Mid-infrared interferometry on spectral lines: I. Instrumentation
نویسندگان
چکیده
The Infrared Spatial Interferometer at University of California, Berkeley has been outÐtted with a Ðlter-bank system to allow interferometric observations of mid-infrared spectral lines with very high spectral resolution (j/*jD 105). This paper describes the design, implementation, and performance of the matched 32 channel Ðlter-bank modules, and new spectral-line observations of Mars and IRC ]10216 are used to demonstrate their scientiÐc capability. In addition, observing strategies are discussed for accurate calibration of fringe visibilities in spectral lines, despite strong atmospheric Ñuctuations encountered in the infrared. Subject headings : instrumentation : interferometers È instrumentation : spectrographs È techniques : interferometric
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