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A new solar irradiance calibration from 3295 A to 8500 A derived from absolute spectrophotometry of VegaBy imaging sunlight diffracted by 20- and 30-micron diameter pinholes onto the entrance aperture of a photoelectric grating scanner, the solar spectral irradiance was determined relative to the spectrophotometric standard star Vega, observed at night with the same instrument. Solar irradiances are tabulated at 4 A increments from 3295 A to 8500 A. Over most of the visible spectrum, the internal error of measurement is less than 2 percent. This calibration is compared with earlier irradiance measurements by Neckel and Labs (1984) and by Arvesen et al. (1969) and with the high-resolution solar atlas by Kurucz et al. The three calibrations agree well in visible light but differ by as much as 10 percent in the ultraviolet.
Document ID
19920054163
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lockwood, G. W.
(Lowell Observatory Flagstaff, AZ, United States)
Tueg, H.
(Bochum, Ruhr-Universitaet Federal Republic of Germany, United States)
White, N. M.
(Lowell Observatory Flagstaff, AZ, United States)
Date Acquired
August 15, 2013
Publication Date
May 10, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 390
Issue: 2 Ma
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
92A36787
Funding Number(s)
CONTRACT_GRANT: NAGW-1505
Distribution Limits
Public
Copyright
Other

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