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GNOSIS: a novel near-infrared OH suppression unit at the AAT

Year: 2012
Type: conference-paper
Abstract: GNOSIS has provided the first on-telescope demonstration of a concept to utilize complex aperioidc fiber Bragg gratings to suppress the 103 brightest atmospheric hydroxyl emission doublets between 1.47-1.7 μm. The unit is designed to be used at the 3.9-meter Anglo-Australian Telescope (AAT) feeding the IRIS2 spectrograph. Unlike previous atmospheric suppression techniques GNOSIS suppresses the lines before dispersion. We present the results of laboratory and on-sky tests from instrument commissioning. These tests reveal excellent suppression performance by the gratings and high inter-notch throughput, which combine to produce high fidelity OH-free spectra.
DOI: 10.1117/12.926483
Authors: C. Q. Trinh, S. C. Ellis, J. S. Lawrence, A. J. Horton, J. Bland-Hawthorn, S. G. Leon-Saval, J. Bryant, S. Case, M. Colless, W. Couch, K. Freeman, L. Gers, K. Glazebrook, R. Haynes, S. Lee, H.-G. Löhmannsröben, S. Miziarski, J. O'Byrne, W. Rambold, M. M. Roth, B. Schmidt, K. Shortridge, S. Smedley, C. G. Tinney, P. Xavier, J. Zheng
Institutions: The University of Sydney, Australian Astronomical Observatory, ARC Centre of Excellence for All-sky Astrophysics, Swinburne University of Technology, Australian National University, Leibniz Institute for Astrophysics Potsdam, University of Potsdam
Language: English
Subfield: Instrumentation
Open Access status: bronze
OpenAlex ID: W2197864569
FWCI: 0.978
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Cited by: 6
Related to: 10