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The Kitt Peak Magnetograph. IV: 40-Channel Probe and the Detection of Weak Photospheric Fields

Published online by Cambridge University Press:  14 August 2015

W. Livingston  and
J. Harvey
W. Livingston
Affiliation:
Kitt Peak National Observatory*, Tucson, Arizona, U.S.A.
J. Harvey
Affiliation:
Kitt Peak National Observatory*, Tucson, Arizona, U.S.A.

Abstract

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The 40-channel magnetograph is described. Special attention is given to details of the fiber-optic probe which dissects the Fraunhofer line image and provides for a choice of spectral and spatial resolution. Examples of magnetograms taken with the instrument are shown. Maps of quiet areas, made with long integration times to achieve a noise of 0.4 G, yet with 5 arc-sec resolution, indicate the presence everywhere of a minimum background field of average strength 2–3 G.

Type
Part I: Instrumentation – Measurement Fields in the Solar Atmosphere
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 51 - 61
Copyright
Copyright © Reidel 1971 

References

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