Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144..161b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 1, March 1985, p. 161-170.
Astronomy and Astrophysics
Astrophysics
20
Gratings (Spectra), Light Scattering, Stellar Spectrophotometry, Ultraviolet Spectra, A Stars, Computerized Simulation, Continuous Spectra, Data Processing, F Stars, Iue, Line Spectra, Parameterization
Scientific paper
A 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.
Basri Gibor
Clarke John T.
Haisch Bernard M.
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