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Title:
A rediscussion of the atmospheric extinction and the absolute spectral-energy distribution of VEGA
Authors:
Hayes, D. S.; Latham, D. W.
Affiliation:
AA(Rensselaer Polytechnic Institute, Troy, N.Y.), AB(Smithsonian Astrophysical Observatory and Harvard College Observatory, Cambridge, Mass.)
Publication:
Astrophysical Journal, vol. 197, May 1, 1975, pt. 1, p. 593-601. (ApJ Homepage)
Publication Date:
05/1975
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Atmospheric Attenuation, Calibrating, Spectral Energy Distribution, Stellar Spectra, Astronomical Observatories, Atmospheric Models, Molecular Absorption, Rayleigh Scattering
DOI:
10.1086/153548
Bibliographic Code:
1975ApJ...197..593H

Abstract

For both the Lick and the Palomar calibrations of the spectral-energy distribution of Vega, the atmospheric extinction was treated incorrectly. A model is presented for extinction in the earth's atmosphere and this model is used to calculate corrections to the Lick and Palomar calibrations. A method is described that can be used to fabricate mean extinction coefficients for any mountain observatory. Selected portions of the corrected Lick and corrected Palomar calibrations are combined with the new Mount Hopkins calibration to generate an absolute spectral-energy distribution of Vega over the wavelength range 3300-10,800 A. Until better measurements become available, the use of this calibration is recommended for all practical applications.

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