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Wavelengths of Solar Lines in the 50–380 Å Region and their Identifications

Published online by Cambridge University Press:  12 April 2016

U. Feldman ,
W. Behring  and
L. Cohen
U. Feldman
Affiliation:
Dept. of Physics and Astronomy, Tel-Aviv University, Israel
W. Behring
Affiliation:
Goddard Space Flight Center, Greenbelt, Md., U.S.A.
L. Cohen
Affiliation:
Goddard Space Flight Center, Greenbelt, Md., U.S.A.

Extract

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In this work we decided to concentrate on the region 50–380 Å for which the grazing incidence grating spectrograph is the most suitable instrument. This portion of the spectrum contains many rather intense lines lying very close together which arise primarily from very highly ionized atoms in the solar corona. Wavelength measurements and identifications have been made for a portion of the lines, but for many of them, especially the weaker ones, the situation was not completely clear and many doubts existed. Therefore we decided to build a rocket spectrograph which would significantly improve the resolution and wavelength accuracy for lines in the solar spectrum. Thus, we attempted to achieve wavelength accuracy of 0.003 Å and to limit the instrumental broadening of the lines to 0.03 Å.

Type
Section III / Stellar and Solar UV Radiation
Information
International Astronomical Union Colloquium , Volume 14: Special Issue: Ultraviolet and X-Ray Spectroscopy of Astrophysical and Laboratory Plasmas , November 1972 , pp. 608 - 609
Copyright
Copyright © Reidel 1972