, Richard Oram, Chadwick Trujillo, Brian Walls

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25" which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1" - 0.2" making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.

Original language	English
Title of host publication	Adaptive Optics Systems III
Editors	Brent L. Ellerbroek, Enrico Marchetti, Jean-Pierre VeÌran
Place of Publication	Bellingham, WA
Publisher	SPIE
Pages	1-8
Number of pages	8
Volume	8447
ISBN (Print)	9780819491480
DOIs	https://doi.org/10.1117/12.925507
Publication status	Published - 2012
Externally published	Yes
Event	Adaptive Optics Systems III - Amsterdam, Netherlands Duration: 1 Jul 2012 → 6 Jul 2012

Other

Other	Adaptive Optics Systems III
Country/Territory	Netherlands
City	Amsterdam
Period	1/07/12 → 6/07/12

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Cite this

@inproceedings{48a926c515f74d5bb4c5e17ce36572e9,

title = "Increasing sky coverage with the Gemini North ALTAIR/LGS AO system",

abstract = "The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25{"} which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1{"} - 0.2{"} making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.",

author = "Christou, {Julian C.} and Maxime Boccas and Angelic Ebbers and McDermid, {Richard M.} and Richard Oram and Chadwick Trujillo and Brian Walls",

year = "2012",

doi = "10.1117/12.925507",

language = "English",

isbn = "9780819491480",

volume = "8447",

pages = "1--8",

editor = "Ellerbroek, {Brent L.} and Enrico Marchetti and Jean-Pierre Ve{\`I}ran",

booktitle = "Adaptive Optics Systems III",

publisher = "SPIE",

address = "United States",

note = "Adaptive Optics Systems III ; Conference date: 01-07-2012 Through 06-07-2012",

}

Christou, JC, Boccas, M, Ebbers, A, McDermid, RM, Oram, R, Trujillo, C & Walls, B 2012, Increasing sky coverage with the Gemini North ALTAIR/LGS AO system. in BL Ellerbroek, E Marchetti & J-P VeÌran (eds), Adaptive Optics Systems III. vol. 8447, 84473E, SPIE, Bellingham, WA, pp. 1-8, Adaptive Optics Systems III, Amsterdam, Netherlands, 1/07/12. https://doi.org/10.1117/12.925507

Increasing sky coverage with the Gemini North ALTAIR/LGS AO system. / Christou, Julian C.; Boccas, Maxime; Ebbers, Angelic et al.
Adaptive Optics Systems III. ed. / Brent L. Ellerbroek; Enrico Marchetti; Jean-Pierre VeÌran. Vol. 8447 Bellingham, WA: SPIE, 2012. p. 1-8 84473E.

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

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T1 - Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

AU - Christou, Julian C.

AU - Boccas, Maxime

AU - Ebbers, Angelic

AU - McDermid, Richard M.

AU - Oram, Richard

AU - Trujillo, Chadwick

AU - Walls, Brian

PY - 2012

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N2 - The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25" which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1" - 0.2" making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.

AB - The Gemini North (GN) AO system, Altair, has been routinely operating in LGS mode since 2007. Due to the initial optical design, the NGS field-of-view (FoV) is limited to a radius ~ 25" which limits the potential science. To improve this, we have tested the AO/LGS operation using a peripheral wavefront sensor (PWFS) whose patrol field is ~ 4'-7' from the target. This expanded NGS FoV permits greater sky coverage but with decreased resolution, FWHM ~ 0.1" - 0.2" making this mode very suitable for non-imaging spectrographic and integral field unit observations. We present the hardware and software upgrades to PWFS and Altair as well as the software necessary for making this observing mode a routine and integral part of GN operations. Characterization and performance of this new operation mode, known as LGS+P1, are presented.

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AN - SCOPUS:84871815808

SN - 9780819491480

VL - 8447

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BT - Adaptive Optics Systems III

A2 - Ellerbroek, Brent L.

A2 - Marchetti, Enrico

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CY - Bellingham, WA

T2 - Adaptive Optics Systems III

Y2 - 1 July 2012 through 6 July 2012

ER -

Increasing sky coverage with the Gemini North ALTAIR/LGS AO system

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