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

被引:6
作者
Burke, Colin J. [1 ,2 ]
Peterson, John R. [1 ]
Egami, Eiichi [3 ]
Leisenring, Jarron M. [3 ]
Sembroski, Glenn H. [1 ]
Rieke, Marcia J. [3 ]
机构
[1] Purdue Univ, Dept Phys & Astron, W Lafayette, IN 47907 USA
[2] Univ Illinois, Dept Astron, Urbana, IL 61801 USA
[3] Univ Arizona, Steward Observ, Tucson, AZ USA
关键词
James Webb Space Telescope's near-infrared camera; image simulation; instrumentation; photon simulator; weak lensing; systematic; TEMPERATURE; ABSORPTION; MODEL;
D O I
10.1117/1.JATIS.5.3.038002
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
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. (C) 2019 Society of Photo-Optical Instrumentation Engineers (SPIE)
引用
收藏
页数:14
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