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14 July 2008 High efficiency near infrared spectrometer for zodiacal light spectral study
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We are developing a near infrared spectrometer for measuring solar absorption lines in the zodiacal light in the near infrared region. it has been recently demonstrated1 that observing single Fraunhofer line can be a powerful tool for extracting zodiacal light parameters based on the measurements of the profile of the Mg I line at 5184 A. We are extending this technique to the near infrared with the primary goal of measuring the absolute intensity of the zodiacal light. This measurement will provide the crucial information needed to accurately subtract zodiacal emission from the DIRBE (Diffuse Infrared Background Experiment) diffuse sky measurements to determine the intensity of the extragalactic infrared background. The instrument design is based on a dual Fabry-Perot interferometer with a narrow band filter. Its double etalon design allows to achieve high spectral contrast to reject the bright out of band atmospheric hydroxyl emission. High spectral contrast is absolutely necessary to achieve detection limits needed to accurately measure the intensity of the absorption line. We present the design, the estimated performance of the instrument, and the expected results of the observing program.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. S. Kutyrev, R. Arendt, E. Dwek, S. H. Moseley, D. Rapchun, and R. F. Silverberg "High efficiency near infrared spectrometer for zodiacal light spectral study", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143N (14 July 2008);

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