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    Spitzer IRAC Photometry of JWST Calibration Stars

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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.
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    Affiliation
    Steward Observatory, The University of Arizona
    Issue Date
    2021
    Keywords
    machine-readable tables
    
    Metadata
    Show full item record
    Publisher
    American Astronomical Society
    Citation
    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 Journal
    Rights
    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 access
    ISSN
    0004-6256
    DOI
    10.3847/1538-3881/abe390
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-3881/abe390
    Scopus Count
    Collections
    UA Faculty Publications

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