Share Email Print
cover

Proceedings Paper

Updated point spread function simulations for JWST with WebbPSF
Author(s): Marshall D. Perrin; Anand Sivaramakrishnan; Charles-Philippe Lajoie; Erin Elliott; Laurent Pueyo; Swara Ravindranath; Loïc Albert
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Accurate models of optical performance are an essential tool for astronomers, both for planning scientific observations ahead of time, and for a wide range of data analysis tasks such as point-spread-function (PSF)-fitting photometry and astrometry, deconvolution, and PSF subtraction. For the James Webb Space Telescope, the WebbPSF program provides a PSF simulation tool in a flexible and easy-to-use software package available to the community and implemented in Python. The latest version of WebbPSF adds new support for spectroscopic modes of JWST NIRISS, MIRI, and NIRSpec, including modeling of slit losses and diffractive line spread functions. It also provides additional options for modeling instrument defocus and/or pupil misalignments. The software infrastructure of WebbPSF has received enhancements including improved parallelization, an updated graphical interface, a better configuration system, and improved documentation. We also present several comparisons of WebbPSF simulated PSFs to observed PSFs obtained using JWST's flight science instruments during recent cryovac tests. Excellent agreement to first order is achieved for all imaging modes cross-checked thus far, including tests for NIRCam, FGS, NIRISS, and MIRI. These tests demonstrate that WebbPSF model PSFs have good fidelity to the key properties of JWST's as-built science instruments.

Paper Details

Date Published: 28 August 2014
PDF: 11 pages
Proc. SPIE 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave, 91433X (28 August 2014); doi: 10.1117/12.2056689
Show Author Affiliations
Marshall D. Perrin, Space Telescope Science Institute (United States)
Anand Sivaramakrishnan, Space Telescope Science Institute (United States)
Charles-Philippe Lajoie, Space Telescope Science Institute (United States)
Erin Elliott, Space Telescope Science Institute (United States)
Laurent Pueyo, Space Telescope Science Institute (United States)
Swara Ravindranath, Space Telescope Science Institute (United States)
Loïc Albert, Univ. de Montréal (Canada)


Published in SPIE Proceedings Vol. 9143:
Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark Clampin; Giovanni G. Fazio; Howard A. MacEwen, Editor(s)

© SPIE. Terms of Use
Back to Top