WFIRST Coronagraph Integral Field Spectrograph Performance in the OS6 Observing Scenario

被引：3
|
作者：
Rizzo, Maxime J. [1 ]
Zimmerman, Neil T. [1 ]
Groff, Tyler D. [1 ]
Krist, John [2 ]
Riggs, A. J. Eldorado [2 ]
Gong, Qian [1 ]
Mandell, Avi M. [1 ]
Saxena, Prabal [1 ]
McElwain, Michael W. [1 ]
Roberge, Aki [1 ]
机构：
[1] NASA, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA
[2] CALTECH, Jet Prop Lab, Pasadena, CA USA
来源：
SPACE TELESCOPES AND INSTRUMENTATION 2018: OPTICAL, INFRARED, AND MILLIMETER WAVE | 2018年 / 10698卷
关键词：
Integral field spectroscopy; coronagraphy; high-contrast; spectrograph;
D O I：
10.1117/12.2312400
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The WFIRST coronagraph instrument (CGI) will have an integral field spectrograph (IFS) backend to disperse the entire field of view at once and obtain spatially-resolved, low-resolution spectra of the speckles and science scene. The IFS will be key to understanding the spectral nature of the speckles, obtain science spectra of planets and disks, and will be used for broadband wavefront control. In order to characterize, predict, and optimize the performance of the instrument, we present a detailed model of the IFS in the context of the new OS6 observing scenario. The simulation includes spatial, spectral, and temporal variations of the speckle field on the IFS detector plane, which allows us to explore several post-processing methods and assess what gains can be expected. The simulator includes the latest models of the detector behavior when operating in photon-counting mode.
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页数：10
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