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An analysis of scattered light in low dispersion IUE spectraA detailed numerical simulation of light scattering from the low-resolution grating in the short wavelength spectrograph of the IUE Observatory was developed, in order to quantitatively analyze the effects of scattering on both continuum and line emission spectra. It is found that: (1) the redistribution of light by grating scattering did not appreciably alter either the shape or the absolute flux level of continuum spectra for A-F stars; (2) late-type stellar continua showed a tendency to flatten when observed in scattered light toward the shorter wavelengths; and (3) the effect of grating scattering on emission lines is to decrease measured line intensities by an increasing percentage toward the shorter wavelengths. The spectra obtained from scattering experiments for solar-type and late type stars are reproduced in graphic form.
Document ID
19850047363
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Basri, G.
(California Univ. Berkeley, CA, United States)
Clarke, J. T.
(California, University Berkeley, CA, United States)
Haisch, B. M.
(Lockheed Research Laboratories Palo Alto, CA, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1985
Publication Information
Publication: Astronomy and Astrophysics
Volume: 144
Issue: 1 Ma
ISSN: 0004-6361
Subject Category
Astrophysics
Accession Number
85A29514
Funding Number(s)
CONTRACT_GRANT: NAG5-69
Distribution Limits
Public
Copyright
Other

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