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Observations of vector magnetic fields with a magneto-optic filter

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Abstract

We describe the use of the magneto-optic filter (MOF) to observe solar magnetic fields in the potassium line at 7699 Å. The filter has been used in the Big Bear video-magnetograph since 23 October. It gives a high sensitivity and dynamic range for longitudinal magnetic fields and enables us to measure transverse magnetic fields using the sigma component. Examples of the observations are presented.

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Authors and Affiliations

  1. Jet Propulsion Laboratory and University of Rome, Italy

    Alessandro Cacciani

  2. Big Bear Solar Observatory, California Inst. of Technology, 91125, Pasadena, CA, U.S.A.

    John Varsik & Harold Zirin

Authors
  1. Alessandro Cacciani
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  2. John Varsik
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  3. Harold Zirin
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NRC Senior Res. Fellow.

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Cacciani, A., Varsik, J. & Zirin, H. Observations of vector magnetic fields with a magneto-optic filter. Sol Phys 125, 173–178 (1990). https://doi.org/10.1007/BF00154786

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  • DOI: https://doi.org/10.1007/BF00154786

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