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The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric precision and ghost analysis

Rundquist, Nils-Erik and Walth, Gregory and Wright, Shelley A. and Suzuki, Ryuji and Do, Tuan and Chapin, Edward L. and Chisholm, Eric and Dunn, Jennifer and Hayano, Yutaka and Johnson, Chris and Larkin, James E. and Riddle, Reed L. and Schöck, Matthias and Sohn, Ji Man (2018) The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric precision and ghost analysis. In: Ground-based and Airborne Instrumentation for Astronomy VII. Proceedings of SPIE. No.10702. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 10702A7. ISBN 9781510619579. http://resolver.caltech.edu/CaltechAUTHORS:20190103-153503299

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Abstract

The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the Thirty Meter Telescope (TMT) that will be used to sample the corrected adaptive optics field by NFIRAOS with a near-infrared (0.8 - 2.4 µm) imaging camera and Integral Field Spectrograph (IFS). In order to understand the science case specifications of the IRIS instrument, we use the IRIS data simulator to characterize photometric precision and accuracy of the IRIS imager. We present the results of investigation into the effects of potential ghosting in the IRIS optical design. Each source in the IRIS imager field of view results in ghost images on the detector from IRIS’s wedge filters, entrance window, and Atmospheric Dispersion Corrector (ADC) prism. We incorporated each of these ghosts into the IRIS simulator by simulating an appropriate magnitude point source at a specified pixel distance, and for the case of the extended ghosts redistributing flux evenly over the area specified by IRIS’s optical design. We simulate the ghosting impact on the photometric capabilities, and found that ghosts generally contribute negligible effects on the flux counts for point sources except for extreme cases where ghosts coalign with a star of ▵m>2 fainter than the ghost source. Lastly, we explore the photometric precision and accuracy for single sources and crowded field photometry on the IRIS imager.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2314258DOIArticle
https://arxiv.org/abs/1808.07497arXivDiscussion Paper
ORCID:
AuthorORCID
Walth, Gregory0000-0002-6313-6808
Wright, Shelley A.0000-0003-1034-8054
Do, Tuan0000-0001-9554-6062
Larkin, James E.0000-0001-7687-3965
Riddle, Reed L.0000-0002-0387-370X
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). The TMT Project gratefully acknowledges the support of the TMT collaborating institutions. They are the California Institute of Technology, the University of California, the National Astronomical Observatory of Japan, the National Astronomical Observatories of China and their consortium partners, the Department of Science and Technology of India and their supported institutes, and the National Research Council of Canada. This work was supported as well by the Gordon and Betty Moore Foundation, the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Canadian Universities for Research in Astronomy (ACURA), the Association of Universities for Research in Astronomy (AURA), the U.S. National Science Foundation, the National Institutes of Natural Sciences of Japan, and the Department of Atomic Energy of India.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
National Astronomical Observatory of JapanUNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC)UNSPECIFIED
Department of Science and Technology (India)UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
National Institutes of Natural Sciences of JapanUNSPECIFIED
Department of Atomic Energy (India)UNSPECIFIED
Subject Keywords:infrared:imaging, data:simulator, instrumentation: near-infrared, imaging:photometric, giant segmented mirror telescopes: Thirty Meter Telescope
Record Number:CaltechAUTHORS:20190103-153503299
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20190103-153503299
Official Citation:Nils Rundquist, Gregory Walth, Shelley A. Wright, Ryuji Suzuki, Tuan Do, Edward L. Chapin, Eric Chisholm, Jennifer Dunn, Yutaka Hayano, Chris Johnson, James E. Larkin, Reed L. Riddle, Matthias Schoeck, Ji Man Sohn, "The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric precision and ghost analysis," Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 10702A7 (16 July 2018); doi: 10.1117/12.2314258
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:92047
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:07 Jan 2019 15:56
Last Modified:07 Jan 2019 15:56

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