GNOSIS: an OH suppression unit for near-infrared spectrographs

S. C. Ellis, J. Bland-Hawthorn, J. S. Lawrence, J. Bryant, R. Haynes, A. Horton, S. Lee, S. Leon-Saval, Hans Gerd Löhmannsröben, J. Mladenoff, J. O'Byrne, W. Rambold, M. Roth, C. Trinh

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionResearchpeer-review

Abstract

GNOSIS is an OH suppression unit to be used in conjunction with existing spectrographs. The OH suppression is achieved using fibre Bragg gratings (FBGs), and will deliver the darkest near-infrared background of any ground-based instrument. Laboratory and on-sky tests demonstrate that FBGs can suppress OH lines by 30dB whilst maintaing > 90% throughput between the lines, resulting in a ≈ 4 mag decrease in the background. In the first implementation GNOSIS will feed IRIS2 on the AAT. It will consist of a seven element lenslet array, covering ≈ 1.4″ on the sky, and will suppress the 103 brightest OH lines between 1.47 and 1.70 μm. Future upgrades will include J-band suppression and implementation on an 8m telescope.

LanguageEnglish
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy III
EditorsIan S. McLean, Suzanne K. Ramsay, Hideki Takami
Place of PublicationBellingham, WA
PublisherSPIE
Pages773516-1-773516-10
Number of pages10
ISBN (Print)9780819482259
DOIs
Publication statusPublished - 2010
EventGround-Based and Airborne Instrumentation for Astronomy III - San Diego, CA, United States
Duration: 27 Jun 20102 Jul 2010

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume7735
ISSN (Print)0277-786X

Other

OtherGround-Based and Airborne Instrumentation for Astronomy III
CountryUnited States
CitySan Diego, CA
Period27/06/102/07/10

Fingerprint

Infrared spectrographs
Spectrograph
Fiber Bragg gratings
spectrographs
Infrared
retarding
Fiber Grating
Bragg Grating
Bragg gratings
Unit
Spectrographs
sky
Line
Covering Array
Telescopes
fibers
Throughput
Infrared radiation
Telescope
coverings

Bibliographical note

Copyright 2010 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Cite this

Ellis, S. C., Bland-Hawthorn, J., Lawrence, J. S., Bryant, J., Haynes, R., Horton, A., ... Trinh, C. (2010). GNOSIS: an OH suppression unit for near-infrared spectrographs. In I. S. McLean, S. K. Ramsay, & H. Takami (Eds.), Ground-Based and Airborne Instrumentation for Astronomy III (pp. 773516-1-773516-10). [773516] (Proceedings of SPIE; Vol. 7735). Bellingham, WA: SPIE. https://doi.org/10.1117/12.856348
Ellis, S. C. ; Bland-Hawthorn, J. ; Lawrence, J. S. ; Bryant, J. ; Haynes, R. ; Horton, A. ; Lee, S. ; Leon-Saval, S. ; Löhmannsröben, Hans Gerd ; Mladenoff, J. ; O'Byrne, J. ; Rambold, W. ; Roth, M. ; Trinh, C. / GNOSIS : an OH suppression unit for near-infrared spectrographs. Ground-Based and Airborne Instrumentation for Astronomy III. editor / Ian S. McLean ; Suzanne K. Ramsay ; Hideki Takami. Bellingham, WA : SPIE, 2010. pp. 773516-1-773516-10 (Proceedings of SPIE).
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abstract = "GNOSIS is an OH suppression unit to be used in conjunction with existing spectrographs. The OH suppression is achieved using fibre Bragg gratings (FBGs), and will deliver the darkest near-infrared background of any ground-based instrument. Laboratory and on-sky tests demonstrate that FBGs can suppress OH lines by 30dB whilst maintaing > 90{\%} throughput between the lines, resulting in a ≈ 4 mag decrease in the background. In the first implementation GNOSIS will feed IRIS2 on the AAT. It will consist of a seven element lenslet array, covering ≈ 1.4″ on the sky, and will suppress the 103 brightest OH lines between 1.47 and 1.70 μm. Future upgrades will include J-band suppression and implementation on an 8m telescope.",
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Ellis, SC, Bland-Hawthorn, J, Lawrence, JS, Bryant, J, Haynes, R, Horton, A, Lee, S, Leon-Saval, S, Löhmannsröben, HG, Mladenoff, J, O'Byrne, J, Rambold, W, Roth, M & Trinh, C 2010, GNOSIS: an OH suppression unit for near-infrared spectrographs. in IS McLean, SK Ramsay & H Takami (eds), Ground-Based and Airborne Instrumentation for Astronomy III., 773516, Proceedings of SPIE, vol. 7735, SPIE, Bellingham, WA, pp. 773516-1-773516-10, Ground-Based and Airborne Instrumentation for Astronomy III, San Diego, CA, United States, 27/06/10. https://doi.org/10.1117/12.856348

GNOSIS : an OH suppression unit for near-infrared spectrographs. / Ellis, S. C.; Bland-Hawthorn, J.; Lawrence, J. S.; Bryant, J.; Haynes, R.; Horton, A.; Lee, S.; Leon-Saval, S.; Löhmannsröben, Hans Gerd; Mladenoff, J.; O'Byrne, J.; Rambold, W.; Roth, M.; Trinh, C.

Ground-Based and Airborne Instrumentation for Astronomy III. ed. / Ian S. McLean; Suzanne K. Ramsay; Hideki Takami. Bellingham, WA : SPIE, 2010. p. 773516-1-773516-10 773516 (Proceedings of SPIE; Vol. 7735).

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionResearchpeer-review

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BT - Ground-Based and Airborne Instrumentation for Astronomy III

PB - SPIE

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ER -

Ellis SC, Bland-Hawthorn J, Lawrence JS, Bryant J, Haynes R, Horton A et al. GNOSIS: an OH suppression unit for near-infrared spectrographs. In McLean IS, Ramsay SK, Takami H, editors, Ground-Based and Airborne Instrumentation for Astronomy III. Bellingham, WA: SPIE. 2010. p. 773516-1-773516-10. 773516. (Proceedings of SPIE). https://doi.org/10.1117/12.856348