# WFI focal plane persistence response

![WFI focal plane persistence response](https://assets.science.nasa.gov/dynamicimage/assets/science/missions/rst/science/WFI_focal_plane_persistence_response.png?w=1600&fit=clip)

- Released: January 30, 2026
- Category: spacecraft
- Credit: NASA
- NASA source: https://science.nasa.gov/mission/roman-space-telescope/wfi-technical/
- Page: https://roman.mixinvisuals.com/image/pfda39bf88a60/wfi-focal-plane-persistence-response/

WFI focal plane persistence response in the first dark after flat field illumination (56 frames at ~900 e - /s). The color scale is designed to emphasize the small differences in persistence response at the pixel level both within a given SCA and across the…