PhoSim-NIRCam

Photon-by-photon image simulations of the James Webb Space Telescope's near-infrared camera

Colin J. Burke, John R. Peterson, Eiichi Egami, Jarron M. Leisenring, Glenn H. Sembroski, Marcia J Rieke

Research output: Contribution to journalArticle

Abstract

Recent instrumentation projects have allocated resources to develop codes for simulating astronomical images. Physics-based models are essential for understanding telescope, instrument, and environmental systematics in observations. A deep understanding of these systematics is especially important in the context of weak gravitational lensing, galaxy morphology, and other sensitive measurements. We present an adaptation of a physics-based ab initio image simulator: the photon simulator (PhoSim). We modify PhoSim for use with the near-infrared camera (NIRCam)-the primary imaging instrument aboard the James Webb Space Telescope. This photon Monte Carlo code replicates the observational catalog, telescope and camera optics, detector physics, and readout modes/electronics. Importantly, PhoSim-NIRCam simulates both geometric aberration and diffraction across the field of view. Full field- and wavelength-dependent point spread functions are presented. Simulated images of an extragalactic field are presented. Extensive validation is planned during in-orbit commissioning.

Original languageEnglish (US)
Article number038002
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume5
Issue number3
DOIs
StatePublished - Jul 1 2019

Fingerprint

James Webb Space Telescope
Space telescopes
simulators
simulator
near infrared
Photons
Simulators
Cameras
cameras
Infrared radiation
physics
Physics
photons
Telescopes
simulation
telescopes
Galaxies
Optical transfer function
point spread functions
field of view

Keywords

  • Image simulation
  • Instrumentation
  • James Webb Space Telescope's near-infrared camera
  • Photon simulator
  • Systematic
  • Weak lensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

PhoSim-NIRCam : Photon-by-photon image simulations of the James Webb Space Telescope's near-infrared camera. / Burke, Colin J.; Peterson, John R.; Egami, Eiichi; Leisenring, Jarron M.; Sembroski, Glenn H.; Rieke, Marcia J.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 5, No. 3, 038002, 01.07.2019.

Research output: Contribution to journalArticle

Burke, Colin J. ; Peterson, John R. ; Egami, Eiichi ; Leisenring, Jarron M. ; Sembroski, Glenn H. ; Rieke, Marcia J. / PhoSim-NIRCam : Photon-by-photon image simulations of the James Webb Space Telescope's near-infrared camera. In: Journal of Astronomical Telescopes, Instruments, and Systems. 2019 ; Vol. 5, No. 3.
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