The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric precision and ghost analysis
Creators
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1.
University of California, San Diego
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2.
National Astronomical Observatory of Japan
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3.
University of California, Los Angeles
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4.
National Research Council Canada
Contributors
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.
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.Attached Files
Published - 10702A7.pdf
Accepted Version - 1808.07497.pdf
Files
10702A7.pdf
Additional details
Identifiers
- Eprint ID
- 92047
- Resolver ID
- CaltechAUTHORS:20190103-153503299
Related works
- Describes
- https://arxiv.org/abs/1808.07497 (URL)
Funding
- Caltech
- University of California
- National Astronomical Observatory of Japan
- National Astronomical Observatories, Chinese Academy of Sciences (NAOC)
- Department of Science and Technology (India)
- National Research Council of Canada
- Gordon and Betty Moore Foundation
- Canada Foundation for Innovation
- Ontario Ministry of Research and Innovation
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- British Columbia Knowledge Development Fund
- Association of Canadian Universities for Research in Astronomy (ACURA)
- Association of Universities for Research in Astronomy (AURA)
- NSF
- National Institutes of Natural Sciences of Japan
- Department of Atomic Energy (India)
Dates
- Created
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2019-01-07Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Thirty Meter Telescope
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 10702