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Proceedings Paper

Absolute flux calibrations of stars
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Paper Abstract

Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega calibrated by using the Planck radiance from a Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 30 years that offer the potential to improve both terrestrial and space-based absolute stellar photometry. These advances include new high-temperature blackbody standards, absolute cryogenic radiometry, solid-state optical radiation sources, improved atmospheric transmittance modeling, and laser-based radiometric calibration. We describe the possible use of these new technologies for ground-based calibration of standard stars and their impact on stellar photometry, including present efforts to achieve highly accurate measurements from the ultraviolet to the near infrared for cosmological applications.

Paper Details

Date Published: 26 September 2007
PDF: 12 pages
Proc. SPIE 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV, 66780P (26 September 2007); doi: 10.1117/12.734600
Show Author Affiliations
Gerald T. Fraser, National Institute of Standards and Technology (United States)
Steven W. Brown, National Institute of Standards and Technology (United States)
Howard W. Yoon, National Institute of Standards and Technology (United States)
B. Carol Johnson, National Institute of Standards and Technology (United States)
Keith R. Lykke, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 6678:
Infrared Spaceborne Remote Sensing and Instrumentation XV
Marija Strojnik-Scholl, Editor(s)

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