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Proceedings Article

Field-widened spatial heterodyne spectroscopy: correcting for optical defects and new vacuum ultraviolet performance tests

[+] Author Affiliations
John M. Harlander, Huan Tran

St. Cloud State Univ. (USA)

Fred L. Roesler, Kurt P. Jaehnig, Scott M. Seo, Wilton T. Sanders III, Ronald J. Reynolds

Univ. of Wisconsin/Madison (USA)

Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, 310 (September 16, 1994); doi:10.1117/12.186821
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From Conference Volume 2280

  • EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V
  • Oswald H. W. Siegmund; John V. Vallerga
  • San Diego, CA | July 24, 1994

abstract

We are developing a field-widened Spatial Heterodyne Spectrometer (SHS) for suborbital observations of the hot component of the diffuse interstellar medium. Our goal for these observations is to obtain the first velocity-resolved (20 km/s) line profiles of the CIV 154.8 nm emission line from the Cygnus loop and from one direction at high galactic latitude. Long term, our interest is to develop an SHS instrument for a radial-velocity-resolved sky survey of the 105 K 'coronal gas' component of the interstellar medium using a small satellite. We describe the basic SHS technique along with vacuum ultraviolet demonstrations using our prototype interferometer. We also describe a new data reduction technique which corrects for instrumental distortions resulting from optical defects.

© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

John M. Harlander ; Huan Tran ; Fred L. Roesler ; Kurt P. Jaehnig ; Scott M. Seo, et al.
"Field-widened spatial heterodyne spectroscopy: correcting for optical defects and new vacuum ultraviolet performance tests", Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, 310 (September 16, 1994); doi:10.1117/12.186821; http://dx.doi.org/10.1117/12.186821


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