Autor: |
Rizzo, Maxime J., Mundy, Lee G., Rinehart, Stephen A., Dhabal, Arnab, Fixsen, Dale J., Juanola-Parramon, Roser, Benford, Dominic J., Leisawitz, David T., Silverberg, Robert F., Veach, Todd J. |
Rok vydání: |
2015 |
Předmět: |
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Druh dokumentu: |
Working Paper |
DOI: |
10.1086/683176 |
Popis: |
Double-Fourier interferometry is the most viable path to sub-arcsecond spatial resolution for future astronomical instruments that will observe the universe at far-infrared wavelengths. The double transform spatio-spectral interferometry couples pupil plane beam combination with detector arrays to enable imaging spectroscopy of wide fields, that will be key to accomplishing top-level science goals. The wide field of view and the necessity for these instruments to fly above the opaque atmosphere create unique characteristics and requirements compared to instruments on ground-based telescopes. In this paper, we discuss some characteristics of single-baseline spatio-spectral interferometers. We investigate the impact of intensity and optical path difference noise on the interferogram and the spectral signal-to-noise ratio. We apply our findings to the special case of the Balloon Experimental Twin Telescope for Infrared Interferometry (BETTII), a balloon payload that will be a first application of this technique at far-infrared wavelengths on a flying platform. |
Databáze: |
arXiv |
Externí odkaz: |
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