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dc.contributor.authorSu, K.Y.L.
dc.contributor.authorRieke, G.H.
dc.contributor.authorMarengo, M.
dc.contributor.authorSchlawin, E.
dc.date.accessioned2022-03-17T01:56:43Z
dc.date.available2022-03-17T01:56:43Z
dc.date.issued2022
dc.identifier.citationSu, K. Y. L., Rieke, G. H., Marengo, M., & Schlawin, E. (2022). Accurate Photometry of Saturated Stars Using the Point-spread-function Wing Technique with Spitzer. Astronomical Journal.
dc.identifier.issn0004-6256
dc.identifier.doi10.3847/1538-3881/ac3b5e
dc.identifier.urihttp://hdl.handle.net/10150/663552
dc.description.abstractWe report Spitzer 3.6 and 4.5 μm photometry of 11 bright stars relative to Sirius, exploiting the unique optical stability of the Spitzer Space Telescope point-spread function (PSF). Spitzer's extremely stable beryllium optics in its isothermal environment enables precise comparisons in the wings of the PSF from heavily saturated stars. These bright stars stand as the primary sample to improve stellar models, and to transfer the absolute flux calibration of bright standard stars to a sample of fainter standards useful for missions like JWST and for large ground-based telescopes. We demonstrate that better than 1% relative photometry can be achieved using the PSF wing technique in the radial range of 20″-100″ for stars that are fainter than Sirius by 8 mag (from outside the saturated core to a large radius where a high signal-to-noise ratio profile can still be obtained). We test our results by (1) comparing the [3.6]-[4.5] color with that expected between the WISE W1 and W2 bands, (2) comparing with stars where there is accurate K S photometry, and (3) also comparing with relative fluxes obtained with the DIRBE instrument on COBE. These tests confirm that relative photometry is achieved to better than 1%. © 2022. The Author(s). Published by the American Astronomical Society..
dc.language.isoen
dc.publisherAmerican Astronomical Society
dc.rightsCopyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleAccurate Photometry of Saturated Stars Using the Point-spread-function Wing Technique with Spitzer
dc.typeArticle
dc.typetext
dc.contributor.departmentSteward Observatory, University of Arizona
dc.contributor.departmentLunar and Planetary Laboratory, The University of Arizona
dc.identifier.journalAstronomical Journal
dc.description.noteOpen access article
dc.description.collectioninformationThis 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.
dc.eprint.versionFinal published version
dc.source.journaltitleAstronomical Journal
refterms.dateFOA2022-03-17T01:56:43Z


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Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
Except where otherwise noted, this item's license is described as Copyright © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence.