The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Current Status and Improvement of the Fast Imaging Solar Spectrograph of the 1.6m telescope at Big Bear Solar Observatory

  • Park, Hyungmin (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
  • Chae, Jongchul (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
  • Song, Donguk (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
  • Yang, Heesu (Astronomy Program, Department of Physics and Astronomy, Seoul National University) ;
  • Jang, Bi-Ho (Korea Astronomy and Space Science Institute) ;
  • Park, Young-Deuk (Korea Astronomy and Space Science Institute) ;
  • Nah, Jakyoung (Korea Astronomy and Space Science Institute) ;
  • Cho, Kyung-Suk (Korea Astronomy and Space Science Institute) ;
  • Ahn, Kwangsu (Big Bear Solar Observatory, New Jersey Institute of Technology)
  • Published : 2012.10.17
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Abstract

For the study of fine-scale structure and dynamics in the solar chromosphere, the Fast Imaging Solar Spectrograph (FISS) was installed in 1.6m New Solar Telescope at Big Bear Solar Observatory in 2010. The instrument, installed at a vertical table of the Coude lab, is properly working and producing data for science. From the analysis of the data, however, we noticed that a couple of problems exist that deteriorate image quality : lower light level and poorer resolution of the CaII band data. After several tests, we found that the relay optics at the right position is crucial role for the spatial resolution of raster-scan images. By using resolution target, we re-aligned relay optics and other components of the spectrograph. Here we present the result of optical test and new data taken by the FISS.

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