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Krick_2021_AJ_161_177.pdf
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Author
Krick, J.E.Lowrance, P.
Carey, S.
Laine, S.
Grillmair, C.
Van Dyk, S.D.
Glaccum, W.J.
Ingalls, J.G.
Rieke, G.
Hora, J.L.
Fazio, G.G.
Gordon, K.D.
Bohlin, R.C.
Affiliation
Steward Observatory, The University of ArizonaIssue Date
2021Keywords
machine-readable tables
Metadata
Show full item recordPublisher
American Astronomical SocietyCitation
Krick, J. E., Lowrance, P., Carey, S., Laine, S., Grillmair, C., Van Dyk, S. D., ... & Bohlin, R. C. (2021). Spitzer IRAC Photometry of JWST Calibration Stars. The Astronomical Journal, 161(4), 177.Journal
Astronomical JournalRights
Copyright © 2021 The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We present infrared photometry of all 36 potential JWST calibrators for which there is archival Spitzer IRAC data. This photometry can then be used to inform the stellar models necessary to provide absolute calibration for all JWST instruments. We describe in detail the steps necessary to measure IRAC photometry from archive retrieval to photometric corrections. To validate our photometry, we examine the distribution of uncertainties from all detections in all four IRAC channels as well as compare the photometry and its uncertainties to those from models, ALLWISE, and the literature. Seventy-five percent of our detections have standard deviations per star of all observations within each channel of less than 3%. The median standard deviations are 1.2%, 1.3%, 1.1%, and 1.9% in [3.6]-[8.0], respectively. We find less than 8% standard deviations in differences of our photometry with ALLWISE and excellent agreement with literature values (less than 3% difference), lending credence to our measured fluxes. JWST is poised to do groundbreaking science, and accurate calibration and cross-calibration with other missions will be part of the underpinnings of that science. © 2021. The American Astronomical Society. All rights reserved..Note
Immediate accessISSN
0004-6256Version
Final published versionae974a485f413a2113503eed53cd6c53
10.3847/1538-3881/abe390