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Absolute Flux Calibration of the IRAC Instrument on the Spitzer Space Telescope Using Hubble Space Telescope Flux Standards

Bohlin, R. C. and Gordon, K. D. and Rieke, G. H. and Ardila, D. and Carey, S. and Deustua, S. and Engelbracht, C. and Ferguson, H. C. and Flanagan, K. and Kalirai, J. and Meixner, M. and Noriega-Crespo, A. and Su, K. Y. L. and Tremblay, P.-E. (2011) Absolute Flux Calibration of the IRAC Instrument on the Spitzer Space Telescope Using Hubble Space Telescope Flux Standards. Astronomical Journal, 141 (5). Art. No. 173. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20110504-114302003

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Abstract

The absolute flux calibration of the James Webb Space Telescope (JWST) will be based on a set of stars observed by the Hubble and Spitzer Space Telescopes. In order to cross-calibrate the two facilities, several A, G, and white dwarf stars are observed with both Spitzer and Hubble and are the prototypes for a set of JWST calibration standards. The flux calibration constants for the four Spitzer IRAC bands 1-4 are derived from these stars and are 2.3%, 1.9%, 2.0%, and 0.5% lower than the official cold-mission IRAC calibration of Reach et al., i.e., in agreement within their estimated errors of ~2%. The causes of these differences lie primarily in the IRAC data reduction and secondarily in the spectral energy distributions of our standard stars. The independent IRAC 8 μm band-4 fluxes of Rieke et al. are about 1.5% ± 2% higher than those of Reach et al. and are also in agreement with our 8 μm result.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/0004-6256/141/5/173DOIArticle
http://iopscience.iop.org/1538-3881/141/5/173/PublisherArticle
ORCID:
AuthorORCID
Rieke, G. H.0000-0003-2303-6519
Carey, S.0000-0002-0221-6871
Ferguson, H. C.0000-0001-7113-2738
Kalirai, J.0000-0001-9690-4159
Noriega-Crespo, A.0000-0002-6296-8960
Additional Information:© 2011 American Astronomical Society. Received 2011 February 10; accepted 2011 March 7; published 2011 April 7. Support for this work was provided by NASA through the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS5-26555. Thanks to A. Gianninas for supplying the 60,000 K SED with CNO that appears in Figure 3.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
NASANAS5-26555
Subject Keywords:stars: atmospheres, stars: fundamental parameters, techniques: spectroscopic
Issue or Number:5
Classification Code:PACS: 97.20.Ge; 97.20.Rp; 97.10.Ex; 97.20.Jg
Record Number:CaltechAUTHORS:20110504-114302003
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110504-114302003
Official Citation:Absolute Flux Calibration of the IRAC Instrument on the Spitzer Space Telescope Using Hubble Space Telescope Flux Standards R. C. Bohlin et al. 2011 The Astronomical Journal 141 173
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23553
Collection:CaltechAUTHORS
Deposited By: Benjamin Perez
Deposited On:04 May 2011 20:53
Last Modified:04 Nov 2019 22:42

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