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Proceedings Paper

Astrometric accuracy of aperture making interferometry with JWST-NIRISS
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Paper Abstract

JWST/NIRISS has a non-redundant aperture mask (NRM) for use with its F380M, F430M, F480M and F277W filters. In addition to high-resolution imaging with moderate contrast, the NRM provides better astrometric accuracy over a wide field of view than regular imaging. We investigate the accuracy achievable with the NRM by using an image-plane algorithm to analyze the PSFs of a point source that were obtained at a fixed pixel location with sub-pixel dithers during the second Cryo-Vacuum test campaign of the Integrated Science Instrument Module at NASA’s Goddard Space Flight Center. Astrometry of brown dwarfs with the NRM will be sensitive to the presence of terrestrial planets and can be used to probe the architecture of planetary systems around these objects.

Paper Details

Date Published: 16 September 2015
PDF: 6 pages
Proc. SPIE 9605, Techniques and Instrumentation for Detection of Exoplanets VII, 96052F (16 September 2015); doi: 10.1117/12.2188543
Show Author Affiliations
Deepashri Thatte, Space Telescope Science Institute (United States)
Alexandra Greenbaum, Johns Hopkins Univ. (United States)
André Martel, Space Telescope Science Institute (United States)
NRC Herzberg Astronomy and Astrophysics (Canada)
Anand Sivaramakrishnan, Space Telescope Science Institute (United States)
Étienne Artigau, Univ. de Montréal (Canada)


Published in SPIE Proceedings Vol. 9605:
Techniques and Instrumentation for Detection of Exoplanets VII
Stuart Shaklan, Editor(s)

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