The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. IV. Aperture Masking Interferometry

Article


Sivaramakrishnan, Anand, Tuthill, Peter, Lloyd, James P., Greenbaum, Alexandra Z., Thatte, Deepashri, Cooper, Rachel A., Vandal, Thomas, Kammerer, Jens, Sanchez-Bermudez, Joel and Pope, Benjamin J. S.. 2023. "The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. IV. Aperture Masking Interferometry." Publications of the Astronomical Society of the Pacific. 135 (1043). https://doi.org/10.1088/1538-3873/acaebd
Article Title

The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. IV. Aperture Masking Interferometry

ERA Journal ID1082
Article CategoryArticle
AuthorsSivaramakrishnan, Anand, Tuthill, Peter, Lloyd, James P., Greenbaum, Alexandra Z., Thatte, Deepashri, Cooper, Rachel A., Vandal, Thomas, Kammerer, Jens, Sanchez-Bermudez, Joel and Pope, Benjamin J. S.
Journal TitlePublications of the Astronomical Society of the Pacific
Journal Citation135 (1043)
Article Number015003
Number of Pages20
Year2023
PublisherIOP Publishing
Place of PublicationUnited States
ISSN0004-6280
1538-3873
Digital Object Identifier (DOI)https://doi.org/10.1088/1538-3873/acaebd
Web Address (URL)https://iopscience.iop.org/article/10.1088/1538-3873/acaebd
Abstract

The James Webb Space Telescope’s Near Infrared Imager and Slitless Spectrograph (JWST-NIRISS) flies a 7-hole non-redundant mask (NRM), the first such interferometer in space, operating at 3-5 μm wavelengths, and a bright limit of ≃4 mag in W2. We describe the NIRISS Aperture Masking Interferometry (AMI) mode to help potential observers understand its underlying principles, present some sample science cases, explain its operational observing strategies, indicate how AMI proposals can be developed with data simulations, and how AMI data can be analyzed. We also present key results from commissioning AMI. Since the allied Kernel Phase Imaging (KPI) technique benefits from AMI operational strategies, we also cover NIRISS KPI methods and analysis techniques, including a new user-friendly KPI pipeline. The NIRISS KPI bright limit is ≃8 W2 (4.6 μm) magnitudes. AMI NRM and KPI achieve an inner working angle of ∼70 mas, which is well inside the ∼400 mas NIRCam inner working angle for its circular occulter coronagraphs at comparable wavelengths.

KeywordsHigh angular resolution (2167); Interferometers (805); Direct detection interferometry (386); Astronomy data reduction (1861)
ANZSRC Field of Research 2020510109. Stellar astronomy and planetary systems
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Byline AffiliationsSpace Telescope Science Institute, United States
American Museum of Natural History, United States
Johns Hopkins University, United States
University of Sydney
Cornell University, United States
California Institute of Technology (Caltech), United States
University of Montreal, Canada
National Autonomous University of Mexico, Mexico
Max Planck Institute for Astronomy, Germany
School of Mathematics, Physics and Computing
Centre for Astrophysics
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