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

John M. Harlander; Huan Tran; Fred L. Roesler; Kurt P. Jaehnig; Scott M. Seo; Wilton T. Sanders III; Ronald J. Reynolds

doi:10.1117/12.186821

16 September 1994 Field-widened spatial heterodyne spectroscopy: correcting for optical defects and new vacuum ultraviolet performance tests

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

Author Affiliations +

Proceedings Volume 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V; (1994) https://doi.org/10.1117/12.186821
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

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John M. Harlander, Huan Tran, Fred L. Roesler, Kurt P. Jaehnig, Scott M. Seo, Wilton T. Sanders III, and Ronald J. Reynolds "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, (16 September 1994); https://doi.org/10.1117/12.186821

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