WFIRST CGI Integral Field Spectrograph Performance and Post-Processing in the OS6 Observing Scenario

Rizzo, Maxime J ; Zimmerman, Neil T ; Groff, Tyler D ; Krist, John ; Eldorado Riggs, A J ; Gong, Qian ; Mandell, Avi M ; Saxena, Prabal ; McElwain, Michael W ; Roberge, Aki

关键词: WIDE-FIELD INFRARED SURVEY TELESCOPE (WFIRST);    CORONAGRAPHS;    SPECTROGRAPHS;    TEMPORAL DISTRIBUTION;    PERFORMANCE PREDICTION;    SPATIAL DISTRIBUTION;   

RP-ID  :  GSFC-E-DAA-TN66130

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 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.